CN103677757A - Method for controlling parallelism degree of program capable of sensing band width of storage device - Google Patents
Method for controlling parallelism degree of program capable of sensing band width of storage device Download PDFInfo
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Abstract
The invention discloses a method for controlling the parallelism degree of a program capable of sensing the band width of a storage device. By means of the method, the parallelism degree of the application program is dynamically adjusted according to the comprehensive performance and real-time loading conditions of the storage device of an operating platform of the application program in a self-adaptive mode, namely the number of courses or threads, so that the application program keeps and obtains the parallelism degree with the optimal I/O efficiency. According to the method, the information of the I/O efficiency of the application program is monitored and recorded in real time and is used as feedback information to control and adjust the parallelism degree of the application program. The parallelism degree of the program is probed step by step and increased gradually until the parallelism degree reaches the inflection point of the actual I/O efficiency, and then fine adjustment is carried out to obtain the optimal parallelism degree for different application program platforms; further according to the real-time loading conditions of the different application program platforms, periodic, dynamic and self-adaptive operation combining active adjustment and passive adjustment is carried out to obtain the optimal parallelism degree of the application program.
Description
Technical field
The present invention relates to a kind of control that is applicable to the concurrent program degree of parallelism of chip multi-core multiprocessor, particularly a kind of program parallelization degree control method that can perception memory device I/O bandwidth.
Background technology
Chip multi-core multiprocessor (Chip Mulit-Processor, CMP) is exactly that a plurality of calculating kernels are integrated in processor chips, thereby improves computing power.The sharing and synchronization that need to carry out data between the program that each core cpu of CMP processor is carried out, so its hardware configuration must be supported internuclear communication.
After the appearance of CMP treatment technology, the parallelization of conventional serial program becomes the emphasis of research, most concurrent programs are usingd the check figure of CMP as the important references index of selecting degree of parallelism (process or number of threads), this processing policy has been obtained good effect in the application program of computation-intensive, if but the CMP of calculated performance only consider to(for) the application of I/O intensity may not reach maximum acceleration effect or throughput (I/O throughput is also referred to as I/O bandwidth), because application program may be limited to the I/O(I/O of this application platform of operation) performance.
The I/O ability of different application platform differs greatly, and this mainly depends on memory device (for example, ordinary PC, with the server of scsi interface, with the server of disk array and RAID card, magnetic disc i/o bandwidth has very big-difference).Scale based on memory device, has produced the hierarchical structure based on friction speed and capacity memory.As for a multi-level store hierarchical structure, please refer to < < Computer Systems Organization--quantitative method > > mono-book of the translations such as in July, 2004 Zheng Weimin, Fig. 5 .1 in the 5th chapter storage hierarchy design of this book is explained in detail.Being applied in while moving on different parallel tables of frequent access I/O equipment, is difficult to directly determine the degree of parallelism that can obtain maximum I/O efficiency, and the too low meeting of degree of parallelism causes I/O bandwidth to be not fully utilized wastes processor core resource simultaneously; Degree of parallelism is too high equally may not necessarily improving performance, because I/O bandwidth has become bottleneck, cross highland degree of parallelism and cause phase mutual interference aggravation between parallel execution unit, such as meeting makes file prefetch mechanisms and the disk action confusion reigned of kernel, thereby cause overall performance not rise counter falling.
For the Parallel application of I/O intensity, according to the handling property of different application platform, come, determine that degree of parallelism cannot the maximum advantage of bringing into play parallel processing.Therefore, how can, adaptively according to the comprehensive hardware condition of different application platform and real-time load state, determine that dynamically corresponding best degree of parallelism becomes the key of dealing with problems.
Summary of the invention
The object of the invention is to propose a kind of adaptive according to the memory device combination property of application program operation platform and real-time load state, dynamically adjust the degree of parallelism of application program, be process or number of threads, make application program keep obtaining the degree of parallelism of best I/O efficiency.The method, by monitoring in real time and records application program I/O efficiency information, is controlled the degree of parallelism of adjusting application program using it as feedback information.The method until reach the flex point of I/O actual efficiency, then finely tunes to obtain the best degree of parallelism for different application platform by progressively surveying the degree of parallelism of progressive increase program; And then carry out periodically according to the real-time load state of different application platform, the best degree of parallelism that the dynamic self-adapting that active accommodation combines with passive adjustment has operated application program obtains.
