CN107766145B - Memory management method and device under dual systems - Google Patents
Memory management method and device under dual systems Download PDFInfo
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- CN107766145B CN107766145B CN201610688737.6A CN201610688737A CN107766145B CN 107766145 B CN107766145 B CN 107766145B CN 201610688737 A CN201610688737 A CN 201610688737A CN 107766145 B CN107766145 B CN 107766145B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5011—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resources being hardware resources other than CPUs, Servers and Terminals
- G06F9/5016—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resources being hardware resources other than CPUs, Servers and Terminals the resource being the memory
Abstract
The invention provides a memory management method and a device under a dual system, wherein the method comprises the following steps: receiving an operating system switching instruction input by a user; determining a first operating system running in a foreground and a second operating system running in a background according to an operating system switching instruction; setting a first maximum occupied memory for a first operating system and a second maximum occupied memory for a second operating system; the first maximum occupied memory is larger than the second maximum occupied memory. The memory management method under the dual-system provided by the invention controls the maximum memory occupied by the operating system to change due to different running in the foreground and the background, and avoids the operating system running in the background from occupying too much memory, thereby increasing the memory utilization rate, improving the software running smoothness of the operating system running in the foreground and improving the memory management effect.
Description
Technical Field
The present invention relates to the field of computers, and in particular, to a method and an apparatus for memory management in dual systems.
Background
With the development of computer technology, research and development personnel develop more and more software capable of running on intelligent terminals such as mobile phones and computers, and the like, so that convenience is provided for daily life and work of users. However, because resources such as a memory, a Central Processing Unit (CPU), and a memory of the intelligent terminal device are limited, the more software is run in the intelligent terminal, the more fluency of software running may be reduced.
In order to ensure the smoothness of software operation, a memory management module is usually arranged in the intelligent terminal so as to fully utilize the physical memory. And the memory management module divides the processes running in the system according to the importance degree. And when the memory resource is in shortage, the process with lower importance degree is automatically killed according to the importance degree of the process so as to achieve the purpose of releasing the memory.
The existing memory management method is suitable for common intelligent equipment with a single operating system, but more and more intelligent equipment starts to carry double systems, and when memory management modules are respectively arranged for the two systems, the two memory management modules respectively work according to respective maximum occupied memories, so that the memory resources of the operating system running in the background are wasted, and the running smoothness of various software in the operating system running in the foreground is reduced. Therefore, the existing memory management method is not suitable for the intelligent equipment with the dual systems, and the management effect is poor.
Disclosure of Invention
The invention provides a memory management method and device under dual systems, which are used for solving the problems that the existing memory management method is not suitable for intelligent equipment with dual systems and has poor management effect.
The invention provides a memory management method under a dual system, which comprises the following steps:
receiving an operating system switching instruction input by a user;
determining a first operating system running in a foreground and a second operating system running in a background according to the operating system switching instruction;
setting a first maximum occupied memory for the first operating system and setting a second maximum occupied memory for the second operating system;
wherein the first maximum occupied memory is larger than the second maximum occupied memory.
In the above method for managing memory under dual systems, setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system includes:
and setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to the total memory of the equipment carrying the dual systems.
In the above method for managing memory under dual systems, after setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system, the method further includes:
setting a memory threshold value for each process of the first operating system according to the first maximum occupied memory;
and setting a memory threshold value for each process of the second operating system according to the second maximum occupied memory.
In the above memory management method under dual systems, the os switching instruction includes an exit identifier of an os exiting from a foreground and an entry identifier of an os entering into the foreground, and the determining, according to the os switching instruction, a first os running in the foreground and a second os running in the background includes:
and taking the operating system indicated by the entry identifier as the first operating system, and taking the operating system indicated by the exit identifier as the second operating system.
The following describes a memory management device under dual systems according to an embodiment of the present invention, where the device and the method correspond to each other one by one, so as to implement the memory management method under dual systems in the above embodiment, which has the same technical features and technical effects, and the present invention is not described in detail herein again.
The invention provides a memory management device under dual system, comprising:
the receiving module is used for receiving an operating system switching instruction input by a user;
the operating state determining module is used for determining a first operating system running in a foreground and a second operating system running in a background according to the operating system switching instruction;
a maximum occupied memory setting module, configured to set a first maximum occupied memory for the first operating system and set a second maximum occupied memory for the second operating system;
wherein the first maximum occupied memory is larger than the second maximum occupied memory.
