WO2022037565A1 - Access method and system for memory, memory access management module, energy efficiency ratio controller and computer-readable storage medium - Google Patents

Abstract

An access method and system for a memory, a memory access management module, an energy efficiency ratio controller, and a computer-readable storage medium, which relate to the field of storage technology. The method comprises: acquiring a memory access bandwidth reduction instruction from the energy efficiency ratio controller, wherein the memory access bandwidth reduction instruction is generated when the energy efficiency ratio controller detects that a temperature control parameter of the memory is higher than a corresponding parameter threshold; reducing the current access bandwidth for accessing the memory to obtain a new access bandwidth; and sending an access request to the memory according to the new access bandwidth.

Description

Memory access method and system, memory access management module, energy efficiency ratio controller, and computer-readable storage medium

This application claims the priority of the Chinese Patent Application No. 202010850808.4 filed with the China Patent Office on August 21, 2020, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the technical field of storage.

Background technique

High Bandwidth Memory (HBM) is a kind of memory that has emerged in recent years, and is mainly used in data centers, artificial intelligence and other fields that require high bandwidth. HBM generally reduces the complexity and cost of single-board design by sharing the substrate with the main logic function chip and packaging it together, and achieves higher data reading through a large number of input/output interface (Input/Output, I/O) bit widths Write transfer bandwidth, and reduce the contact area with the printed circuit board by stacking multiple storage media in the vertical direction.

SUMMARY OF THE INVENTION

A first aspect of the embodiments of the present application provides a memory access method, including: acquiring a memory access bandwidth reduction instruction from an energy efficiency ratio controller, where the memory access bandwidth reduction instruction monitors a temperature control parameter of the memory by the energy efficiency ratio controller Generated when the threshold is higher than the corresponding parameter; reduce the current access bandwidth of accessing the memory to obtain a new access bandwidth; and send an access request to the memory according to the new access bandwidth.

A second aspect of the embodiments of the present application provides a method for accessing a memory, including: acquiring a temperature control parameter of the memory; in response to the temperature control parameter being higher than a corresponding parameter threshold, generating a memory access bandwidth reduction instruction; The bandwidth reduction instruction is sent to the memory access management module, so as to control the memory access management module to reduce the memory access bandwidth through the memory access bandwidth reduction instruction.

A third aspect of the embodiments of the present application provides a memory access management module: including a storage device, a processing device, a program stored on the storage device and executable on the processing device, and a module for implementing communication between the processing device and the storage device The data bus is connected to the communication, and when the program is executed by the processing device, the memory access method provided by the first aspect of the embodiments of the present application is implemented.

A fourth aspect of the embodiments of the present application provides an energy efficiency ratio controller, which includes a storage device, a processing device, a program stored on the storage device and executable on the processing device, and an energy efficiency ratio controller for implementing a communication between the processing device and the storage device. The communication data bus is connected, and when the program is executed by the processing device, the memory access method provided by the second aspect of the embodiments of the present application is implemented.

A fifth aspect of the embodiments of the present application provides a memory access system, including the memory access management module and the energy efficiency ratio controller provided by the embodiments of the present application, and further including a bandwidth monitor, a temperature monitor, and a power consumption monitor; The temperature monitor is connected to the memory and the energy efficiency ratio controller respectively, and is set to monitor the temperature of the memory according to the first monitoring period, and sends the monitored temperature to the energy efficiency ratio controller; the power consumption monitor is respectively connected to the memory and the energy efficiency ratio controller. It is connected to the energy efficiency ratio controller, and is set to monitor the power consumption of the memory according to the second monitoring period, and sends the monitored power consumption to the energy efficiency ratio controller; the bandwidth monitor is respectively connected to the memory access management module and the memory control module connected to the memory. The device is connected to the energy efficiency ratio controller, and is set to monitor the bandwidth of the memory according to the third monitoring period, and sends the monitored bandwidth to the energy efficiency ratio controller; the energy efficiency ratio controller, connected to the controller access management module, is set to Obtain the temperature control parameter of the memory; in response to the temperature control parameter being higher than the corresponding parameter threshold, generate a memory access bandwidth reduction instruction, and send the memory access bandwidth reduction instruction to the memory access management module, so as to control the memory access management through the memory access bandwidth reduction instruction The module reduces the access bandwidth of the memory; and, the memory access management module is connected to the host and the memory controller, respectively, and is configured to obtain the memory access bandwidth reduction instruction from the energy efficiency ratio controller, and the memory access bandwidth reduction instruction is monitored by the energy efficiency ratio controller. Generated when the temperature control parameter to the memory is higher than the corresponding parameter threshold; reduce the current access bandwidth for accessing the memory to obtain a new access bandwidth; send an access request to the memory according to the new access bandwidth.

A sixth aspect of the embodiments of the present application further provides a computer-readable storage medium on which one or more programs are stored, and the one or more programs can be executed by one or more processors to implement the present application. Examples of any of the memory access methods provided.

Description of drawings

FIG. 1 is a flowchart of a method for accessing a memory provided by an embodiment of the present application.

FIG. 2a is a flowchart of a method for accessing a memory provided by an embodiment of the present application.

FIG. 2b is a schematic diagram of an expanded address provided by an embodiment of the present application.

FIG. 2c is a schematic diagram of an address arrangement manner provided by an embodiment of the present application.

FIG. 2d is a schematic diagram of a historical access record provided by an embodiment of the present application.

FIG. 3 is a flowchart of a method for accessing a memory provided by an embodiment of the present application.

FIG. 4 is a structural block diagram of an apparatus for accessing a memory provided by an embodiment of the present application.

FIG. 5 is a structural block diagram of an apparatus for accessing a memory provided by an embodiment of the present application.

FIG. 6 is a schematic structural diagram of a memory access management module provided by an embodiment of the present application.

FIG. 7 is a schematic structural diagram of an energy efficiency ratio controller provided by an embodiment of the present application.

FIG. 8 is a schematic structural diagram of a memory access system provided by an embodiment of the present application.

detailed description

It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

HBM is a type of memory that has emerged in recent years, and is mainly used in data centers, artificial intelligence and other fields that require high bandwidth. However, the co-packaging process with the main logic function chip, a large number of IO bit widths and the stacking of storage media will increase the temperature of the HBM itself, resulting in a decrease in the read and write reliability of the HBM.

In view of this, an embodiment of the present application provides a method for accessing a memory. The method may be performed by a memory access device, the device may be implemented by software and/or hardware, and the device may be configured in a control chip, typically, a memory access management control module. This method can be applied in scenarios where memory access is managed. As shown in FIG. 1 , the method for accessing a memory provided by an embodiment of the present application includes the following steps S101 to S103.