A kind of program parallelization degree control method that can perception memory device bandwidth of the present invention, the program of moving on application platform can be divided into three states, i.e. initial state, stable state and final state according to program I/O efficiency;
Initial state refers to a kind of state when application program is opened with lower degree of parallelism operation;
Stable state refers to a kind of state when application program enters stable operation after initial state;
Final state refers to a kind of state when application program is moved through maintaining higher I/O efficiency after stable state;
It is characterized in that: described program parallelization degree control method includes following treatment step:
Step 1: the real-time monitoring of I/O efficiency
Step 101: the byte number of the read/write function of recording address intercepting-efficiency monitoring
I I/O efficiency monitoring time T
iin, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
ithe byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In application program running time T
alwaysunder condition, the byte number of the read/write function of all addresses intercepting-efficiency monitoring is designated as
referred to as address intercepting-efficiency monitoring-byte number
Step 102: the byte number that records the read/write function of function overloading-efficiency monitoring
I+1 I/O efficiency monitoring time T
i+1in, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
i+1the byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of all function overloading-efficiency monitorings is designated as
referred to as function overloading-efficiency monitoring-byte number
Step 103: the byte number of the read/write function of record interface information-efficiency monitoring
I I/O efficiency monitoring time T
iin, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
ithe byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of total interface information-efficiency monitoring is designated as
referred to as interface message-efficiency monitoring-byte number
Step 2: the denoising of the byte number of read/write function
During application program operation, include different I/O efficiency monitoring type MODE, be that MODE includes address intercepting-efficiency monitoring type SYS, function overloading-efficiency monitoring type USR and interface message-efficiency monitoring type i NT, be MODE={SYS, USR, INT};
According to denoising condition
the byte number of read/write function is carried out to filtering interfering processing, obtain filtering postbyte number; If being " 1 ", value chooses
and carry out degree of parallelism extraction process, then locate fast, if being " 0 ", value abandons
degree of parallelism extract, directly locate fast;
Q represents the number of I/O efficiency monitoring time;
I represents any one I/O efficiency monitoring time;
be illustrated in I/O efficiency monitoring time T
i+1under condition, the byte number of the read/write function of any I/O efficiency monitoring type MODE;
C
threshold valuethe critical value that represents the judgement wave phenomenon generation that denoising arranges;
According to denoising condition E to address intercepting-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
According to denoising condition E to function overloading-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
According to denoising condition E docking port information-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
Step 3: the quick location of degree of parallelism
The value of described degree of parallelism P is 2 power, has P=1,2,4,8 ..., 2
p, p represents exponential; Application program brings into operation with degree of parallelism P=1 after opening, and the filtration postbyte number scale of obtaining under the condition of P=1 is
after value P=1, degree of parallelism is according to P=2
poperation, and obtain filtering postbyte number scale and be
According to degree of parallelism, from little to greatly the filtration postbyte number different degree of parallelisms being carried out to histogram structure, obtain degree of parallelism-I/O efficiency histogram; Byte number by more described degree of parallelism-I/O efficiency histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of I/O efficiency monitoring;
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=1, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=2, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=4, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=8, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=16, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=32, be
By degree of parallelism P=2
pcondition under address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain address intercepting-efficiency monitoring histogram; Byte number by the intercepting-efficiency monitoring histogram of more described address, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of address intercepting;
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under function overloading-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain function overloading-efficiency monitoring histogram; Byte number by more described function overloading-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of function overloading;
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under interface message-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain interface message-efficiency monitoring histogram; Byte number by more described interface message-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of interface message;
Step 4: obtain best degree of parallelism
The thick degree of parallelism P recording in histogram according to the filtration postbyte number under different degree of parallelisms
slightly, and at thick degree of parallelism P
slightlyboth sides with the record of the read-write efficiency byte number that reduces by 2 degree of parallelism units and carry out at every turn, to obtain best degree of parallelism P
essence; When obtaining best degree of parallelism P
slightlyafter, the program of moving on application platform will be according to P
slightlyrestart step 1 to the operation of step 4, until application program end of run;
Obtaining best degree of parallelism P
slightlyafter, application program can be carried out initiatively and passive dynamic self-adapting, so just can improve I/O bandwidth, also can make application program obtain the throughput of larger acceleration effect and Geng Gao simultaneously.
