TWI450091B - System and method for managing a memory - Google Patents

Description

Memory management system and method

The present invention relates to a memory management system and method, and more particularly to a memory management system and method for use in a mobile device.

Dynamic memory configuration is related to the execution efficiency of software in a computer or embedded system, including configuration/release speed and the number of programs that can be executed at the same time.

In the Real-Time Operating System (RTOS), the application's response speed is especially emphasized. Therefore, the Memory Partition Memory Pool is often used to dynamically configure the memory. The advantage of this method is that the configuration and release speed is fast, the configuration time is consistent in any case, and does not change with the use condition.

However, the disadvantages of this method are: (1) the size and number of sub-blocks obtained after each memory block division are planned in advance; (2) there is a problem of internal fragmentation.

In view of the above, it is necessary to provide a memory management system and method, and when the mobile device is activated, the configuration of the memory block can be dynamically adjusted according to actual usage conditions.

A memory management system is applied to a mobile device, the system comprising: an initialization module, configured to initialize a memory block when the mobile device is started; a statistical module For counting the peak usage rate and the average breaking rate of the memory block, and recording the statistical number T; the statistical module is further configured to determine whether the mobile device is the first time each time the statistical number T is recorded Perform memory block configuration, and determine whether T>T1 when the memory block configuration is performed for the first time, or determine whether T>T2 when not the first memory block configuration, where T1 and T2 are Preset value, and T1 T2; the first adjustment module is used to reset the statistical number T when T>T1 or T>T2, and adjust the memory block P1 and P2 with the highest and lowest peak usage rate. The memory block P2 with the lowest peak usage rate is converted into the memory block P1 with the highest peak usage rate; the second adjustment module is used for adjusting the memory with the highest average breaking rate among the peak usage rates of the preset spikes. The body block P3, and the block size is just smaller than the memory block P4 of P3. When the actual use size of P3 is close to P3 itself, P3 is adjusted to be small. When the actual use size of P3 is close to the size of P4, P4 is adjusted; the combination module is used to adjust the first adjustment module and the second After adjusting the whole module in the remaining part of R1 and R2 are combined into a plurality of blocks P1, the remaining portion referred to as R3, R3 may be an adjustment to be reused when the memory block is arranged.

A memory management method is applied to a mobile device, the method comprising the steps of: initializing a memory block when the mobile device is started, and starting to measure a peak usage rate and an average breaking rate of the memory block; The number of intervals, re-adjust the configuration of the memory block, including: adjusting the memory block P1 and P2 with the highest and lowest peak usage, and converting the memory block P2 with the lowest peak usage to the highest peak usage. The memory block P1, the remaining part is denoted as R1; the adjusted peak usage rate is greater than the memory peak block P3 with the highest average breaking rate among the preset peak usage rates, and the memory block P4 whose block size is just smaller than P3, when When the actual use size of P3 is close to P3 itself, P3 is reduced. When the actual use size of P3 is close to the size of P4, P4 is increased, and the rest is recorded as R2; the remaining parts R1 and R2 are combined after adjustment. to make Several P1 blocks, the remainder is denoted as R3, and R3 can be reused the next time the memory block configuration is adjusted.

Compared with the prior art, the memory management system and method can dynamically adjust the configuration of the memory block according to the actual use condition after the mobile device is started, thereby improving the use efficiency of the memory and reducing the memory area. Internal fragmentation in the block.

1‧‧‧Microprocessor

2‧‧‧Storage

3‧‧‧Input/output devices

20‧‧‧Memory Management Unit

21‧‧‧ memory

200‧‧‧Initialization module

201‧‧‧Statistical Module

202‧‧‧First adjustment module

203‧‧‧Second adjustment module

204‧‧‧ combination module

S41‧‧‧ Initialize memory block

S42‧‧‧ Peak usage rate and average fragmentation rate of statistical memory blocks, record statistics number T

S43‧‧‧Determination of whether it is the first memory block configuration

S44‧‧‧Judge whether T>T2

S45‧‧‧Judge whether T>T1

S46‧‧‧Reset T to adjust the highest and lowest peak memory blocks P1 and P2

S47‧‧‧ Adjusting the peak usage rate is higher than the memory block P3 with the highest average breaking rate in Ub and the memory block P4 with the block size just smaller than P3

S48‧‧‧ Combine the remaining parts of the adjustment into several P1 blocks

1 is a hardware architecture diagram of a preferred embodiment of a memory management system of the present invention.

