WO2017173844A1 - 一种目录读取的方法、装置及系统 - Google Patents
一种目录读取的方法、装置及系统 Download PDFInfo
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- WO2017173844A1 WO2017173844A1 PCT/CN2016/109580 CN2016109580W WO2017173844A1 WO 2017173844 A1 WO2017173844 A1 WO 2017173844A1 CN 2016109580 W CN2016109580 W CN 2016109580W WO 2017173844 A1 WO2017173844 A1 WO 2017173844A1
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- WIPO (PCT)
- Prior art keywords
- request information
- directory
- read
- cache block
- cache
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0806—Multiuser, multiprocessor or multiprocessing cache systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0806—Multiuser, multiprocessor or multiprocessing cache systems
- G06F12/084—Multiuser, multiprocessor or multiprocessing cache systems with a shared cache
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for directory reading.
- each processor node includes at least one CPU, each CPU is equipped with a certain memory, and each processor node further includes at least one node controller NC, in different processor nodes
- the CPUs are connected to each other through the node controller NC to achieve mutual access to the other party's memory.
- each memory is cached with at least two directory caches corresponding to the data in the memory. After reading the data in the memory, the desired data is obtained by reading the directory cache. Storage location, read each time the in-memory directory cache is read, read at least two directories
- each read directory request corresponds to a directory cache read.
- Embodiments of the present invention provide a method, apparatus, and system for directory reading, which can reduce the delay of reading a directory operation.
- An embodiment of the present invention provides a method for directory reading, including: Receiving first request information for reading the directory cache;
- the first request information is cached in a preset buffer area, and after the second request information is acquired to the second cache block including the first directory and the second directory, And transmitting, according to the second cache block and the request information in the buffer area, at least two directories including the first directory and the second directory to the corresponding request information sending end.
- the sending according to the second cache block and the request information in the buffer area, at least two directories including the first directory and the second directory to a corresponding request Information sender includes
- the first request information is directly executed, and the first cache block including the first directory is obtained from the directory cache, according to the The first cache block and the request information in the buffer area are sent to at least one directory including the first directory to the corresponding request information sending end.
- the sending, according to the first cache block and the request information in the buffer area, the at least one directory including the first directory to the corresponding request information sending end includes:
- the request information is deleted from the buffer area.
- An embodiment of the present invention further provides a device for reading a directory, including: a receiving unit, a determining unit, a determining unit, and an executing unit;
- the receiving unit is configured to receive first request information for reading a directory cache
- the determining unit is configured to determine a first directory to be read by the first request information received by the receiving unit;
- the determining unit is configured to determine whether there is at least one second request information that is being executed, where the second directory to be read by the second request information is located in the same as the first directory determined by the determining unit On a cache block;
- the execution unit is configured to: according to the determination result of the determining unit, if yes, buffering the first request information into a preset buffer area, and performing the second request information acquisition to include the After the first directory and the second cache block of the second directory, according to the second cache block and the request information in the buffer area, at least the first directory and the second directory are included Two directories are sent to the corresponding request message sender.
- the execution unit includes: a sending subunit and a determining subunit;
- the sending subunit configured to acquire the second directory from the second cache block, and send the second directory to the request information sending end corresponding to the second request information
- the determining subunit is configured to determine, according to each request information in the buffer area, whether a directory to be read by the request information is in the second cache block;
- the sending subunit is further configured to send, according to the determination result of the determining subunit, the directory to be read by the request information to the request information sending end corresponding to the request information.
- the executing unit is further configured to: according to the determination result of the determining unit, if the first request information is directly executed, obtain the first directory including the first directory from the directory cache. And a cache block, according to the first cache block and the request information in the buffer area, sending at least one directory including the first directory to a corresponding request information sending end.
- the execution unit includes: a sending subunit and a determining subunit;
- the sending subunit configured to acquire the first directory from the first cache block, and use the first directory Recording the request information sending end corresponding to the first request information;
- the determining subunit configured to determine, according to each request information in the buffer area, whether a directory to be read by the request information is in the first cache block;
- the sending subunit is further configured to send, according to the determination result of the determining subunit, the directory to be read by the request information to the request information sending end corresponding to the request information.
- the embodiment of the present invention further provides a system for reading a directory, including: a request information response end, at least one request information sending end, and any device for reading the directory provided by the embodiment of the present invention;
- the request information response end is configured to store the directory cache
- the request information sending end is configured to send request information to a receiving unit in the device that reads the directory, and receive a directory sent by an execution unit in the device that reads the directory.