The present invention can perception storage system I/O bandwidth the advantage of program parallelization degree control method be:
1. the present invention is directed to the application of I/O intensity, by the I/O efficiency of monitoring application program, can make application program obtain the throughput of larger acceleration effect and Geng Gao.
The method of the dynamic self-adapting that 2. the present invention combines with passive adjustment with active accommodation is obtained the degree of parallelism of maximum I/O efficiency, can adjust accordingly according to the variation of system load the best degree of parallelism of application program.
3. degree of parallelism control method of the present invention, with respect to traditional feedback, does not rely on outside input reference quantity, and reference quantity is progressively to be determined by the relativeness between adjustment process and the change of I/O efficiency.
4. the active accommodation in the present invention is the strategy not having in traditional feedback control technology, and active accommodation can effectively reduce because external environment condition changes has to carry out the negative effect that passive adjustment brings.
Accompanying drawing explanation
Fig. 1 is the different conditions schematic diagram of the program moved on application platform of the present invention.
Fig. 2 is program parallelization degree control flow schematic diagram that can perception memory device bandwidth of the present invention.
Fig. 3 A is that the present invention adopts degree of parallelism to carry out the histogram of location fast.
Fig. 3 B is the histogram that the present invention adopts the contrary degree of parallelism after flex point.
Fig. 4 is active of the present invention and the schematic diagram of passive adjustment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Figure 1, the program of moving on application platform can be divided into three states, i.e. initial state, stable state and final state according to program I/O efficiency.
Initial state refers to a kind of state when application program is opened with lower degree of parallelism operation.
Stable state refers to a kind of state when application program enters stable operation after initial state.
Final state refers to a kind of state when application program is moved through maintaining higher I/O efficiency after stable state.
Conversion regime between initial state and stable state is designated as quick location, and described quick location refers to the process that increases degree of parallelism by 2 exponential depth rule.
Conversion regime between stable state and final state is designated as fine setting, and described fine setting refers near the process that detects best degree of parallelism when stable state determined degree of parallelism value.
Conversion regime between final state and stable state is designated as active accommodation, and what described active accommodation referred to periodic triggers unconditionally transfers application program the operation of stable state to from final state.
Conversion regime between final state and initial state is designated as passive adjustment, and described passive adjustment refers to that application program I/O efficiency change rate when final state triggers while surpassing threshold value transfers application program to the operation of initial state from final state.
Shown in Figure 2, the present invention is a kind of program parallelization degree control method that can perception memory device bandwidth, the method is adaptive according to the comprehensive hardware condition of different application platform and real-time load state, dynamically determine the best I/O efficiency performance that application program can obtain, and program parallelization degree control method that can perception memory device bandwidth.Described program parallelization degree control method includes following treatment step:
Step 1: the real-time monitoring of I/O efficiency
In the present invention, the number of establishing the I/O efficiency monitoring time is q, and first I/O efficiency monitoring time is designated as T
1, second I/O efficiency monitoring time is designated as T
2, last I/O efficiency monitoring time is designated as T
q.For convenience of description, any one I/O efficiency monitoring time is designated as to T
i, described T
ithe last I/O efficiency monitoring time be called T
i-1, described T
ithe rear I/O efficiency monitoring time be called T
i+1.The program of moving on application platform is designated as to T from initial state to stable state to the working time of final state
always(referred to as application program working time).At a T
alwaysto have a plurality of I/O efficiency monitoring time, i.e. T in section working time
always=T
1+ T
2+ ... + T
i-1+ T
i+ T
i+1+ ... + T
q.The time interval between adjacent two I/O efficiency monitoring times is designated as T
p, usually set
Step 101: the byte number of the read/write function of recording address intercepting-efficiency monitoring
In first I/O efficiency monitoring time T
1in, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
in the present invention, the read/write function mark that adopts address interception way to carry out is in order to complete system-level I/O efficiency monitoring, to have, at T
1the byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In like manner can obtain, second I/O efficiency monitoring time T
2in, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
2the byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i I/O efficiency monitoring time T
iin, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
ithe byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i+1 I/O efficiency monitoring time T
i+1in, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
i+1the byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In like manner can obtain, in the end an I/O efficiency monitoring time T
qin, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
qthe byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of all addresses intercepting-efficiency monitoring is designated as
referred to as address intercepting-efficiency monitoring-byte number
In the present invention, the read/write function mark that adopts address interception way to carry out is in order to complete system-level I/O efficiency monitoring.