In step S101, a memory access bandwidth reduction instruction from the energy efficiency ratio controller is obtained, and the memory access bandwidth reduction instruction is generated when the energy efficiency ratio controller detects that the temperature control parameter of the memory is higher than a corresponding parameter threshold.

In this step, the memory access bandwidth reduction instruction can be understood as a control instruction for reducing the current access bandwidth of the memory managed by the memory access management control module, which can be controlled by the energy efficiency ratio controller when the temperature control parameter of the memory is higher than the preset value. Generated and sent to the memory access management module when the parameter threshold is set. The temperature control parameter of the memory may be understood as a parameter for monitoring the temperature of the memory, which includes at least one of the temperature, power consumption, and bandwidth of the memory. Preferably, the temperature control parameters may include the temperature, power consumption, and bandwidth of the memory, so as to further improve the accuracy of monitoring the temperature of the memory. This situation is used as an example for description below.

The energy efficiency ratio controller generates a memory access bandwidth controller when at least one of the three parameter items of memory temperature, power consumption and bandwidth is greater than the corresponding parameter threshold, and sends the access bandwidth controller to the memory access management module. Correspondingly, the memory access management module receives the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller.

In step S102, the current access bandwidth for accessing the memory is reduced to obtain a new access bandwidth.

The current access bandwidth of the memory can be understood as the bandwidth of the memory access management module sending access requests to the memory at the current moment, that is, the memory access management module forwards the number of read and write commands and write data sent by the host to the memory controller connected to the memory in a unit time. The new access bandwidth can be understood as the access bandwidth obtained after the current access bandwidth is reduced. The way to reduce the current access bandwidth of the memory can be selected as required, such as reducing the current access bandwidth of the memory by a set bandwidth step, reducing the current access bandwidth of the memory by a set percentage, or reducing the current access bandwidth of the memory to the set bandwidth. value, etc., which are not limited in this embodiment of the present application.

In an exemplary implementation, the memory access management module may reduce the current access bandwidth of the memory by a preset bandwidth step size each time it receives a memory access bandwidth reduction instruction sent by the energy efficiency ratio controller, and further reduce the memory access bandwidth in the current memory The bandwidth at the moment is reduced by the preset bandwidth step size, so as to avoid the situation that the memory access rate is too slow due to the excessive reduction of the memory bandwidth. Preferably, reducing the current access bandwidth of the memory may include: reducing the current access bandwidth of the memory by a preset bandwidth step size. The preset bandwidth step size can be set as required, for example, the preset bandwidth compensation can be set to 1MB, 2MB or other bandwidth values.

Exemplarily, when receiving the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller, the memory access management module obtains the current access bandwidth of the memory, and calculates the difference between the current access bandwidth and the preset bandwidth step size to obtain a new access bandwidth. bandwidth.

In the above embodiment, when the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller is not received again, the new access bandwidth may be a fixed value or a non-fixed value. For example, after calculating the difference between the current access bandwidth and the preset bandwidth step size, the number of read data sent by the memory to the host per unit time may not be considered, that is, the memory controller forwards the memory read data to the memory access management module regardless of the read data. The occupied response bandwidth is directly used as the new access bandwidth, and an access request is sent to the memory according to the new access bandwidth, until the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller is received again; the memory per unit time can also be considered. The number of read data sent to the host, that is, considering the response bandwidth occupied by the memory controller to forward the read data of the memory to the memory access management module, when receiving the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller, it directly changes the current memory of the memory. The access bandwidth is reduced by the preset bandwidth step size, and a new access bandwidth is obtained, so as to reduce the bandwidth (including the access bandwidth and the response bandwidth) of the memory at the current moment by the preset bandwidth step size to obtain a new bandwidth, and then send the memory to the memory according to the new access bandwidth. In the process of sending an access request, the value of the new access bandwidth is adjusted in real time according to the change of the response bandwidth of the memory to ensure that the bandwidth of the memory (that is, the sum of the access bandwidth and the response bandwidth) is always the new bandwidth until the energy efficiency ratio is received again. until the controller sends a memory access bandwidth reduction command.

In step S103, an access request is sent to the memory according to the new access bandwidth.

Exemplarily, the memory access management module is connected to the host, the energy efficiency ratio controller and the memory controller, respectively. The memory controller is connected to the memory. The host continuously sends read and write commands and write data to the memory access management module, and receives read data from the memory access management module. Correspondingly, the memory access management module sends the received read and write commands and write data to the memory controller according to the new access bandwidth, that is, the number of read and write commands and write data sent to the memory according to the unit time corresponding to the new access bandwidth. The controller sends the received read and write commands and write data. Thus, the memory controller converts the read and write commands and write data sent by the memory access management module into write commands and write data and/or read commands that the memory can recognize, and sends them to the memory. Further, the memory writes the corresponding write data into the corresponding storage unit in the memory according to the received identifiable write command, and obtains the corresponding read data from the corresponding storage unit in the memory according to the received identifiable read command , and send it to the memory controller, thereby sending the read data to the host via the memory controller and the memory access management module in turn. The access request may include read and write commands and write data sent by the host.

It can be understood that the new access bandwidth can be the highest access bandwidth when the memory does not receive the memory access bandwidth reduction instruction sent by the energy efficiency ratio controller again, that is, when the host sends an access request to the memory access management module at a rate greater than or equal to When the rate corresponding to the new access bandwidth, the memory access management module may send an access request to the memory controller with the new access bandwidth; when the rate at which the host sends an access request to the memory access management module is less than the rate corresponding to the new access bandwidth, the memory access The access management module can send the access request to the memory controller with a bandwidth corresponding to the rate at which the host sends the access request, that is, the memory access management module can send the access request to the memory with an access bandwidth smaller than the new access bandwidth.

In a preferred embodiment, the access request is an authorized access request. Before sending the access request to the storage according to the new access bandwidth, the method may further include: authorizing the received original access request according to a preset authorization rule, and obtaining the authorized access request. Authorize access requests.

Because the activation-precharge mechanism of the memory makes the memory access the memory in the same bank, an activation-precharge operation needs to be performed every time the accessed row is changed. Therefore, in the above-mentioned embodiment, the memory access management module can also Authorize the received original access request according to the preset authorization rules. For example, you can give priority to the row address that has been activated-precharged to access the corresponding bank, and give priority to the access that exists in the memory access management module and reaches a preset number. Authorize the original access requests of the same row address and/or give priority to the original access requests without access records, etc., so as to change the order in which the original access requests are sent to the memory by means of authorization, so that the original access requests accessing the same row address The records are sent to the memory for access at the shortest time interval as possible, reducing the number of activation-precharging needs to be performed during the memory access process, thereby reducing the power consumption and heat generated by frequent activation-precharging of the memory, and avoiding the memory temperature. Under the premise of being too high, the energy efficiency ratio of the memory is further improved. Correspondingly, in each unit time, the memory access management module can select the number of access requests corresponding to the new access bandwidth and send them to the memory controller according to the authorization sequence of each authorized access request, so that the access request can be accessed by the memory controller. The request is sent to the memory.