2 is a functional block diagram of the memory management unit of FIG. 1.

3 is a flow chart of a preferred embodiment of a memory management method of the present invention.

Figure 4 is a schematic illustration of a memory block of the present invention.

FIG. 5 is a schematic diagram of the memory adjustment of step S46 in FIG. 4.

FIG. 6 is a specific flowchart of step S46 in FIG.

FIG. 7 is a schematic diagram of the memory adjustment of step S47 in FIG. 4.

FIG. 8 is a specific flowchart of step S47 in FIG.

FIG. 9 is a schematic diagram of the memory adjustment of step S48 in FIG. 4.

Referring to FIG. 1, a hardware architecture diagram of a preferred embodiment of a memory management system of the present invention is shown. The system mainly comprises a microprocessor 1, a memory 2 and an input/output device 3, which is connected to the storage 2 and the input/output device 3. The storage 2 includes a memory 21 and a memory management unit 20. The memory 21 is used to store various materials (such as short messages or MMS, which may be sourced from other mobile devices or downloaded from the Internet). The memory 21 can be dynamically stored Take a memory (Dynamic Random Access Memory, DRAM) or Synchronous DRAM (SDRAM). The input/output device 3 includes an LCD liquid crystal display screen and a keyboard, etc., for displaying data and inputting information, respectively.

The microprocessor 1 is used to call the memory management unit 20 and control the execution of the memory management unit 20. The memory management unit 20 is configured to dynamically adjust the configuration of the memory 21 according to actual usage conditions after the mobile device is activated.

Referring to FIG. 2, it is a functional block diagram of the memory management unit 20 shown in FIG. 1. The memory management unit 20 includes an initialization module 200, a statistics module 201, a first adjustment module 202, a second adjustment module 203, and a combination module 204. The module referred to in the present invention is a computer program segment for performing a specific function, and is more suitable for describing the execution process of the software in the computer than the program. Therefore, the following description of the software is described in the module.

The initialization module 200 is configured to initialize a memory block when the mobile device is started. In the present embodiment, different memory blocks are recorded at P1, P2, ..., Pm, and the number of sub-blocks included in the memory blocks P1, P2, ..., Pm is recorded in N1, N2, ..., Nm ( Each sub-block is equal in size), and S1, S2, ..., Sm record the size of each of the memory blocks P1, P2, ..., Pm. Among them, the size of one memory block Pm = Sm * Nm. As shown in FIG. 4, it is a schematic diagram of a memory block of the present invention. In FIG. 4, the size of each sub-block in the memory blocks P5, P6, P7, and P8 is 1 byte group, 2 byte groups, 3 byte groups, and 4 byte groups, respectively. The number of sub-blocks included in the memory blocks P5, P6, P7, and P8 are 18, 12, 4, and 3, respectively. Therefore, the sizes of the memory blocks P5, P6, P7, and P8 are 1*18=18 (bytes), 2*12=24 (bytes), 3*4=12 (bytes), and 4*3=12 (bytes).

The statistical module 201 is configured to count the peak usage rate and the average breaking rate of the memory block, and record the statistical number T. The peak usage rate refers to the highest value of the memory usage rate, which is the average value of the proportion of the memory fragments in the memory block, and the memory fragment refers to: when the memory is allocated Excess memory space when the body block is larger than the required memory size. For example, the demand is 35 Bytes, and the allocated memory block size is 50 Bytes. The extra 15 Bytes is called memory fragmentation, and the memory block has a fragmentation rate of 15/50=30%. The number of statistics refers to the number of times the statistical memory block peak usage rate and the average breaking rate are used.