Step 102: the byte number that records the read/write function of function overloading-efficiency monitoring
In first I/O efficiency monitoring time T
1in, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
1the byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
In like manner can obtain, second I/O efficiency monitoring time T
2in, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
2the byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i I/O efficiency monitoring time T
iin, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
ithe byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i+1 I/O efficiency monitoring time T
i+1in, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
i+1the byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
In like manner can obtain, in the end an I/O efficiency monitoring time T
qin, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
qthe byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of all function overloading-efficiency monitorings is designated as
referred to as function overloading-efficiency monitoring-byte number
Step 103: the byte number of the read/write function of record interface information-efficiency monitoring
In first I/O efficiency monitoring time T
1in, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
1the byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
In like manner can obtain, second I/O efficiency monitoring time T
2in, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
2the byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i I/O efficiency monitoring time T
iin, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
ithe byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
In like manner can obtain, i+1 I/O efficiency monitoring time T
i+1in, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
i+1the byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
In like manner can obtain, in the end two I/O efficiency monitoring time T
qin, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
qthe byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of total interface information-efficiency monitoring is designated as
referred to as interface message-efficiency monitoring-byte number
In the present invention, the monitoring of I/O efficiency is adopted to multiple means, this is conducive to adapt to the user's request under different application scene.
Step 2: the denoising of the byte number of read/write function
During application program operation, include different I/O efficiency monitoring type MODE, in the present invention, described MODE includes address intercepting-efficiency monitoring type SYS, function overloading-efficiency monitoring type USR and interface message-efficiency monitoring type i NT, i.e. MODE={SYS, USR, INT}.
According to denoising condition
the byte number of read/write function is carried out to filtering interfering processing, obtain filtering postbyte number.If being " 1 ", value chooses
and carry out degree of parallelism extraction process, then locate fast, if being " 0 ", value abandons
degree of parallelism extract, directly locate fast.
Q represents the number of I/O efficiency monitoring time;
I represents any one I/O efficiency monitoring time;
C
threshold valuethe critical value that represents the judgement wave phenomenon generation that denoising arranges.
In the present invention, according to denoising condition E to address intercepting-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
In the present invention, according to denoising condition E to function overloading-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
In the present invention, according to denoising condition E docking port information-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
In the present invention, adopt denoising condition to distinguish and disturb and normal I/O efficiency change, the characteristic that denoising condition characterizes is exactly the continuity of time, disturbs instantaneously often, when continuous interference occurs, can be referred to as to fluctuate.By the unified processing of above-mentioned multiple read/write function, can carry out the monitoring of I/O efficiency with the read-write efficiency in a plurality of continuous unit interval.
Step 3: the quick location of degree of parallelism
Shown in Fig. 3 A, Fig. 3 B, in the present invention, using degree of parallelism P as horizontal ordinate, i.e. the process of corresponding application program or number of threads, the byte number that ordinate is read/write function, sets up the histogram of I/O efficiency monitoring.
The value of described degree of parallelism P is 2 power, has P=1,2,4,8 ..., 2
p, p represents exponential.Application program brings into operation with degree of parallelism P=1 after opening, and the filtration postbyte number scale of obtaining under the condition of P=1 is
after value P=1, degree of parallelism is according to P=2
poperation, and obtain filtering postbyte number scale and be
According to degree of parallelism, from little to greatly the filtration postbyte number different degree of parallelisms being carried out to histogram structure, obtain degree of parallelism-I/O efficiency histogram; Byte number by more described degree of parallelism-I/O efficiency histogram, selects maximum number of byte
this maximum number of byte
be the flex point of I/O efficiency monitoring, as shown in Figure 3A.
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=1, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=2, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=4, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=8, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=16, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=32, be
By degree of parallelism P=2
pcondition under address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain address intercepting-efficiency monitoring histogram; Byte number by the intercepting-efficiency monitoring histogram of more described address, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of address intercepting.
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under function overloading-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain function overloading-efficiency monitoring histogram; Byte number by more described function overloading-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of function overloading.
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under interface message-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain interface message-efficiency monitoring histogram; Byte number by more described interface message-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of interface message.The degree of parallelism P at described flex point place is designated as thick degree of parallelism P
slightly.