- An embodiment of the present invention provides a method, an apparatus, and a system for reading a directory. Since a directory is read from a directory cache in the form of a cache block, each cache block includes at least two directories, if newly received. The first directory to be read by the request information is on the same cache block as the second directory to be acquired by the second request information currently being executed, and the second cache block to which the second request information is read is included in the second cache block. a directory, the first request information is not required to be executed again to read the first directory, and the directory to be read by the plurality of request information is obtained by reading the directory cache at a time, thereby reducing the bandwidth occupation for reading the directory cache. Thereby reducing the delay in reading the directory operation.
- FIG. 1 is a flowchart of a method for reading a directory according to an embodiment of the present invention
- FIG. 2 is a flowchart of a method for processing request information according to an embodiment of the present invention
- FIG. 3 is a flowchart of a method for processing a cache block according to an embodiment of the present invention
- 4 is a schematic diagram of a device for reading a directory according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of a device for reading a directory according to another embodiment of the present invention.
- FIG. 6 is a schematic diagram of a system for directory reading according to an embodiment of the present invention.
- an embodiment of the present invention provides a method for directory reading, which may include the following steps:
- Step 101 Receive first request information for reading a directory cache.
- Step 102 Determine a first directory to be read by the first request information
- Step 103 determining whether there is at least one second request information being executed, where the second directory to be read by the second request information is located on the same cache block as the first directory, and if yes, executing Step 104;
- Step 104 Cache the first request information into a preset buffer area, and after the second request information is acquired to the second cache block including the first directory and the second directory, And transmitting, according to the second cache block and the request information in the buffer area, at least two directories including the first directory and the second directory to the corresponding request information sending end.
- An embodiment of the present invention provides a directory reading method. Since a directory is read from a directory cache in the form of a cache block, each cache block includes at least two directories, and if the newly received first request information is required, The first directory to be read is on the same cache block as the second directory to be acquired by the second request information currently being executed, and the first directory is included in the second cache block to which the second request information is read. The first request information is executed again to read the first directory, and the directory to be read by the plurality of request information is obtained by reading the directory cache at a time, thereby reducing the bandwidth occupation of reading the directory cache, thereby reducing the reading. Delay in directory operations.
- the second directory is obtained from the second cache block.
- the second directory is sent to the request information sending end corresponding to the second request information, and on the other hand, it is sequentially determined whether the directory to be read by each request information in the buffer area is on the second cache block, and if so, the directory to be read is sent. Give the corresponding request information sender.
- each request information is executed, under the premise of ensuring completion of the request information, other request information that can be replaced by the execution of the request information is determined, and the utilization of each request information is maximized, and multiple request information are combined. Execution, reducing the bandwidth usage of directory cache access, increasing the speed of reading, thereby reducing the latency of reading directory operations.
- the directory to be read by each request information being executed is not on the same cache block as the first directory, the first request information is directly executed, and the read from the directory cache is included.
- the first cache block of the first directory sends the first directory to the request information sending end corresponding to the first request information, and sends the directory included in the first cache block and which is to be read by each request information in the buffer to Corresponding request information sender.
- the directory to be read by the newly received request information and the directory to be read by each request information being executed are not on the same cache block, and the newly received request information is directly executed to ensure that each request information is Can be obtained and executed to ensure the feasibility of the directory reading method.
- the processing sends the first directory to the request information corresponding to the first request information.
- the obtained cache block will be matched with the request information in the cache area, ensuring that the read and read of the directory cache is maximized every time, further reducing the directory cache.
- the bandwidth usage of the read port is further reduced, thereby further reducing the delay of reading the directory operation and improving the efficiency of reading the directory.
- the directory to be read by the request information is sent to the request information.
- the request information is deleted from the buffer area to avoid multiple matching of the same request information and repeatedly sending the directory to be read, thereby causing waste of system resources. Health, improve the rationality of the directory reading method.
- the method for reading a directory provided by the embodiment of the present invention includes two aspects, namely, a method for processing request information on the one hand, and a method for processing a cache block on the other hand, in order to enable the embodiment of the present invention.
- the technical solution is more clear. The following describes the memory of the above two aspects separately.
- an embodiment of the present invention provides a method for processing request information, including
- Step 201 Receive request information for reading the directory cache.
- a server including a plurality of processor nodes
- the directory cache corresponding to the in-memory data receives the request information for reading the directory cache sent by each CPU.
- one server includes three processor nodes, which are processor node 1 to processor node 4, respectively.