The statistic module 201 is further configured to determine, when each time the number of statistics is recorded T, whether the mobile device is configured for the first time, and whether T>T1 or T>T2. Among them, T1 and T2 are preset values, and T1 T2. Wherein, it is possible to record whether the memory block configuration is performed for the first time by using a variable. If the memory block configuration is performed for the first time, the variable is set to 1, and it is determined whether the variable is 1 or not. The memory block configuration is performed for the first time.

The first adjustment module 202 is configured to reset the statistical number T (ie, set the variable T to 0) when T>T1 or T>T2, and adjust the memory block P1 with the highest and lowest peak usage rate. P2 converts the memory block P2 with the lowest peak usage rate into the memory block P1 with the highest peak usage rate. In the present embodiment, the system is pre-configured with three peak usage rates: a first peak usage rate Ua, a second peak usage rate Ub, and a lowest rated usage rate Un, where Ua>Ub>Un. In this embodiment, if the peak usage rates of the memory blocks P1 and P2 are both greater than or equal to the first peak usage rate Ua, the first adjustment module 202 does not perform adjustment; if the peak usage rate of one memory block Less than the minimum rated usage rate Un, the minimum rated usage rate Un is used as the memory area when calculating The peak usage of the block.

Specifically, if the memory block P1 with the highest peak usage rate is a larger memory block, and the memory block P2 with the lowest peak usage rate is a smaller memory block, the first adjustment module 202 combines several smaller memory blocks P2 into one larger memory block P1, the remainder is denoted as R1 (see Figure 5a); if the highest peak usage memory block P1 is a smaller memory The body block, and the memory block P2 with the lowest peak usage rate is a larger memory block, and the first adjustment module 202 decomposes the larger memory block to become a smaller memory area. Block P1, the remainder is denoted as R1 (see Figure 5b). In the present embodiment, the larger memory block refers to a memory block having a larger memory sub-block, and the remaining portion refers to a memory space that is extra after adjustment. The specific process is described in step S46 in FIG.

The second adjusting module 203 is configured to adjust the memory block P3 with the peak breaking rate higher than the preset second peak usage rate Ub, and the memory block P4 whose block size is just smaller than P3. If the actual use size of the memory block P3 is close to P3 itself, the memory block P3 is turned down. If the actual use size of the memory block P3 is close to the size of the memory block P4, the memory will be The block P4 is adjusted to be larger, so that the adjusted memory block size is closer to the actual demand, the breakage rate is reduced, and the memory is utilized more effectively. Specifically, the second adjustment module 203 first calculates O4=((S3*(1-F3%)/S4)-1)*100, where S3 and S4 represent each memory in the memory blocks P3 and P4. The size of the body block, F3 represents the average breaking rate of the memory block P3.

If F3<O4 (ie, the actual use size of the memory block P3 is close to the P3 itself), the second adjustment module 203 reduces the memory block P3 by D%, and the memory sub-block of the memory block P3. The number is the same, the remainder is recorded as R2 (see Figure 7a); if F3 O4 (ie, the actual use size of the memory block P3 is close to the size of the memory block P4), the second adjustment module 203 increases the memory block P4 by D%, and the memory block of the memory block P4. The number of blocks is reduced and the remainder is noted as R2 (see Figure 7b). In other embodiments, in order to meet the actual needs, the largest memory block can be restricted from being reduced. The specific process is described in step S47 in FIG. In this embodiment, D% is a preset value. In other embodiments, the size of the D% value may be dynamically adjusted according to the size of the memory block.

The combination module 204 is configured to combine the remaining portions R1 and R2 of the first adjustment module 202 and the second adjustment module 203 into a plurality of P1 blocks, and the remaining part is denoted as R3, and R3 can be next time. The configuration of the memory block is re-used (see Figure 9). In Fig. 9, R3 on the left represents the remainder after the last combination, and R3 on the right represents the remainder after the completion of the combination.

Referring to FIG. 3, a flow chart of a preferred embodiment of a memory management method according to the present invention is shown.

In step S41, when the mobile device is activated, the initialization module 200 initializes the memory block.

In step S42, the statistical module 201 counts the peak usage rate and the average breaking rate of the memory block, and records the statistical number T.