According to the memory access method provided by the embodiment of the present application, the memory access bandwidth reduction instruction generated by the energy efficiency ratio controller when the temperature control parameter of the memory is monitored is higher than the corresponding parameter threshold is obtained, the current access bandwidth for accessing the memory is reduced, and a new access bandwidth is obtained. bandwidth, and send an access request to the memory according to the new access bandwidth, so that the temperature of the thermometer can be prevented from being too high, and the memory can run with the required bandwidth with less power consumption, and the energy efficiency ratio of the memory can be improved.

FIG. 2a is another flowchart of a memory access method provided by an embodiment of the present application, which optimizes the memory access method shown in FIG. 1 . As shown in FIG. 2 , the method for accessing the memory may include steps S201 to S211.

In step S201, when the original access request sent by the host is received, the original access address carried in the original access request is mapped to the target access address, and step S202 or step S203 is performed, and the target access address includes the target row address and target column address. , target channel number, target pseudo-channel number and target bank address.

In this step, the original access request can be understood as an access request sent by the host, and the original access request is an unauthorized access request. The target bank address of the original access request can be understood as the bank address of the physical bank that transmits the original access request. The memory can be set with multiple channels, each channel can be set with multiple (eg 2) pseudo-channels, and each pseudo-channel can be set with multiple banks. At the same time, a bank can be used to transmit an access request. Therefore, through the target channel number, target pseudo channel number and target bank address of the original access request, the bank that transmits the original access request can be uniquely located.

Referring to FIG. 2b, only row address, column address and bank address pair are used for addressing in the related art. In this embodiment of the present application, the memory access management module further introduces a channel number and a pseudo-channel number for addressing, and connects the independent storage spaces of the pseudo-channels of the memory to form a complete and continuous storage space. For example, when the memory is HBM, the independent storage spaces of 16 pseudo-channels of HBM can be linked together to form a complete continuous storage space. Therefore, the range of memory addresses can be expanded, and the probability that the same bank address in a dummy channel is frequently switched to access different data rows in the memory can be reduced, thereby reducing the probability of activation-precharge occurring. Referring to Figure 2c, the memory access management module can group the storage space of the memory according to row addresses. Each group is addressed by channel number, pseudo channel number, bank address and column address, and different groups are distinguished by row address.

The mapping method for mapping the historical access address carried in the original access request to the target access address can be selected as needed, as long as each bank of the memory can be used to transmit the access request, which is not limited in this embodiment of the present application.

In a preferred embodiment, it is assumed that the memory has ^2j channels, ^2k pseudo-channels, ^2m -21 banks, and there are ^2lk columns in the storage space of the ^memory , the original access address has n bits in total, j, k , l, m and n are all positive numbers, and j≥1, k≥j+1, l≥k+1, m≥l+1, n≥m. The 1st to jth bits in the original access address carried in the received original access request can be mapped to the target channel number, and the j+1st to kth bits of the original access address are mapped to the target pseudo channel number of the memory, Map the k+1 to lth bits in the original access address to the target column address; map the l+1 to mth bits in the original access address to the target bank address, and map the mth bit in the original access address to the target bank address The +1~n bits are mapped to the target row address, so as to map the consecutive original access addresses to different pseudo-channels, diluting the continuous access to the storage space in the same pseudo-channel, thereby further reducing the synchronization in each pseudo-channel of the memory. The probability of frequent line feed access of a bank to further mitigate the effects of the activation-precharge mechanism, improve the energy efficiency ratio of the memory, and reduce the heat generated by the memory.

Taking the memory as HBM as an example, when performing address mapping, the memory access management module can map the 1st to 3rd bits in the original access address carried in the received original access request to the target channel number, and the original access address can be mapped to the target channel number. The 4th bit in is mapped to the target pseudo-channel number, the 5th-9th bits in the original access address are mapped to the target column address, the 10th-13th bits in the original access address are mapped to the target bank address, and the The remaining unmapped addresses in the original orientation address are mapped as target row addresses.

It should be noted that the above preferred embodiment does not map the order of the target channel number, target pseudo channel number and target column address (that is, the bits corresponding to the target channel number, target pseudo channel and target column address in the original access address are in the original original address. The order in the access address) is restricted, and it is only necessary to ensure that the bit corresponding to the target bank address in the original access address is located at the end of the original access address.

In step S202, if there is a first historical access request in the historical access record of the memory, the original access request is authorized to obtain an authorized access request, and step S208 is executed, the historical row address of the first historical access request and the target row address Similarly, the historical access record is set to record the historical access request of the last transfer of each bank.

In this step, the historical row address can be understood as the row address requested by the historical access request. In the historical access record, the channel number, pseudo-channel number and bank address are used as an index, and the row address is the value corresponding to the index. Correspondingly, each channel number, pseudo-channel number and bank address, as well as the corresponding channel number, pseudo-channel number and bank are recorded. The row address of the historical access request of the last transfer of the bank to which the address is located, as shown in Figure 2d, the maximum number of historical access requests recorded in the historical access record can be equal to the number of banks set in the memory.

Since the historical access record records the historical access request of the last transmission of each bank in the memory before the current moment, if the historical access record of the memory has the same historical row address as the target row address of the original access record sent by the host, the first When a historical access request is made, it means that there is a bank that accesses the target row corresponding to the target row address at the current moment in the memory, and the target row has been activated-precharged. At this time, the target row address is accessed again, and it may not be necessary to perform the operation on the target row. Active-precharge processing. Therefore, when there is a first historical access request whose historical row address is the same as the target row address of the original access request sent by the host in the historical access record, the historical access request can be authorized preferentially, so as to avoid the need to perform the target row address again. Active-precharge condition reduces power consumption and temperature during memory accesses.

Exemplarily, after mapping the original access address carried in the received original access request to the target access address, the memory access management module inquires whether there is a history in the historical access record that is the same as the target row address in the target access address. If yes, the original access request is directly authorized as an authorized access request without waiting for the preset time length.

In step S203, if there is no first historical access request in the historical access record of the memory, it is judged whether there is a second historical access request in the historical access record, if not, step S204 is performed; The historical channel number of the second historical access request is the same as the target channel number, the historical pseudo channel number of the second historical access request is the same as the target pseudo channel number, and the historical bank address of the second historical access request is the same as the target bank address.