- processor node 1 wants to read data in memory 1 on processor node 2
- the CPU 1 first needs to read the directory cache of the memory 1 to acquire the address of the data 1, so that the CPU 1 transmits the request information 1 for reading the directory cache stored in the memory 1.
- Step 202 Determine a target directory to be read by the request information.
- the request information is analyzed to determine a target directory to be read by the request information.
- the request information 1 is parsed, and it is determined that the target directory to be read by the request information 1 is the directory 1 corresponding to the data 1.
- Step 203 Determine whether there is at least one directory to be read that is to be executed, and the directory to be read is located in the same cache block as the target directory. If yes, go to step 206, otherwise go to step 204.
- step 204 After acquiring the target directory to be read by the newly received request information, matching the newly received request information with each request information currently being executed, determining whether at least The directory to be read by the request information being executed is located on the same cache block as the target directory, and if so, the cache block including one of the request information being executed includes the target directory. Recording, there is no need to execute the newly received request information again, and step 206 is performed accordingly; if not, it indicates that the target directory is not included in the cache block read by each request information currently being executed, and the target directory needs to be read separately. Take the corresponding execution step 204.
- step 204 is performed for the request information 1; if the directory 2 to be read by the request information 2 is located on the same cache block as the directory 1, the step 206 is performed for the request information 1.
- Step 204 Perform the request information directly.
- the request information 3 and the directory to be read by the request information 4 are not on the same cache block as the directory 1, the request information 1 is executed, and the directory cache stored in the memory 1 is read. take.
- Step 205 Acquire a cache block including the target directory, and end the current process.
- a cache block including the directory to be read by the request information is read from the directory cache.
- the cache block 1 including the directory 1 is read from the directory cache stored in the memory 1, and the cache block 1 includes the directory 2 to the directory 32 in addition to the directory 1.
- Step 206 Cache the request information into the buffer area.
- the request information corresponding to the target directory is cached in the buffer area.
- an embodiment of the present invention provides a method for processing a cache block, including: [0077] Step 301: Parse a cache block to obtain each directory included. [0078] In an embodiment of the present invention, after executing a request message, reading a cache block including a directory to be read by the request information from a directory cache, parsing the read cache block, and obtaining the request The various directories included in the cache block.
- the request information is executed, the cache block 1 is read from the directory cache in the memory 1, and the cache block 1 is parsed, and 32 blocks included in the cache block 1 are obtained. Directory, directory 1 to directory 32, respectively.
- Step 302 Send a directory to be read by reading the request information corresponding to the cache block to the request information sending end corresponding to the request information.
- the directory to be read by the request information obtained by acquiring the cache block is sent to the request information sending end corresponding to the request information, and is completed.
- the task of requesting information to be read by the directory cache is completed.
- the directory 1 to be read by the request information 1 corresponding to the execution of the cache block 1 is sent to the sender of the request information 1, that is, to the processor node.
- CPU1 obtains the storage address of data 1.
- Step 303 Determine whether the directory to be read by each request information in the buffer area is sequentially on the cache block. If yes, go to step 304, otherwise, end the current process.
- the buffer area includes 2 request information, respectively request information 1 and request information 5, and sequentially determining request information 1 and request information. 5 Whether the directory to be read is in the 32 directories of the directory 1 to the directory 32, wherein the directory to be read by the request information 1 is the directory 1, which is the same as the directory 1 in the cache block 2, and the step 304 is performed for the request information 1.
- the directory to be read by the request information 5 is the directory 50, and the directory included in the cache block 2 does not include the directory 50.
- Step 304 Send the directory to be read to the corresponding request information sending end.
- step 301 The obtained directory includes the directory to be read by the request information, and the directory to be read by the request information is sent to the request information sending end corresponding to the request information.
- the directory 1 is sent to the request information sending end corresponding to the request information 1, that is, the directory 1 is sent to CPU 1 in processor node 1.
- Step 305 The request information corresponding to the sent directory is deleted from the cache area.
- the request information is cached. Deleted in the area.
- the execution request information 1 obtains the cache block 1, obtains each directory from the cache block 1, and transmits the directory 1 to be read by the request information 1 to the CPU 1 in the processor 1. And determining whether the directory to be read by each request information in the buffer area is in each directory included in the cache block 1, and if yes, sending the directory to be read to the corresponding request information sending end, corresponding to the sent directory Request information is removed from the cache.
- the embodiment of the present invention is to explain the process of directory reading more clearly, and divide the entire directory reading process into a method for processing request information and a method for processing a cache block. During the implementation of the service, there is no strict sequence of execution steps in the embodiment shown in FIG. 2 and FIG. 3.