In step S43, the statistic module 201 determines whether the mobile device is the first time to perform the memory block configuration. If yes, step S45 is performed, and if not, step S44 is performed. At the first boot of the system, the memory block is managed in a preset manner. Subsequently, the statistical module 201 counts the actual usage status of the memory block (including the peak usage rate and the average breaking rate), and the statistical number is accumulated to the preset statistical number T1, and then Start adjusting the configuration of the memory block. After each multi-statistic T2 (T1 T2) times, the configuration of the memory block is adjusted once, and the nearest T1 number is taken as the basis for calculating the peak usage rate and the average breaking rate. For example, if T1=5 and T2=3, after the number of statistics reaches 5 times, the configuration of the memory block is adjusted. After the number of statistics reaches 8 (5+3) times, the configuration of the memory block is adjusted again and taken. The 4th, 5th, 6th, 7th and 8th statistic data are used as the basis for calculating the peak usage rate and the average breaking rate. When T1=T2, this step can also be canceled, and it is directly judged whether T>T1 or T>T2.

In step S44, the statistic module 201 determines whether T>T2. If T>T2, step S46 is performed. Otherwise, the flow returns to step S42 to continue counting the peak usage rate and the average breaking rate of the memory block.

In step S45, the statistic module 201 determines whether T>T1. If T>T1, step S46 is performed. Otherwise, the flow returns to step S42 to continue counting the peak usage rate and the average fragmentation rate of the memory block.

In step S46, the first adjustment module 202 resets the statistical number T, and adjusts the memory blocks P1 and P2 with the highest and lowest peak usage rates, and converts the memory block P2 with the lowest peak usage rate into the highest peak usage rate. The memory block P1, the specific process is shown in the description of FIG. If the memory block P1 with the highest peak usage rate is a larger memory block, and the memory block P2 with the lowest peak usage rate is a smaller memory block, the first adjustment module 202 combines several The smaller memory block P2 becomes a larger memory block P1, the remainder is denoted as R1 (see Figure 5a); if the highest peak usage memory block P1 is a smaller memory block, The memory block P2 with the lowest peak usage rate is a larger memory block, and the first adjustment module 202 decomposes the larger memory block into a smaller memory block P1, and the remaining Part is denoted as R1 (see Figure 5b). In the present embodiment, if the memory blocks P1 and P2 are If the spike usage is greater than or equal to the first spike usage Ua, then this step is not performed.

Step S47, the second adjustment module 203 adjusts the memory block P3 whose peak use rate is greater than the average peak break rate of the second peak use rate Ub, and the memory block P4 whose block size is just smaller than P3, if the memory area If the actual use size of the block P3 is close to P3 itself, the memory block P3 is reduced. If the actual use size of the memory block P3 is close to the size of the memory block P4, the memory block P4 is increased. For the specific process, refer to the description of FIG. 8. Specifically, the second adjustment module 203 first calculates O4=((S3*(1-F3%)/S4)-1)*100. Among them, S3 and S4 represent the size of each memory sub-block in the memory blocks P3 and P4, and F3 represents the average breaking rate of the memory block P3. If F3<O4 (ie, the actual use size of the memory block P3 is close to the P3 itself), the second adjustment module 203 reduces the memory block P3 by D%, and the memory sub-block of the memory block P3. The number is the same, the remainder is denoted as R2 (see Figure 7a); if F3 O4 (ie, the actual usage size of the memory block P3 is close to P4), the second adjustment module 203 increases the memory block P4 D%, the number of memory sub-blocks of the memory block P4 is reduced, and the remainder is denoted as R2 (see Fig. 7b). In other embodiments, in order to meet the actual needs, the largest memory block can be restricted from being reduced.

In step S48, the combination module 204 combines the remaining portions R1 and R2 in steps S46 and S47 into a plurality of P1 blocks, and the remaining portion is denoted as R3, and R3 can be repeated when the configuration of the memory block is adjusted next time. Use (see Figure 9).