When there is no first historical access request whose historical access address is the same as the target access address of the received original access request in the historical access record, it can be further judged whether there is a historical channel number, historical pseudo channel number and historical access record in the historical access record A second historical access request whose bank address is the same as the target channel number, target pseudo-channel number and target bank address of the original access request respectively, that is, it is judged whether there is a historical access request transmitted by the bank corresponding to the original access request in the historical access record. . When there is a second historical access request in the historical access record, since the historical row address of the second historical access request is different from the target row address of the original access request, the bank needs to use the bank to transmit the original access request. The target row address is activated-precharged. Therefore, the original access request can be temporarily not authorized at this time, and step S204 is executed; when the second historical access request does not exist in the historical access record, it means that the historical access record does not exist in the historical access record. The historical access request of the bank corresponding to the original access request (that is, the bank that transmitted the original access request), the bank is the bank accessed for the first time, at this time, whether to directly authorize the original access request or wait for a preset time length Then authorize the original access request. When transmitting the original access request, the bank needs to activate-precharge the target row accessed by the original access request (that is, the data row corresponding to the address of the target row). Therefore, this You can directly authorize the original access request as an authorized access request without waiting, to ensure that there will be no blocking.

Exemplarily, when the historical access record of the memory does not have the first historical access request with the same historical row address as the target row address of the original access request, the memory access management module determines whether there is a historical access record in the historical access record with the same historical channel number as the original access request. For the third historical access request with the same target channel number of the access request, if the third historical access request does not exist in the historical access record, it is determined that there is no second historical access request in the historical access record, and step S204 is executed; if the historical access record does not exist in the third historical access request There is a third historical access request in the third historical access request, then continue to judge whether there is a fourth historical access request with the same historical pseudo-channel number and the target pseudo-channel number of the original access request in the third historical access request. Four historical access requests, it is determined that there is no second historical access request in the historical access record, and step S204 is executed; if there is a fourth historical access request in the historical access record, it is further judged whether there is a historical bank in the fourth historical access request For the second historical access request whose address is the same as the target bank address of the original access record request, if yes, go to step S205; if not, go to step S204.

In step S204, the original access request is authorized to obtain an authorized access request, and step S208 is performed.

The method of authorizing the unauthorized access request (including the original access request) can be selected as needed. For example, the unauthorized access request can be authorized as an authorized access request by adding an authorization identifier; Adding to the end of the authorized access request queue authorizes unauthorized access requests as authorized access requests. Correspondingly, when the memory access management module sends the authorized access request to the memory controller, it can select from the authorized access request queue according to the order in which each authorized access request in the authorized access request queue is added to the authorized access request queue. The authorized access request is obtained from the server and sent, and after the sending is completed, the authorized send request that has been sent to the memory controller is removed from the authorized access request queue.

In step S205, it is judged whether there are target unauthorized access requests with a quantity greater than or equal to the preset number threshold, if so, go to step S206; if not, go to step S207, the row address of the target unauthorized access request and the target row address same.

In step S206, each target unauthorized access request is authorized in sequence according to the set order, and an authorized access request is obtained, and step S208 is executed.

When there is a preset number of unauthorized access requests in the memory access management module, the target row address is the same as the target row address of the original access request, if so, the original access request and the target access address in the memory access management module can be the same as the Unauthorized access requests with the same target access address of the original access request are determined as target access requests, and each target access request is directly authorized in turn, so as to improve the ability to activate the same bank once. After precharging, multiple target bank addresses can be sent. The same probability of authorized access requests, thereby further reducing the number of activation-precharges that need to be performed during access to the memory. The preset number threshold can be set as required, for example, the preset number threshold can be set to an integer greater than or equal to 12; the authorization order can be set as required, such as random or in the order of the receiving time of each target access request from early to late. Each target access request is authorized, which is not limited in this embodiment of the present application.

In step S207, after a preset time period, the original access request is authorized to obtain an authorized access request.

Exemplarily, when the memory access management module sends an authorized access request to the memory, it can judge in real time the earliest received unauthorized access among the unauthorized access requests (including the original access request) that the storage access management module has received. Whether the request has passed the preset time length from its receiving time, that is, it is judged whether the earliest received unauthorized access request has stayed in the storage access management module for a preset time length; The authorized access request is authorized as an authorized access request; if not, the earliest received unauthorized access request will not be authorized until it stays in the memory access management module for a preset length of time or the earliest received unauthorized access request until the request is identified as a target unauthorized access request.

In step S208, the historical access record is updated based on the authorized access address, and step S201 or step S209 is performed.

Exemplarily, after the memory access management module authorizes any unauthorized access request as an authorized access request or after the memory access management module sends any authorized access request to the memory controller, if the historical access record does not exist If the historical channel number, historical pseudo channel number and historical bank address are the same as the target channel number, target pseudo channel number and target bank address of the authorized access request, you can create a new record entry in the historical access record. In the record entry, the target channel number, target pseudo-channel number and target bank address of the authorized access record are used as the index, and the target row address of the authorized access record is used as the index value, and the target channel number, the target channel number and the target bank address are correspondingly recorded. The target pseudo-channel number, the target bank address, and the target row address.

In step S209, a memory access bandwidth reduction instruction from the energy efficiency ratio controller is obtained, and the memory access bandwidth reduction instruction is generated when the energy efficiency ratio controller detects that the temperature control parameter of the memory is higher than a corresponding parameter threshold.

In step S210, the current access bandwidth for accessing the memory is reduced to obtain a new access bandwidth.

In step S211, an access request is sent to the memory according to the new access bandwidth, where the access request is an authorized access request.

According to the memory access method provided by the embodiment of the present application, the access is performed by extending the address of the memory, and by preferentially authorizing the access to the original access request of the historical access request with the same historical row address and its target row address in the historical access record, and preferentially The target unauthorized access request and the original access request with the same target row address and the target row address whose number is greater than or equal to the preset number threshold locally in the memory access management module are preferentially authorized to access, which can further reduce the need for the same bank during the access process. The probability of repeated activation-precharging reduces the power consumption of the data access process and the heat generated by the memory, thereby further reducing the temperature of the memory and improving the energy efficiency ratio of the memory.

FIG. 3 is another flowchart of a method for accessing a memory provided by an embodiment of the present application. The method may be performed by a memory access device, which may be implemented in software and/or hardware, and which may be configured in a controller, typically an energy efficiency ratio controller. This method can be applied in scenarios where memory access is managed. As shown in FIG. 3, the access method of the memory includes the following steps S301 and S303.

In step S301, the temperature control parameters of the memory are acquired.

In this step, the memory is a controller whose temperature is managed by the energy efficiency ratio controller, which can be any controller whose temperature needs to be managed. Considering that the HBM is more prone to overheating, the memory may preferably be a high-bandwidth memory (ie, HBM), so as to further improve the energy efficiency ratio when the controller manages the power consumption of the memory. The temperature control parameter of the memory can be understood as a parameter related to the temperature of the memory, such as a parameter that causes the temperature of the memory to change and/or a parameter that can characterize the temperature change of the memory, and the like. For example, the temperature control parameter of the memory may include at least one of temperature, power consumption, and bandwidth of the memory.