- An embodiment of the present invention provides a device for reading a directory, which can be implemented by software.
- a non-volatile memory is used by a CPU of a device in which it is located.
- the corresponding computer program instructions are read into memory and formed.
- the device includes: a receiving unit 401, a determining unit 402, a determining unit 403, and an executing unit 404;
- the receiving unit 401 is configured to receive first request information for reading a directory cache.
- the determining unit 402 is configured to determine that the first request information received by the receiving unit 401 is to be read.
- First directory
- the determining unit 403 is configured to determine whether there is at least one second request information that is being executed, where the second directory to be read by the second request information and the first directory determined by the determining unit 402 Located on the same cache block;
- the executing unit 404 is configured to: according to the determination result of the determining unit 403, if yes, buffering the first request information into a preset buffer area, and performing the second request information acquisition to include After the second cache block of the first directory and the second directory, according to the second cache block and the request information in the cache area, the first directory and the second directory are included At least two directories are sent to the corresponding request information sender.
- the execution unit 404 includes: a sending subunit 4041 and a judging subunit 4042;
- the sending subunit 4041 is configured to obtain the second directory from the second cache block, and send the second directory to the request information sending end corresponding to the second request information;
- the determining sub-unit 4042 is configured to determine, according to each request information in the buffer area, whether a directory to be read by the request information is in the second cache block;
- the sending subunit 4041 is further configured to send, according to the determination result of the determining subunit 4041, the directory to be read by the request information to the request information sending end corresponding to the request information.
- the executing unit 404 is further configured to: according to the determination result of the determining unit 403, if not, directly execute the first request information, and obtain, by using, the directory cache
- the first cache block of the first directory sends at least one directory including the first directory to the corresponding request information sending end according to the first cache block and the request information in the buffer area.
- the execution unit 404 includes a transmitting subunit 4041 and a judging subunit 4042;
- the sending subunit 4041 is further configured to: acquire the first directory from the first cache block, and send the first directory to a request information sending end corresponding to the first request information;
- the determining subunit 4042 is further configured to determine, for each request information in the buffer area, whether a directory to be read by the request information is in the first cache block;
- the sending subunit 4041 is further configured to: according to the judgment result of the determining subunit 4042, if Yes, the directory to be read by the request information is sent to the request information sending end corresponding to the request information.
- an embodiment of the present invention provides a system for reading a directory, including: a request information response end 601, at least one request information sending end 603, and any one of the above-mentioned embodiments. Taking device 602;
- the request information response end 601 is configured to store the directory cache
- the request information sending end 603 is configured to send the request information to the receiving unit in the device 602 of the directory reading, and receive the directory sent by the execution unit in the device 602 of the directory reading.
- the directory reading device 602 may be disposed on a node control chip connected to different processor nodes to implement efficient directory cache reading between different processor nodes, or may be set in In the CPU, to achieve efficient reading of the in-memory directory cache by the CPU.
- the method, device and system for directory reading provided by the embodiments of the present invention have at least the following beneficial effects:
- each cache block includes at least two directories, and if the newly received first request information is to be read first, The directory is on the same cache block as the second directory to be obtained by the second request information currently being executed, and the first directory is included in the second cache block to which the second request information is read, and the first request does not need to be executed again.
- the information is read to the first directory, and the directory to be read by the plurality of request information is obtained by reading the directory cache at a time, thereby reducing the bandwidth occupation of reading the directory cache, thereby reducing the delay of reading the directory operation.
- the request information for the request information directly executed, after the request information is read into the cache block, it is also determined whether the directory to be read by each request message in the buffer area is in the cache block. , The directory to be read by the matching request message is sent to the corresponding request message sender, so that each cache block is used to the maximum extent, thereby further reducing the bandwidth for reading the directory cache and improving the directory cache. The rate at which readings are made.
- the request information is sent to the request information sending end corresponding to the request information, and the request information is sent to the request information sending end corresponding to the request information. It is deleted from the cache area, which avoids the repeated matching of the completed request information and the directory to be read, which causes the system resources to be wasted, which improves the rationality of the reading method of the directory.
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CN110765086A (zh) * | 2019-10-25 | 2020-02-07 | 浪潮电子信息产业股份有限公司 | 一种小文件的目录读取方法、系统、电子设备及存储介质 |
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CN110765086B (zh) * | 2019-10-25 | 2022-08-02 | 浪潮电子信息产业股份有限公司 | 一种小文件的目录读取方法、系统、电子设备及存储介质 |
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