In the memory management device under dual systems, the maximum occupied memory setting module is specifically configured to set a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to a total memory of a device on which the dual systems are mounted.
The memory management device under dual systems further includes a process memory threshold setting module, where the process memory threshold setting module is configured to,
setting a memory threshold value for each process of the first operating system according to the first maximum occupied memory;
and setting a memory threshold value for each process of the second operating system according to the second maximum occupied memory.
In the above memory management device under dual systems, the os switching instruction includes an exit identifier of an os exiting from a foreground and an entry identifier of an os entering into the foreground, and the running state determining module is specifically configured to use the os indicated by the entry identifier as the first os and use the os indicated by the exit identifier as the second os.
According to the memory management method and device under the dual systems, after an operating system switching instruction input by a user is received, different maximum occupied memories are distributed to the first operating system running on the foreground and the second operating system running on the background, so that the maximum occupied memory of the operating system changes due to the fact that the operating system running on the background and the background run different, the situation that the operating system running on the background occupies too much memory is avoided, the memory utilization rate is increased, the software running smoothness of the operating system running on the foreground is improved, and the memory management effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic flow chart of a first embodiment of a memory management method under dual systems according to the present invention;
fig. 2 is a schematic flow chart illustrating a second embodiment of a memory management method under dual systems according to the present invention;
fig. 3 is a schematic view of an application scenario of the memory management method under dual systems according to the present invention;
fig. 4 is a schematic structural diagram of a first embodiment of a memory management device under dual systems according to the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of a memory management device under dual systems according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the popularization of the intelligent equipment with the dual operating systems, more and more software is carried in the intelligent equipment with the dual operating systems, and when more software is run, the problem of non-configuration of each software exists. At this time, the memory management method of the single operating system is directly applied to the dual operating system, and the problem of memory waste exists. The present invention provides a memory management method for solving the above problems.
The intelligent device with the double operating systems can be divided into three systems according to the relation of use of the intelligent device with the double operating systems, wherein the three systems comprise a root system which is operated in the background all the time and only provides basic service, a foreground system which is used by a user and interacts with the user, and a background system which is not used by the user and is operated in the background. The root system provides basic service, so that the basic function of the intelligent equipment is ensured to be normal, and the memory occupation is stable, so that the memory management is not needed. When the working system and the living system are used by users, different software is started and operated, so that different memory occupation can be caused, and memory management is required.
Illustratively, the smart device can be a mobile phone, two android operating systems are loaded on the mobile phone, the operating system in which the user is interacting is a foreground operating system, the other operating system is a background operating system, and software which does not need frequent interaction of the user can be run. The user can realize the switching of the two operating systems through a power-off key or system software on the mobile phone, and the operating system running on the foreground is replaced. The following description of the present invention takes the examples of a mobile phone and an android operating system, and it should be understood by those skilled in the art that this is not a limitation to the present invention.
The following describes the memory management method under dual systems in detail by using specific embodiments.
The invention provides a memory management method under a dual system. Fig. 1 is a schematic flow chart of a first embodiment of a memory management method under a dual system according to the present invention, where an execution main body of the method is a memory management device, and the device can be implemented in a software or hardware manner and can be integrated in an existing intelligent device. The invention is not limited in this regard. As shown in fig. 1, the method includes:
s101, receiving an operating system switching instruction input by a user;
s102, determining a first operating system running in a foreground and a second operating system running in a background according to an operating system switching instruction;
s103, setting a first maximum occupied memory for a first operating system and setting a second maximum occupied memory for a second operating system;
the first maximum occupied memory is larger than the second maximum occupied memory.
Specifically, in S101, the memory management device receives an operating system switching instruction input by a user, and illustratively, the user can log in and activate a background operating system from a current foreground operating system to implement switching of the operating system; or a foreground operating system and a background operating system can be set by inputting command line statements in the root system; one-key switching can also be realized according to keys reserved on the intelligent equipment and the like. The switching instruction may include a foreground operating system and a background operating system which are respectively designated, and may also be used for designating a switching operation, and the memory management device switches the existing foreground operating system and the background operating system according to when the operating system switching instruction is received.
It should be noted that, in the step S102, the first operating system running in the foreground, that is, the foreground operating system, and the second operating system running in the background, that is, the background operating system, are also described.