Since the temperature data inside the sensor detected by the temperature sensor inside the memory can most intuitively and accurately represent the temperature change of the memory, the energy efficiency ratio controller can be directly connected to the memory to obtain the temperature inside the memory detected by the temperature sensor inside the memory. The data is used as the temperature control parameter of the memory, and the temperature of the memory is controlled based on the temperature control parameter.

However, there is a delay in obtaining the temperature of the memory monitored by the temperature sensor inside the memory, and a delay of 1s may cause an error of more than 10 degrees. For temperature management, it is inevitable that the control of the memory temperature will lag due to the temperature data transmission delay. In addition, consider that the power consumption and heat dissipation of the sensor will affect the temperature of the sensor, and the power consumption of the sensor will be affected by and not only by the bandwidth of the memory. Therefore, in a preferred embodiment, the energy efficiency ratio controller can monitor the temperature of the memory through a temperature monitor located outside the memory, so as to reduce the delay in acquiring the memory temperature and improve the timeliness of the temperature control of the memory; The bandwidth monitor monitors the bandwidth of the memory and/or monitors the power consumption of the memory through the power consumption monitor, so as to improve the accuracy of the memory temperature control result. The temperature control parameters of the memory may preferably include at least one of three parameter items of temperature, power consumption and bandwidth of the memory.

In the above preferred embodiment, taking the temperature control parameters including temperature, power consumption and bandwidth as an example, the temperature monitor is connected to the IEEE1500 interface of the memory, the power consumption monitor is connected to the power input end of the memory or is connected to the power supply of the memory, The bandwidth monitor is connected to the path between the memory access management module and the memory, and the energy efficiency ratio controller is respectively connected to the temperature monitor, the power consumption monitor, the bandwidth monitor and the memory access management module. Therefore, the temperature monitor periodically monitors the temperature of the memory according to the first monitoring period preset by the user, and sends it to the energy efficiency ratio controller; the power consumption monitor periodically monitors the memory according to the second monitoring period preset by the user. and send it to the energy efficiency ratio controller; the bandwidth monitor periodically monitors the number of write commands and read and write data on the path between the memory access management module and the memory controller according to the third monitoring cycle, so as to obtain The command rate and data rate in this monitoring period are obtained, and then the bandwidth of the memory is obtained and sent to the energy efficiency ratio controller. Correspondingly, the energy efficiency ratio controller may receive the temperature of the memory sent by the temperature monitor, the power consumption of the memory sent by the power consumption monitor, and the bandwidth of the memory sent by the bandwidth monitor to obtain temperature control parameters of the memory.

In step S302, if the temperature control parameter is higher than the corresponding parameter threshold, a memory access bandwidth reduction instruction is generated, and the memory access bandwidth reduction instruction is sent to the memory access management module, so as to control the memory access management module to reduce the memory access bandwidth reduction instruction through the memory access bandwidth reduction instruction memory access bandwidth.

In this step, when the temperature control parameter is higher than the corresponding parameter threshold, it means that the temperature of the current memory may be too high, and the temperature of the memory needs to be lowered. Therefore, when the temperature control parameter of the memory is higher than the corresponding parameter threshold, a memory access bandwidth reduction instruction can be generated, and the memory access bandwidth reduction instruction can be sent to the memory access management module, so that the memory access management module can reduce the memory access bandwidth according to the memory access bandwidth. Reduce the access bandwidth of the memory by reducing the instruction to achieve the purpose of reducing the bandwidth of the memory, so as to reduce the power consumption of the memory, thereby reducing the temperature of the memory, and can make the memory operate with a smaller power consumption. The bandwidth required to improve the energy efficiency of the memory Compare.

The way of judging whether the temperature control parameter is higher than the corresponding parameter threshold can be set as required. For example, when only one parameter item is included in the temperature control parameters of the memory, when the parameter item is higher than the parameter threshold corresponding to the parameter item, it can be determined that the temperature control parameter of the memory is higher than the corresponding parameter threshold. When the temperature control parameters of the memory include multiple parameter items, for example, when the temperature control parameters of the memory include at least two parameter items of temperature, power consumption and bandwidth of the memory, the memory may exist in each of the included parameter items When at least one parameter is higher than the parameter threshold of the corresponding parameter item, it is determined that the temperature control parameter of the memory is higher than the corresponding parameter threshold. If the control parameter is higher than the corresponding parameter threshold, this embodiment of the present application does not determine this.

In order to further improve the timeliness of temperature control of the memory, preferably, when there is a parameter item higher than the corresponding parameter threshold in the temperature control parameter of the memory, it is determined that the temperature control parameter of the memory is higher than the corresponding parameter threshold. The temperature control parameters can include three parameters: temperature, power consumption and bandwidth. If the temperature control parameter is higher than the corresponding parameter threshold, generating a memory access bandwidth reduction instruction, including: if an abnormal parameter item higher than the corresponding threshold exists in the temperature control parameter, generating a memory access bandwidth reduction instruction. That is, when the temperature control parameters of the memory include the temperature, power consumption and bandwidth of the memory, if the temperature of the memory is higher than the preset temperature threshold, the power consumption of the memory is higher than the preset power consumption threshold, and the bandwidth of the memory is higher than the preset temperature threshold When at least one of the set bandwidth thresholds is established, a memory access bandwidth reduction instruction can be generated and sent to the memory access management module. The temperature threshold, power consumption threshold and bandwidth threshold can be flexibly set by users according to their needs.

When receiving a parameter item higher than the corresponding parameter threshold, the energy efficiency ratio controller can control the memory access management module to reduce the bandwidth of the memory once; it can also control the obtained memory bandwidth and the temperature and temperature of the memory under the bandwidth. In terms of power consumption, regardless of whether the number of abnormal parameter items exceeding the corresponding parameter threshold is one or more among the three parameter items, the bandwidth of the memory is reduced only once to avoid the situation of excessive memory reduction. Preferably, before generating the memory access bandwidth reduction instruction, the method further includes: determining that the abnormal parameter item is the first acquired abnormal parameter item under the corresponding target bandwidth. The following takes this situation as an example for description.

In a preferred embodiment, determining that the abnormal parameter item is the first acquired abnormal parameter item under the corresponding target bandwidth includes: determining the bandwidth with the acquired detection time closest to the detection time of the abnormal parameter item as the same as the detection time of the abnormal parameter item. The target bandwidth corresponding to the abnormal parameter item; if the target bandwidth does not have a corresponding memory access bandwidth reduction instruction, the abnormal parameter item is determined to be the first acquired abnormal parameter item under the target bandwidth. After sending the memory access bandwidth reduction instruction to the memory access management module, the method may further include: correspondingly recording the target bandwidth and the memory access bandwidth reduction instruction.