Referring to FIG. 6, a specific flowchart of step S46 in FIG. 4 is shown. In step S50, the first adjustment module 202 finds the memory blocks P1 and P2 with the highest and lowest peak usage rates.

In step S51, the first adjustment module 202 determines whether the peak usage rate of the memory block P2 is smaller than the first peak usage rate Ua. If the peak usage of P2 is less than Ua, perform the steps. S52. If the peak usage rate of P2 is greater than or equal to Ua, step S47 is performed.

In step S52, the first adjustment module 202 determines whether the size S1 of one memory sub-block in the memory block P1 is greater than the size S2 of one memory sub-block in the memory block P2. If S1>S2, step S53 is performed, and if S1S2, step S55 is performed.

In step S53, the first adjustment module 202 determines whether the condition 1 is met, and the condition 1 is: N2-(S1/S2)>N2*U2 (that is, the number of sub-blocks adjusted by the memory block P2 is greater than the actual use before the adjustment. Number), and N2-(S1/S2)>N0 (ie, the number of sub-blocks adjusted by the memory block P2 is greater than a preset minimum number of ratings). If condition 1 is met, step S54 is performed, and if condition 1 is not met, step S57 is performed. Where N2 represents the number of sub-blocks before the memory block P2 is adjusted, U2 represents the peak usage rate actually counted by the memory block P2, and N0 represents the minimum rated number of the memory sub-blocks.

In step S54, the first adjustment module 202 combines the plurality of memory blocks P2 into one memory block P1, and the remaining portion is denoted as R1, and then the flow proceeds to step S47.

In step S55, the first adjustment module 202 determines whether the condition 2 is met, and the condition 2 is: N2-1>N2*U2 (that is, the number of sub-blocks adjusted by the memory block P2 is greater than the actual number of uses before the adjustment), and N2-1>N0 (that is, the number of sub-blocks adjusted by the memory block P2 is greater than a preset minimum number of ratings). If condition 2 is met, step S56 is performed, and if condition 2 is not met, the flow proceeds to step S47.

In step S56, the first adjustment module 202 decomposes one memory block P2 into a plurality of memory blocks P1, and the remaining portion is denoted as R1, and then the flow proceeds to step S47.

In step S57, the first adjustment module 202 determines whether the condition is met: (N2-N2*U2)<(N2-N0), if the condition is met, step S59 is performed, and if the condition is not met, step S58 is performed.

In step S58, the first adjustment module 202 records the size of R1 with the value of (N2-N0)*S2, and the flow proceeds to step S47.

In step S59, the first adjustment module 202 records the size of R1 with the value of (N2-N2*U2)*S2, and the flow proceeds to step S47.

Referring to FIG. 8, a specific flowchart of step S47 in FIG. 4 is shown. In step S60, the second adjustment module 203 finds the memory block P3 whose peak use rate is higher than the average peak break rate in the second peak use rate U2, and the memory block P4 whose block size is just smaller than P3.

In step S61, the second adjustment module 203 determines whether the condition 3 is met, and the condition 3 is: F3<((S3*(1-F3%)/S4)-1)*100 (that is, the actual use size of the memory block P3) Close to P3 itself. If condition 3 is met, step S62 is performed, and if condition 3 is not met, step S64 is performed, where F3 represents the average breaking rate (sum of breaking rate/statistics) of the memory block P3.

In step S62, the second adjustment module 203 determines whether the condition 5 is met, and the condition 5 is: S3*(1-D%)>S4 (that is, the adjusted sub-block size of the memory block P3 is larger than the memory block P4. Subblock size). If the condition 5 is met, step S63 is performed, and if the condition 5 is not met, the flow proceeds to step S48. Among them, D% is the preset adjustment ratio.

In step S63, the second adjustment module 203 reduces the memory block P3 by D%, the number of memory sub-blocks is unchanged, and the remaining part is denoted as R2, and then the flow proceeds to step S48.