Specifically, in S102, when an operating system switching instruction input by a user is received, according to an execution result of the operating system switching instruction, the operating system running in the foreground after switching is determined and recorded as the first operating system, and the operating system running in the background is determined and recorded as the second operating system.
Specifically, in S103, after the first operating system and the second operating system are determined, considering that there is no interaction between the second operating system running behind and the user, the user is insensitive to the running smoothness of the software therein, and can control the second operating system to run in a smaller total memory, while the first operating system running in the foreground is extremely sensitive to the running smoothness of the software running on the first operating system because of the interaction between the user and the first operating system, and therefore, the operating system needs to allocate a maximum occupied memory to the foreground or the background, and allocate a larger maximum occupied memory to the operating system running in the foreground, thereby avoiding the memory waste of the operating system running in the background, increasing the memory utilization, and improving the software running smoothness.
According to the memory management method under the dual systems, after an operating system switching instruction input by a user is received, different maximum occupied memories are distributed to the first operating system running on the foreground and the second operating system running on the background, so that the maximum occupied memory of the operating system changes due to the fact that the operating system running on the background is different from the operating system running on the foreground, excessive memory occupation is avoided, the memory utilization rate is increased, the software running smoothness of the operating system running on the foreground is improved, and the memory management effect is improved.
Further, on the basis of the embodiment shown in fig. 1, a process of setting a maximum occupied memory is described in detail. When setting a first maximum occupied memory for a first operating system and a second maximum occupied memory for a second operating system, the method specifically includes:
and setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to the total memory of the equipment carrying the dual systems.
For example, the first operating system and the second operating system are both installed on the smart device, and the sum of the maximum occupied memories that the two operating systems can mobilize should not exceed the total memory of the device.
Optionally, when allocating the maximum occupied memory for the first operating system, the total number of software installed by the first operating system and the number of software being run should be considered. If the total number of the software installed in the first operating system is less, and the software started in the normal use process of the user is less, the first maximum occupied memory can be properly reduced.
For example, when the maximum occupied memory is specifically set, the maximum occupied memory of the first operating system and the second operating system may be dynamically configured through a control group (Cgroups) in a kernel of the root system. Cgroups is a mechanism that can limit, record, isolate the memory used by a group of processes. When the memory that a process running in the operating system tries to occupy exceeds the limit of the maximum occupied memory, an out of memory (oom for short) is triggered, so that the process is killed, thereby avoiding the excessive occupation of the memory.
Further, on the basis of the above embodiments, a specific process of setting the maximum occupied memory is described in detail.
Considering that a plurality of processes are operated in an operating system, different processes have different interaction degrees with users, some processes are interacting with users, some processes are operated in a background of the current operating system although not interacting with the users, important services are provided for the users, and some processes are not active after executing tasks. After allocating the maximum occupied memory for the operating system, the available memory needs to be allocated for each process.
According to the running condition of each process in the operating system and the interaction degree of each process and a user, the processes can be divided into a foreground process, a visible process, a desktop process, a secondary service, a background process, a content provider and a null process.
Among them, the foreground process is the most important process in the operating system and is the process interacting with the user.
Visible progress means that a part of the program interface can be seen by the user, but does not interact with the user in the foreground.
Desktop processes are used to perform overall program management of files and icons presented in the desktop in front of the user.
The secondary service refers to a process containing the started service, namely a service process, and the service has no user interface, does not directly interact with the user, but can run in the background for a long time to provide important functions concerned by the user.
Background process means that it does not contain any services that have been started and there is no interactive window visible to the user.
Content providers are used to enable sharing of data between different processes.
An empty process is a process that does not contain any active components and is therefore cleared first when system memory is stressed.
Based on the above classification, fig. 2 is a schematic flow chart of a second embodiment of the memory management method under dual systems according to the present invention. As shown in fig. 2, after setting the first maximum occupied memory for the first operating system and the second maximum occupied memory for the second operating system, the method further includes:
s201, setting a memory threshold value for each process of the first operating system according to the first maximum occupied memory;
s202, setting a memory threshold value for each process of the second operating system according to the second maximum occupied memory.