In the above embodiment, the energy efficiency ratio controller receives the temperature of the memory sent by the temperature monitor, the power consumption of the memory sent by the power consumption monitor, and the bandwidth of the memory sent by the bandwidth monitor, and after receiving the temperature, power consumption and bandwidth When any one of the parameter items is used, judge whether the parameter item is an abnormal parameter item higher than the parameter threshold corresponding to the parameter item, if not, continue to receive the above-mentioned parameter item of the memory; if so, continue to receive the above-mentioned parameter item of the memory, And in the bandwidth that the energy efficiency ratio controller has received, determine the bandwidth whose detection time is closest to the detection time of the abnormal parameter item as the target bandwidth corresponding to the abnormal parameter item, and determine whether the target bandwidth has a corresponding memory access bandwidth. Reduce the command, if yes, it means that the energy efficiency ratio controller has already sent the memory access bandwidth reduction command under the target bandwidth. After the bandwidth is reduced, the parameter item of the memory may have changed. Therefore, the memory access bandwidth can no longer be generated and sent at this time. Reduce the command; if not, it means that the energy efficiency ratio controller has not sent the memory access bandwidth reduction command for the bandwidth, and at this time, the memory access bandwidth reduction command can be generated and sent to the memory access management module to instruct the memory access management module. Reduce memory access bandwidth.

According to the memory access method provided by the embodiment of the present application, a temperature control parameter of the memory is acquired, and when the temperature control parameter is higher than the corresponding parameter threshold, a memory access bandwidth reduction instruction is generated and sent to the memory access management module to instruct the memory management The module reduces the access bandwidth of the memory, so that when the memory temperature is high, the temperature of the memory can be reduced to avoid the overheating of the memory, thereby prolonging the service life of the memory; and because the memory is reduced by reducing the access bandwidth of the memory. The temperature can also enable the memory to run the required bandwidth with less power consumption, and improve the energy efficiency ratio of the memory.

FIG. 4 is a structural block diagram of an apparatus for accessing a memory provided by an embodiment of the present application. As shown in FIG. 4 , the apparatus includes an instruction obtaining unit 401 , a bandwidth reducing unit 402 and a request sending unit 403 .

The instruction acquisition unit 401 is configured to acquire a memory access bandwidth reduction instruction from the energy efficiency ratio controller, and the memory access bandwidth reduction instruction is generated when the energy efficiency ratio controller detects that the temperature control parameter of the memory is higher than a corresponding parameter threshold.

The bandwidth reducing unit 402 is configured to reduce the current access bandwidth for accessing the memory to obtain a new access bandwidth.

The request sending unit 403 is configured to send an access request to the memory according to the new access bandwidth.

According to the memory access device provided by the embodiment of the present application, the instruction acquisition unit 401 acquires the memory access bandwidth reduction instruction generated by the energy efficiency ratio controller when the temperature control parameter of the memory is monitored to be higher than the corresponding parameter threshold, and the bandwidth reduction unit 402 reduces the memory access bandwidth instruction. The current access bandwidth of the memory is accessed to obtain a new access bandwidth, and an access request is sent to the memory according to the new access bandwidth through the request sending unit 403, so that the temperature of the thermometer can be prevented from being too high, and the memory can be made with less power. It consumes the bandwidth required for operation and improves the energy efficiency ratio of the memory.

In an exemplary embodiment, reducing the current access bandwidth of the memory may include: reducing the current access bandwidth of the memory by a preset bandwidth step size.

In an exemplary embodiment, the access request is an authorized access request, and the device for accessing the memory may further include: an authorization unit, configured to, before sending the access request to the memory according to the new access bandwidth, perform an authorization request on the receiving device according to a preset authorization rule. The original access request received is authorized, and the authorized access request is obtained.

In an exemplary embodiment, the authorization unit may be configured to: when receiving the original access request sent by the host, map the original access address carried in the original access request to the target access address, where the target access address includes the target row address , target column address, target channel number, target pseudo-channel number and target bank address; and, if there is a first historical access request in the historical access record of the memory, directly authorize the original access request to obtain an authorized access request, the first The historical row address of a historical access request is the same as the target row address, and the historical access record is set to record the historical access request of the last transmission of each bank.

In an exemplary embodiment, the authorization unit may be further configured to: if the first historical access request does not exist in the historical access record of the memory, determine whether there is a second historical access request in the historical access record, and the second historical access request exists in the historical access record. The requested historical channel number is the same as the target channel number, the historical pseudo channel number of the second historical access request is the same as the target pseudo channel number, and the historical bank address of the second historical access request is the same as the target bank address; and, if the historical access record If there is no second historical access request, the original access request is authorized to obtain the authorized access request.

In an exemplary embodiment, the authorization unit may be further configured to: if there is a second historical access request in the historical access record, determine whether there is a local target unauthorized access request with a quantity greater than or equal to a preset quantity threshold, and if so , then authorize each target unauthorized access request in turn according to the set order, and obtain the authorized access request; if not, after the preset time length, authorize the original access request, obtain the authorized access request, and the target is not authorized The row address of the access request is the same as the target row address.

In an exemplary embodiment, the access device of the memory may further include: a record updating unit configured to update the historical access record based on the access address of the authorized access after obtaining the authorized access request.

The foregoing apparatus is used to execute the memory access method provided by the embodiment of the present application, and has corresponding functional modules and corresponding technical effects.

FIG. 5 is a structural block diagram of an apparatus for accessing a memory provided by an embodiment of the present application. As shown in FIG. 5 , the apparatus includes a parameter obtaining unit 501 and an instruction sending unit 502 .

The parameter obtaining unit 501 is configured to obtain temperature control parameters of the memory.

The instruction sending unit 502 is configured to generate a memory access bandwidth reduction instruction when the temperature control parameter is higher than the corresponding parameter threshold, and send the memory access bandwidth reduction instruction to the memory access management module, so as to control the memory access through the memory access bandwidth reduction instruction The management module reduces the memory access bandwidth.

According to the memory access device provided by the embodiment of the present application, the temperature control parameter of the memory is obtained through the parameter obtaining unit 501, and the instruction sending unit 502 generates and sends the temperature control parameter to the memory access management module when the temperature control parameter is higher than the corresponding parameter threshold. The memory access bandwidth reduction instruction is used to instruct the memory management module to reduce the access bandwidth of the memory, so that when the memory temperature is high, the temperature of the memory can be reduced to prevent the memory from overheating, thereby extending the service life of the memory; By reducing the access bandwidth of the memory, the temperature of the memory can be reduced, and the bandwidth required for the memory to operate with less power consumption can be improved, thereby improving the energy efficiency ratio of the memory.