In the present invention, in conjunction with the state machine in Fig. 1, represent to be described below, when application program is opened, in initial state, after the process of quick location, enter afterwards stable state, final state.Below in conjunction with Fig. 3 A, describe, according to mentioned above principle application program, with degree of parallelism 1,2,4,8,16,32, move successively, degree of parallelism increases with exponential law, the I/O efficiency that can see application program increases successively, while applying afterwards with degree of parallelism 16 operation, can see that I/O efficiency starts to reduce, in order to guarantee certain reliability, continue to increase degree of parallelism to 32, I/O efficiency does not have the trend of recovering, so, just no longer increasing degree of parallelism and can obtaining I/O efficiency performance flex point is degree of parallelism 8, i.e. P
slightly=8.
Step 4: obtain best degree of parallelism
At Fig. 3 A, there is flex point P
slightlyafter=8, degree of parallelism with less is adjusted to the Linear fine tuning that stride carries out degree of parallelism, to obtain best read-write efficiency, i.e. smart degree of parallelism P
essence.In conjunction with the state machine in Fig. 1, represent to be described below, application program enters after stable state, through the process of finely tuning, enters final state.Below in conjunction with Fig. 3 B, describe, according to mentioned above principle application program at flex point P
slightlyfinely tune to reduce by 2 degree of parallelism units at every turn on=8 both sides, the method of using in figure is to start to reduce successively 2 degree of parallelism unit's linear decreases from degree of parallelism 14 at every turn, until degree of parallelism is down to 4, can be clear that the smart degree of parallelism P that obtains best I/O performance
essence10(P in fact
essence=10), application program will be with best degree of parallelism P afterwards
essence=10 operations of read/write function again.In the present invention, described best degree of parallelism P
essencefine setting be at thick degree of parallelism P
slightlyboth sides with the record of the read-write efficiency byte number that reduces by 2 degree of parallelism units and carry out at every turn.
In the present invention, degree of parallelism fine setting being obtained is designated as best degree of parallelism P
essence.When obtaining best degree of parallelism P
essenceafter, the program of moving on application platform will be according to P
essencerestart step 1 to the operation of step 4, until application program end of run.Obtaining best degree of parallelism P
essenceafter, application program can be carried out initiatively and passive dynamic self-adapting, so just can improve I/O bandwidth, also can make application program obtain the throughput of larger acceleration effect and Geng Gao simultaneously.
The present invention proposes can perception memory device bandwidth program parallelization degree control method be to bring into operation until application program ends up being a control procedure from application program.
The dynamic self-adapting of best degree of parallelism
(1) initiatively self-adaptation adjustment: in the present invention, what described active accommodation referred to periodic triggers unconditionally transfers application program the operation of stable state to from final state.The status mechanism conversion of application program operation has initial state, stable state and final state.When obtaining best degree of parallelism P
essenceafter, final state is carried out the real-time monitoring of I/O efficiency to stable state with active accommodation, and then carry out step 2 to the re-treatment of step 4.In conjunction with the state machine in Fig. 1, represent to be described below, application program is after entering final state, when active accommodation is triggered, by the unconditional stable state that enters.In this process, only with best degree of parallelism P
essencecarry out step 1 to the processing of step 4, to obtain the real-time change of the I/O bandwidth of application program, also can make application program obtain the throughput of larger acceleration effect and Geng Gao simultaneously.
(2) passive self-adaptation adjustment: in the present invention, described passive adjustment refers to that application program I/O efficiency change rate when final state triggers while surpassing threshold value transfers application program to the operation of initial state from final state.When obtaining best degree of parallelism P
essenceafter, final state is carried out the real-time monitoring of I/O efficiency to initial state with passive adjustment, and then carry out step 2 to the re-treatment of step 4.
Application program on application platform is at best degree of parallelism P
essenceduring lower operation, when the change of the I/O of application program read-write efficiency rate of change B is greater than the threshold parameter B of the given passive adjustment of triggering
threshold valuetime, open immediately the quick location of a new round and the process of fine setting, passive adjustment that Here it is.In conjunction with the state machine in Fig. 1, represent to be described below, application program, after entering final state, when passive adjustment is triggered, enters initial state by unconditional, to trigger the detection process of a new round.