Illustratively, after determining the maximum occupied memory of the first operating system (or the second operating system), memory thresholds are respectively allocated to a foreground process, a visible process, a desktop process, a secondary service, a background process, a content provider and an empty process of the first operating system (or the second operating system), and the allocated memory thresholds are lower and lower in the order from front to back. When a process intends to occupy memory that exceeds a memory threshold, the process will be killed. When the memory resources are less, the memory occupation is reduced according to the sequence from back to front. For example, the empty process is killed first, followed by the memory provider process.
When memory threshold allocation is implemented, the oom parameter for each operating system may be set by the memory management device.
Optionally, the memory threshold may be 0.
Optionally, on the basis of any of the foregoing embodiments, the operating system switching instruction includes an exit identifier of the operating system that exits from the foreground operation and an entry identifier of the operating system that enters into the foreground operation. And when the user quits a certain operating system from the foreground operating system and logs in another operating system as the foreground operating system, obtaining an operating system switching instruction. After the operating system switching instruction is obtained, according to the operating system switching instruction, determining a first operating system running in a foreground and a second operating system running in a background, specifically including:
and taking the operating system indicated by the entry identifier as a first operating system, and taking the operating system indicated by the exit identifier as a second operating system.
Optionally, three or more operating systems may be loaded in the intelligent device, and the memory management method provided by the present invention is suitable for memory management of multiple operating systems.
Optionally, on the basis of any of the above embodiments, fig. 3 is a schematic view of an application scenario of the memory management method under a dual system provided by the present invention. As shown in fig. 3, the smart device is provided with a first operating system 10 and a second operating system 20, a root system of the smart device is provided with a memory management device 30, the first operating system is provided with a listening service device 11, and the second operating system 20 is provided with a listening service device 22. In a specific implementation, the snoop service device 11 in the first operating system 10 and the snoop service device 22 in the second operating system 20 are configured to modify oom of the operating system according to an instruction of the memory management device 30 after the snoop indicates that the operating system is switched from the foreground to the background or from the background to the foreground.
In another aspect of the present invention, a memory management device under dual systems is further provided, where the memory management device may be implemented by software/hardware, and the present invention is not limited thereto. The device and the method embodiments correspond to each other one to one, and the memory management method under the dual system in the embodiments has the same technical features and technical effects.
Fig. 4 is a schematic structural diagram of a memory management device under dual systems according to a first embodiment of the present invention. As shown in fig. 4, the apparatus includes:
a receiving module 401, configured to receive an operating system switching instruction input by a user;
a running state determining module 402, configured to determine, according to an operating system switching instruction, a first operating system running in a foreground and a second operating system running in a background;
a maximum occupied memory setting module 403, configured to set a first maximum occupied memory for a first operating system and set a second maximum occupied memory for a second operating system.
Optionally, on the basis of the embodiment shown in fig. 4, the maximum occupied memory setting module 403 is specifically configured to set a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to the total memory of the device carrying the dual systems;
the first maximum occupied memory is larger than the second maximum occupied memory.
Optionally, on the basis of the foregoing embodiment, the processes of the operating systems include a foreground process, a visible process, a desktop process, a secondary service, a background process, a content provider, and a null process.
Based on the embodiment of fig. 4, fig. 5 is a schematic structural diagram of a second embodiment of the memory management device under dual systems according to the present invention. As shown in fig. 5, the apparatus further includes a process memory threshold setting module 404, where the process memory threshold setting module 404 is specifically configured to:
setting a memory threshold value for each process of the first operating system according to the first maximum occupied memory;
and setting a memory threshold value for each process of the second operating system according to the second maximum occupied memory.
Optionally, on the basis of the foregoing embodiment, the operating system switching instruction includes an exit identifier of the operating system that exits from the foreground and an entry identifier of the operating system that enters into the foreground, and the running state determining module 402 is specifically configured to use the operating system indicated by the entry identifier as the first operating system, and use the operating system indicated by the exit identifier as the second operating system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A memory management method under dual systems is characterized by comprising the following steps:
receiving an operating system switching instruction input by a user;
determining a first operating system running in a foreground and a second operating system running in a background according to the operating system switching instruction;
setting a first maximum occupied memory for the first operating system and setting a second maximum occupied memory for the second operating system;
wherein the first maximum occupied memory is larger than the second maximum occupied memory;
the setting a first maximum occupied memory for the first operating system includes:
setting a first maximum occupied memory for the first operating system based on the total number of software installed by the first operating system and the number of software running;
after setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system, the method further includes:
respectively setting memory thresholds for a foreground process, a visible process, a desktop process, a secondary service process, a background process, a content provider and an empty process of the first operating system according to the first maximum occupied memory, wherein the set memory thresholds are lower and lower according to the sequence from front to back;
and respectively setting memory thresholds for a foreground process, a visible process, a desktop process, a secondary service process, a background process, a content provider and an empty process of the second operating system according to the second maximum occupied memory, wherein the memory thresholds are set to be lower and lower according to the sequence from front to back.