In an exemplary embodiment, the temperature control parameter includes three parameter items, namely temperature, power consumption and bandwidth, and the instruction sending unit 502 may be configured to: if there is an abnormal parameter item in the temperature control parameter that is higher than the corresponding threshold, generate The memory access bandwidth reduction instruction is sent to the memory access management module.

In an exemplary embodiment, the instruction sending unit 502 may be further configured to: before generating the memory access bandwidth reduction instruction, determine that the exception parameter item is the first acquired exception parameter item under the corresponding target bandwidth.

In an exemplary embodiment, determining that the abnormal parameter item is the first acquired abnormal parameter item under the corresponding target bandwidth includes: determining the bandwidth with the acquired detection time closest to the detection time of the abnormal parameter item as The target bandwidth corresponding to the abnormal parameter item; and, if the target bandwidth does not have a corresponding memory access bandwidth reduction instruction, the abnormal parameter item is determined to be the abnormal parameter item obtained first under the target bandwidth.

After sending the memory access bandwidth reduction instruction to the memory access management module, the apparatus may also be configured to: record the target bandwidth and the memory access bandwidth reduction instruction correspondingly.

The foregoing apparatus is used to execute the memory access method provided by the embodiment of the present application, and has corresponding functional modules and corresponding technical effects.

The embodiment of the present application also provides a memory access management module. FIG. 6 is a schematic structural diagram of a memory access management module provided by an embodiment of the present application. As shown in FIG. 6 , the memory access management module includes a processing device 61 and a storage device 62; the number of processing devices 61 in the memory access management module can be There are one or more, and a processing device 61 is used as an example in FIG. 6 ; the processing device 61 and the storage device 62 in the memory access management module can be connected through a bus or other methods, and the connection through a bus is used as an example in FIG. 6 .

As a computer-readable storage medium, the storage device 62 may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the memory access method in the embodiments of the present application. The processing device 61 executes various functional applications and data processing of the memory access management module by running the software programs, instructions and modules stored in the storage device 62 , ie, implements the above-mentioned memory access method.

The storage device 62 may mainly include a program storage area and a data storage area. The stored program area may store an operating system, an application program required for at least one function; the stored data area may store data created according to the use of the terminal, and the like. Additionally, storage device 62 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage device 62 may further include memory located remotely relative to processing device 61, and these remote memories may be connected to the memory access management module through a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The embodiments of the present application also provide an energy efficiency ratio controller. FIG. 7 is a schematic structural diagram of an energy efficiency ratio controller provided by an embodiment of the present application. As shown in FIG. 7 , the energy efficiency ratio controller includes a processing device 71 and a storage device 72; the number of processing devices 71 in the energy efficiency ratio controller can be There are one or more, and a processing device 71 is taken as an example in FIG. 7 ; the processing device 71 and the storage device 72 in the energy efficiency ratio controller can be connected by a bus or other means, and the connection by a bus is taken as an example in FIG. 7 .

As a computer-readable storage medium, the storage device 72 can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the memory access method in the embodiments of the present application. The processing device 71 executes various functional applications and data processing of the energy efficiency ratio controller by running the software programs, instructions, and modules stored in the storage device 72 , ie, implements the above-mentioned memory access method.

The storage device 72 may mainly include a storage program area and a storage data area. The stored program area may store an operating system, an application program required for at least one function; the stored data area may store data created according to the use of the terminal, and the like. Additionally, storage device 72 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device 72 may further include memories located remotely from the processing device 71, and these remote memories may be connected to the energy efficiency ratio controller through a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The embodiment of the present application also provides a memory access system. FIG. 8 is a schematic structural diagram of a memory access system provided by an embodiment of the present application. As shown in FIG. 8 , the system includes the memory access management module 1 and the energy efficiency ratio controller 2 provided by the embodiment of the present application, and also includes a temperature monitor 3 , a power consumption monitor 4 and a bandwidth monitor 5 .

The temperature monitor 3 , which is respectively connected to the memory 6 and the energy efficiency ratio controller 2 , is configured to monitor the temperature of the memory according to the first monitoring period, and send the monitored temperature to the energy efficiency ratio controller 2 .

The power consumption monitor 4 is respectively connected to the memory 6 and the energy efficiency ratio controller 2 , and is configured to monitor the power consumption of the memory according to the second monitoring period, and send the monitored power consumption to the energy efficiency ratio controller 2 .

The bandwidth monitor 5 is respectively connected with the memory access management module 1, the memory controller 7 connected to the memory 6, and the energy efficiency ratio controller 2, and is set to monitor the bandwidth of the memory according to the third monitoring period, and send the monitored bandwidth to To the energy efficiency ratio controller 2.

The energy efficiency ratio controller 2, connected to the memory access management module 1, is set to obtain temperature control parameters of the memory, the temperature control parameters including temperature, power consumption and bandwidth; if the temperature control parameters are higher than the corresponding parameter thresholds, a memory access is generated A bandwidth reduction instruction is sent, and the memory access bandwidth reduction instruction is sent to the memory access management module 1, so as to control the memory access management module 1 to reduce the access bandwidth of the memory 6 through the memory access bandwidth reduction instruction.

The memory access management module 1 is connected to the host 8 and the memory controller 7 respectively, and is configured to obtain the memory access bandwidth reduction instruction from the energy efficiency ratio controller 2, and the memory access bandwidth reduction instruction is monitored by the energy efficiency ratio controller 2. Generated when the temperature control parameter is higher than the corresponding parameter threshold; reduce the current access bandwidth for accessing the memory 6 to obtain a new access bandwidth; send an access request to the memory 6 according to the new access bandwidth.

The memory access system provided by the embodiment of the present application is used to execute the memory access method provided by the embodiment of the present application, and has corresponding functional modules and corresponding technical effects.

The embodiments of the present application further provide a computer-readable storage medium containing computer-executable instructions, and the computer-executable instructions, when executed by a processor, are used to execute the memory access method provided by the embodiments of the present application.

From the above description of the embodiments, those skilled in the art can understand that the present application can be implemented by means of software and general hardware, and can also be implemented by hardware. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a floppy disk of a computer, a read-only memory (Read-Only Memory, ROM), Random Access Memory (Random Access Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute any methods described in the examples.

The above descriptions are merely exemplary embodiments of the present application, and are not intended to limit the protection scope of the present application.

The block diagrams of any logic flow in the figures of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. Computer programs can be stored on memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical memory devices and systems (Digital Versatile Discs). DVD or CD disc) etc. Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable for the local technical environment, such as, but not limited to, a general purpose computer, a special purpose computer, a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC) ), Programmable Logic Device (PLD), Field Programmable Gate Array (Field Programmable Gate Array, FGPA) and processors based on multi-core processor architecture.