In step S64, the second adjustment module 203 determines whether the condition 4 is met, and the condition 4 is: (N4*S4)/(S4*(1+D%))>N4*U4 (that is, the adjusted sub-block of the memory block P4) The number of blocks is greater than the actual number of uses before the adjustment), and (N4*S4)/(S4*(1+D%))>N0 (that is, the number of sub-blocks adjusted by the memory block P4 is greater than the preset minimum) Rated number). If the condition 4 is met, step S65 is performed, such as If the condition 4 is not met, step S67 is performed. Among them, N4 represents the number of sub-blocks before the memory block P4 is adjusted, and U4 represents the peak usage rate actually counted by the memory block P4.

In step S65, the second adjustment module 203 determines whether the condition 6 is met, and the condition 6 is: S4 < S3 after the adjustment. If the condition 6 is met, step S66 is performed, and if the condition 6 is not met, the flow proceeds to step S48.

In step S66, the second adjustment module 203 increases the memory block P4 by D%, reduces the number of memory sub-blocks, and records the remainder as R2. Then, the flow proceeds to step S48.

In step S67, the second adjustment module 203 determines whether the condition is met: (N4-N4*U4)<(N4-N0), if the condition is met, step S68 is performed, and if the condition is not met, step S70 is performed.

In step S68, the second adjustment module 203 determines whether the condition 6 is met. If the condition 6 is met, step S69 is performed. If the condition 6 is not met, the flow proceeds to step S48.

In step S69, the second adjustment module 203 increases the memory block P4 (N4-N4*U4)*S4/(N4*U4), and the number is N4*U4, and the remaining part is recorded as R2, and then the flow is changed. Go to step S48. Among them, N4 represents the number of sub-blocks before the memory block P4 is adjusted, and U4 represents the peak usage rate actually counted by the memory block P4.

In step S70, the second adjustment module 203 determines whether the condition 6 is met. If the condition 6 is met, step S71 is performed. If the condition 6 is not met, the flow proceeds to step S48.

In step S71, the second adjustment module 203 increases the memory block P4 by (N4-N0)*S4/N0, and the number is N0, and the remaining part is denoted as R2, and then the flow proceeds to step S48.

The mobile device in this embodiment may be a mobile phone, a digital camera or a PDA ( Electronic devices with data processing functions such as Personal Digital Assistant.

The memory management system and method of the present invention are disclosed above in the preferred embodiments, but are not intended to limit the present invention. Any person skilled in the art will be able to make changes and refinements without departing from the spirit and scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

S41‧‧‧ Initialize memory block

S42‧‧‧ Peak usage rate and average fragmentation rate of statistical memory blocks, record statistics number T

S43‧‧‧Determination of whether it is the first memory block configuration

S44‧‧‧Judge whether T>T2

S45‧‧‧Judge whether T>T1

S46‧‧‧Reset T to adjust the highest and lowest peak memory blocks P1 and P2

S47‧‧‧ Adjusting the peak usage rate is higher than the memory block P3 with the highest average breaking rate in Ub and the memory block P4 with the block size just smaller than P3

S48‧‧‧ Combine the remaining parts of the adjustment into several P1 blocks

Claims (10)