2. The method of claim 1, wherein setting a first maximum occupied memory for the first operating system and setting a second maximum occupied memory for the second operating system comprises:
and setting a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to the total memory of the equipment carrying the dual systems.
3. The method according to claim 1 or 2, wherein the os switching instruction comprises an exit identifier for exiting the operating system running in the foreground and an entry identifier for entering the operating system running in the foreground, and wherein the determining the first operating system running in the foreground and the second operating system running in the background according to the os switching instruction comprises:
and taking the operating system indicated by the entry identifier as the first operating system, and taking the operating system indicated by the exit identifier as the second operating system.
4. A memory management device under dual systems, comprising:
the receiving module is used for receiving an operating system switching instruction input by a user;
the operating state determining module is used for determining a first operating system running in a foreground and a second operating system running in a background according to the operating system switching instruction;
a maximum occupied memory setting module, configured to set a first maximum occupied memory for the first operating system and set a second maximum occupied memory for the second operating system;
wherein the first maximum occupied memory is larger than the second maximum occupied memory;
the receiving module sets a first maximum occupied memory for the first operating system, and includes:
setting a first maximum occupied memory for the first operating system based on the total number of software installed by the first operating system and the number of software running;
the device also comprises a process memory threshold setting module, wherein the process memory threshold setting module is used for setting the process memory threshold,
respectively setting memory thresholds for a foreground process, a visible process, a desktop process, a secondary service process, a background process, a content provider and an empty process of the first operating system according to the first maximum occupied memory, wherein the set memory thresholds are lower and lower according to the sequence from front to back;
and respectively setting memory thresholds for a foreground process, a visible process, a desktop process, a secondary service process, a background process, a content provider and an empty process of the second operating system according to the second maximum occupied memory, wherein the memory thresholds are set to be lower and lower according to the sequence from front to back.
5. The apparatus according to claim 4, wherein the maximum occupied memory setting module is specifically configured to set a first maximum occupied memory for the first operating system and a second maximum occupied memory for the second operating system according to a total memory of a device on which the dual system is mounted.
6. The apparatus according to claim 4 or 5, wherein the os switching instruction includes an exit identifier for exiting from the operating system running in the foreground and an entry identifier for entering into the operating system running in the foreground, and the running state determining module is specifically configured to use the operating system indicated by the entry identifier as the first operating system and use the operating system indicated by the exit identifier as the second operating system.
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| CN110737478B (en) * | 2018-07-18 | 2023-05-26 | 鼎桥通信技术有限公司 | System starting control method and system |
| CN111736452B (en) * | 2019-03-25 | 2023-04-07 | 成都鼎桥通信技术有限公司 | Multi-system control method, device, equipment and storage medium |
| CN112738809A (en) * | 2019-10-28 | 2021-04-30 | 成都鼎桥通信技术有限公司 | Mobile data connection switching method, device, equipment and storage medium |
| CN112988244A (en) * | 2019-12-17 | 2021-06-18 | 成都鼎桥通信技术有限公司 | Method and equipment for starting and stopping background operating system in intelligent terminal with double operating systems |
| CN112817932A (en) * | 2020-05-19 | 2021-05-18 | 中兴通讯股份有限公司 | Data transfer method, equipment and storage medium |
| CN114168203B (en) * | 2020-09-10 | 2024-02-13 | 成都鼎桥通信技术有限公司 | Dual-system running state control method and device and electronic equipment |
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| CN101883003A (en) * | 2009-05-08 | 2010-11-10 | 华北电力大学 | Mandatory running method of computer operating system |
| CN103914400A (en) * | 2012-12-31 | 2014-07-09 | 联想(北京)有限公司 | Memory allocation method and electronic device |
| CN104331337B (en) * | 2014-11-25 | 2018-07-24 | 宇龙计算机通信科技(深圳)有限公司 | Installed System Memory management method, Installed System Memory managing device and terminal |
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