The foregoing has provided a detailed description of exemplary embodiments of the present application, by way of illustrative and non-limiting example. However, when considered in conjunction with the accompanying drawings and claims, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art without departing from the scope of the present application. Accordingly, the proper scope of this application will be determined with reference to the claims.

Claims (14)

1. A memory access method, comprising:

   obtaining a memory access bandwidth reduction instruction from an energy efficiency ratio controller, where the memory access bandwidth reduction instruction is generated when the energy efficiency ratio controller detects that a temperature control parameter of the memory is higher than a corresponding parameter threshold;

   reducing the current access bandwidth to the memory to obtain a new access bandwidth; and

   An access request is sent to the memory according to the new access bandwidth.
2. The method of claim 1, wherein reducing the current access bandwidth of the memory comprises:

   Decreasing the current access bandwidth of the memory by a preset bandwidth step.
3. The method of claim 1, wherein the access request is an authorized access request; and

   Before sending the access request to the memory according to the new access bandwidth, the method further includes:

   Authorize the received original access request according to the preset authorization rule, and obtain the authorized access request.
4. The method according to claim 3, wherein authorizing the received original access request according to the preset authorization rule to obtain the authorized access request, comprising:

   In response to receiving the original access request sent by the host, the original access address carried in the original access request is mapped to a target access address, where the target access address includes a target row address, a target column address, a target channel number, a target access address Pseudo channel number and target bank address; and

   In response to the existence of the first historical access request in the historical access record of the memory, the original access request is authorized, and the authorized access request is obtained, the historical row address of the first historical access request and the target row are obtained. The addresses are the same, and the historical access record is set to record the historical access request of the last transmission of each bank.
5. The method of claim 4, further comprising:

   In response to the absence of the first historical access request in the historical access record of the memory, determine whether there is a second historical access request in the historical access record, the historical channel number of the second historical access request and the target The channel numbers are the same, the historical pseudo channel number of the second historical access request is the same as the target pseudo channel number, and the historical bank address of the second historical access request is the same as the target bank address;

   In response to the absence of a second historical access request in the historical access record, authorizing the original access request to obtain the authorized access request; and

   In response to the existence of the second historical access request in the historical access record, it is determined whether there are target unauthorized access requests with a quantity greater than or equal to a preset number threshold, and if so, then the target unauthorized access requests are sequentially performed according to the set order. The authorized access request is authorized, and the authorized access request is obtained; if not, after a preset time period, the original access request is authorized to obtain the authorized access request, and the target unauthorized access request is The row address is the same as the target row address.
6. The method according to any one of claims 4-5, after obtaining the authorized access request, further comprising:

   The historical access record is updated based on the access address of the authorized access.
7. A memory access method, comprising:

   Get the temperature control parameters of the memory;

   generating a memory access bandwidth reduction instruction in response to the temperature control parameter being above a corresponding parameter threshold; and

   The memory access bandwidth reduction instruction is sent to a memory access management module, so as to control the memory access management module to reduce the memory access bandwidth through the memory access bandwidth reduction instruction.
8. The method according to claim 7, wherein the temperature control parameters include three parameter items of temperature, power consumption and bandwidth, said; and

   In response to the temperature control parameter being higher than the corresponding parameter threshold, generating the memory access bandwidth reduction instruction includes:

   The memory access bandwidth reduction instruction is generated in response to the presence of an abnormal parameter item in the temperature control parameter that is higher than a corresponding threshold.
9. The method of claim 8, before generating the memory access bandwidth reduction instruction, further comprising:

   It is determined that the abnormal parameter item is the first acquired abnormal parameter item under the corresponding target bandwidth.
10. The method of claim 9, wherein,

    Determining that the abnormal parameter item is the first acquired abnormal parameter item under the corresponding target bandwidth includes: determining the bandwidth with the acquired detection time closest to the detection time of the abnormal parameter item as the target bandwidth corresponding to the abnormal parameter item; and, in response to the target bandwidth not having a corresponding memory access bandwidth reduction instruction, determine that the abnormal parameter item is the abnormal parameter item first obtained under the target bandwidth; as well as

    After sending the memory access bandwidth reduction instruction to the memory access management module, the method further includes: correspondingly recording the target bandwidth and the memory access bandwidth reduction instruction.
11. A memory access management module, comprising: a storage device, a processing device, a program stored on the storage device and executable on the processing device, and a program for realizing the connection between the processing device and the storage device A communication data bus, when the program is executed by the processing device, implements the memory access method according to any one of claims 1-6.
12. An energy efficiency ratio controller, comprising: a storage device, a processing device, a program stored on the storage device and executable on the processing device, and a connection for realizing the processing device and the storage device A communication data bus, when the program is executed by the processing device, implements the memory access method according to any one of claims 7-10.
13. A memory access system, comprising the memory access management module according to claim 11 and the energy efficiency ratio controller according to claim 12, further comprising a temperature monitor, a power consumption monitor and a bandwidth monitor;

    the temperature monitor, which is respectively connected to the memory and the energy efficiency ratio controller, is configured to monitor the temperature of the memory according to a first monitoring period, and sends the monitored temperature to the energy efficiency ratio controller;

    The power consumption monitor, which is respectively connected to the memory and the energy efficiency ratio controller, is configured to monitor the power consumption of the memory according to a second monitoring period, and send the monitored power consumption to the energy efficiency ratio controller ;

    The bandwidth monitor is respectively connected to the memory access management module, the memory controller connected to the memory, and the energy efficiency ratio controller, and is configured to monitor the bandwidth of the memory according to a third monitoring period, and monitor the bandwidth of the memory according to the third monitoring period. sending the monitored bandwidth to the energy efficiency ratio controller;

    The energy efficiency ratio controller, connected to the memory access management module, is configured to obtain temperature control parameters of the memory, the temperature control parameters including temperature, power consumption and bandwidth; in response to the temperature control parameters being higher than corresponding parameter threshold, generate a memory access bandwidth reduction instruction, and send the memory access bandwidth reduction instruction to a memory access management module, so as to control the memory access management module to reduce the memory access bandwidth through the memory access bandwidth reduction instruction; as well as

    The memory access management module, respectively connected to the host and the memory controller, is configured to obtain a memory access bandwidth reduction instruction from the energy efficiency ratio controller, and the memory access bandwidth reduction instruction is monitored by the energy efficiency ratio controller. It is generated when the temperature control parameter of the memory is higher than the corresponding parameter threshold; the current access bandwidth for accessing the memory is reduced to obtain a new access bandwidth; an access request is sent to the memory according to the new access bandwidth.
14. A computer-readable storage medium having one or more programs stored thereon, the one or more programs being executable by one or more processors to implement the method according to any one of claims 1-10 method.

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