A memory management method is applied to a mobile device, the method comprising the steps of: initializing a memory block when the mobile device is activated, and starting to count the peak usage rate and the average breaking rate of the memory block; The number of intervals is set, and the configuration of the memory block is re-adjusted, including: adjusting the memory block P1 and P2 with the highest and lowest peak usage, and converting the memory block P2 with the lowest peak usage into the peak usage rate. The highest memory block P1, the remaining part is denoted as R1; the adjusted peak usage rate is greater than the memory peak block P3 with the highest average breaking rate among the preset peak usage rates, and the memory block P4 whose block size is just smaller than P3 When the actual use size of P3 is close to P3 itself, P3 is adjusted to be small. When the actual use size of P3 is close to the size of P4, P4 is increased, and the rest is recorded as R2; and the remaining part R1 will be adjusted. Combined with R2 into several P1 blocks, the remainder is denoted as R3, and R3 can be reused the next time the memory block configuration is adjusted. The memory management method according to claim 1, wherein the step of adjusting the highest and lowest peak usage of the memory blocks P1, P2 includes: if the peak usage rate of the memory block P1 is the highest A larger memory block, and the memory block P2 with the lowest peak usage is a smaller memory block, and a plurality of smaller memory blocks P2 are combined into one larger memory block P1. And if the memory block P1 with the highest peak usage rate is a smaller memory block, and the memory block P2 with the lowest peak usage rate is a larger memory block, the larger memory area is decomposed. The block change P2 becomes a plurality of smaller memory blocks P1. The memory management method of claim 2, wherein the larger memory A block is a memory block with a larger memory block. The memory management method according to claim 1, wherein the step of adjusting the peak usage rate is greater than a preset peak usage rate, and the memory block P3 having the highest average breaking rate is the smallest, and the block size is smaller than The memory block P4 of P3 includes: calculating O4=((S3*(1-F3%)/S4)-1)*100, where S3 and S4 represent each of the memory blocks P3 and P4 The size of the block, F3 represents the average breaking rate of the memory block P3; if F3 < O4, the memory block P3 is reduced by D%, and the number of memory sub-blocks of the memory block P3 is unchanged. Wherein, D% is a preset value; if F3 O4, the memory block P4 is increased by D%, and the number of memory sub-blocks of the memory block P4 is decreased. The memory management method according to claim 4, wherein the largest memory block does not perform a small adjustment operation. A memory management system is applied to a mobile device, wherein the system includes: an initialization module, configured to initialize a memory block when the mobile device is started; and a statistical module for counting the memory block The peak usage rate and the average breaking rate, and the statistical number T is recorded at the same time; the statistical module is further configured to determine whether the mobile device is configured to perform the memory block configuration for the first time each time the statistical number T is recorded. And determining whether T>T1 when the memory block configuration is performed for the first time, or determining whether T>T2 when the memory block configuration is not performed for the first time, wherein T1 and T2 are preset values, and T1 T2; the first adjustment module is used to reset the statistical number T when T>T1 or T>T2, and adjust the memory blocks P1 and P2 with the highest and lowest peak usage, and the peak utilization rate is the lowest. The memory block P2 is converted into the memory block P1 with the highest peak usage rate; the second adjustment module is configured to adjust the memory block P3 with the highest average breaking rate among the peak usage rates of the spikes, and The block size is just smaller than the memory area of P3 Block P4, when P3 When the actual use size is close to P3 itself, P3 is adjusted to be smaller. When the actual use size of P3 is close to the size of P4, P4 is increased; and the combination module is used for the first adjustment module and the second adjustment mode. The remaining portions R1 and R2 in the group are combined into a plurality of P1 blocks, and the remaining portion is denoted as R3, and R3 can be reused when the configuration of the memory block is adjusted next time. The memory management system of claim 6, wherein the first adjustment module adjusts the highest and lowest peak usage of the memory blocks P1 and P2, including: if the peak usage rate is the highest. Block P1 is a larger memory block, and the memory block P2 with the lowest peak usage is a smaller memory block, and a plurality of smaller memory blocks P2 are combined into one larger memory. Body block P1; and if the memory block P1 with the highest peak usage rate is a smaller memory block, and the memory block P2 with the lowest peak usage rate is a larger memory block, the decomposition is larger The memory block changes P2 into several smaller memory blocks P1. The memory management system of claim 7, wherein the larger memory block refers to a memory block having a larger memory sub-block. The memory management system of claim 6, wherein the second adjustment module adjusts a memory block P3 and a region with a peak usage rate greater than a preset peak usage rate and a highest average breaking rate. The memory block P4 whose block size is just smaller than P3 includes: calculating O4=((S3*(1-F3%)/S4)-1)*100, where S3 and S4 represent each of the memory blocks P3 and P4 The size of the memory sub-block, F3 represents the average breaking rate of the memory block P3; if F3 < O4, the memory block P3 is reduced by D%, and the memory sub-block of the memory block P3 The number is unchanged, wherein D% is a preset value; if F3 O4, the memory block P4 is increased by D%, and the number of memory sub-blocks of the memory block P4 is decreased. The memory management system of claim 6, wherein the mobile device is a hand Machine, digital camera or PDA.