The condition that triggers passive adjustment is B > B
threshold value, and
The technology of active accommodation and passive adjustment is described below in conjunction with Fig. 4, can see application program in the I/O efficiency at I/O efficiency monitoring time T 2 places lower than current threshold value, passive adjustment is triggered, the quick position fixing process of a new round is carried out in application immediately, starts to survey until arrive I/O efficiency monitoring time T 3 to complete detection process arrival final state from lower degree of parallelism.After having adopted active accommodation technology, be applied in I/O efficiency monitoring time T 1 place and just triggered active accommodation, active accommodation only can cause the action of fine setting, after fine setting, in I/O efficiency monitoring time T 3, has reached final state constantly.From above process, can find out, in application, take the initiative after adjustment technology, the active accommodation that application program triggers when T1 can avoid application program when T2, to trigger passive adjustment, thereby make application program to the average I/O efficiency between T3, obtain larger raising at T1, reduced dynamic development adjustment to applying the negative effect of normal operation
For I/O intensive applications, improving throughput is its important performance indexes, it from Physical layer, is exactly the lifting of its I/O efficiency, in order better to control I/O efficiency, can offer using the I/O efficiency of application as feedback information user's application, by feedback regulation mechanism, maximize I/O efficiency information.In feedback regulation mechanism, treat and adjust input to obtain original output by the adjustment algorithm of controller, and original output and difference with reference to output are offered to controller as feedback quantity use, to finally obtaining being bordering on most the output of reference quantity.
Claims (4)
1. a program parallelization degree control method that can perception memory device bandwidth, the program of moving on application platform can be divided into three states, i.e. initial state, stable state and final state according to program I/O efficiency;
Initial state refers to a kind of state when application program is opened with lower degree of parallelism operation;
Stable state refers to a kind of state when application program enters stable operation after initial state;
Final state refers to a kind of state when application program is moved through maintaining higher I/O efficiency after stable state;
It is characterized in that: described program parallelization degree control method includes following treatment step:
Step 1: the real-time monitoring of I/O efficiency
Step 101: the byte number of the read/write function of recording address intercepting-efficiency monitoring
I I/O efficiency monitoring time T
iin, adopt the mode of address intercepting, the entrance function read of the read operation that operating system is provided be labeled as with I/O efficiency monitoring read function c_read, and record the byte number that described c_read reads function and be designated as
the entrance function write of the write operation that operating system is provided be labeled as with I/O efficiency monitoring write function c_write, and record the byte number that described c_write writes function and be designated as
have, at T
ithe byte number of the read/write function of the address intercepting-efficiency monitoring under condition is expressed as with set
In application program running time T
alwaysunder condition, the byte number of the read/write function of all addresses intercepting-efficiency monitoring is designated as
referred to as address intercepting-efficiency monitoring-byte number
Step 102: the byte number that records the read/write function of function overloading-efficiency monitoring
I+1 I/O efficiency monitoring time T
i+1in, adopt function overloading mode to provide reading function u_read and writing function u_write with monitoring function to user; The byte number that described u_read reads function is designated as
the byte number that described u_write writes function is designated as
have, at T
i+1the byte number of the read/write function of the function overloading-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of all function overloading-efficiency monitorings is designated as
referred to as function overloading-efficiency monitoring-byte number
Step 103: the byte number of the read/write function of record interface information-efficiency monitoring
I I/O efficiency monitoring time T
iin, the I/O statistical information interface that adopts operating system to provide, carries out the raw data of pre-service kernel generation, and completes the monitoring of I/O efficiency, and the system monitoring obtaining is read function s_read and is write function s_write; The byte number that described s_read reads function is designated as
the byte number that described s_write writes function is designated as
have, at T
ithe byte number of the read/write function of the interface message-efficiency monitoring under condition is expressed as with set
At T
alwaysunder condition, the byte number of the read/write function of total interface information-efficiency monitoring is designated as
referred to as interface message-efficiency monitoring-byte number
Step 2: the denoising of the byte number of read/write function
During application program operation, include different I/O efficiency monitoring type MODE, be that MODE includes address intercepting-efficiency monitoring type SYS, function overloading-efficiency monitoring type USR and interface message-efficiency monitoring type i NT, be MODE={SYS, USR, INT};
According to denoising condition
the byte number of read/write function is carried out to filtering interfering processing, obtain filtering postbyte number; If being " 1 ", value chooses
and carry out degree of parallelism extraction process, then locate fast, if being " 0 ", value abandons
degree of parallelism extract, directly locate fast;
Q represents the number of I/O efficiency monitoring time;
I represents any one I/O efficiency monitoring time;
C
threshold valuethe critical value that represents the judgement wave phenomenon generation that denoising arranges;
According to denoising condition E to address intercepting-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
According to denoising condition E to function overloading-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
According to denoising condition E docking port information-efficiency monitoring-byte number
denoising after, the function overloading-efficiency monitoring obtaining-filtration postbyte number scale is
Step 3: the quick location of degree of parallelism
The value of described degree of parallelism P is 2 power, has P=1,2,4,8 ..., 2
p, p represents exponential; Application program brings into operation with degree of parallelism P=1 after opening, and the filtration postbyte number scale of obtaining under the condition of P=1 is
after value P=1, degree of parallelism is according to P=2
poperation, and obtain filtering postbyte number scale and be
According to degree of parallelism, from little to greatly the filtration postbyte number different degree of parallelisms being carried out to histogram structure, obtain degree of parallelism-I/O efficiency histogram; Byte number by more described degree of parallelism-I/O efficiency histogram, selects maximum number of byte
this maximum number of byte
be the flex point of I/O efficiency monitoring, as shown in Figure 3A;
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=1, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=2, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=4, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=8, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=16, be
By address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining under the condition of degree of parallelism P=32, be
By degree of parallelism P=2
pcondition under address intercepting-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain address intercepting-efficiency monitoring histogram; Byte number by the intercepting-efficiency monitoring histogram of more described address, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of address intercepting;
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By function overloading-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under function overloading-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain function overloading-efficiency monitoring histogram; Byte number by more described function overloading-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of function overloading;
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=1-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=2-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=4-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=8-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=16-filtration postbyte number scale, be
By interface message-efficiency monitoring of obtaining under the condition of degree of parallelism P=32-filtration postbyte number scale, be
By degree of parallelism P=2
pcondition under interface message-efficiency monitoring-filtration postbyte number scale of obtaining be
Filtration postbyte number under different degree of parallelisms is written into and take degree of parallelism P as horizontal ordinate, in the histogram that byte number is ordinate, obtain interface message-efficiency monitoring histogram; Byte number by more described interface message-efficiency monitoring histogram, selects maximum number of byte
this maximum number of byte
it is the flex point of the I/O efficiency monitoring of interface message;
Step 4: obtain best degree of parallelism
The thick degree of parallelism P recording in histogram according to the filtration postbyte number under different degree of parallelisms
slightly, and at thick degree of parallelism P
slightlyboth sides with the record of the read-write efficiency byte number that reduces by 2 degree of parallelism units and carry out at every turn, to obtain best degree of parallelism P
essence; When obtaining best degree of parallelism P
slightlyafter, the program of moving on application platform will be according to P
slightlyrestart step 1 to the operation of step 4, until application program end of run;
Obtaining best degree of parallelism P
slightlyafter, application program can be carried out initiatively and passive dynamic self-adapting, so just can improve I/O bandwidth, also can make application program obtain the throughput of larger acceleration effect and Geng Gao simultaneously.
2. program parallelization degree control method that can perception memory device bandwidth according to claim 1, is characterized in that: the active self-adaptation that application program is carried out is adjusted into: when obtaining best degree of parallelism P
essenceafter, final state is carried out the real-time monitoring of I/O efficiency to stable state with active accommodation, and then carry out step 2 to the re-treatment of step 4.
3. program parallelization degree control method that can perception memory device bandwidth according to claim 1, is characterized in that: the passive self-adaptation that application program is carried out is adjusted into: when obtaining best degree of parallelism P
essenceafter, final state is carried out the real-time monitoring of I/O efficiency to initial state with passive adjustment, and then carry out step 2 to the re-treatment of step 4; Application program on application platform is at best degree of parallelism P
essenceduring lower operation, when the change of the I/O of application program read-write efficiency rate of change B is greater than the threshold parameter B of the given passive adjustment of triggering
threshold valuetime, open immediately the quick location of a new round and the process of fine setting; The condition that triggers passive adjustment is B > B
threshold value, and
be illustrated in I/O efficiency monitoring time T
iunder condition, the byte number of the read/write function of any I/O efficiency monitoring type MODE,
be illustrated in I/O efficiency monitoring time T
i+1under condition, the byte number of the read/write function of any I/O efficiency monitoring type MODE.
4. program parallelization degree control method that can perception memory device bandwidth according to claim 1, it is characterized in that: the method is adaptive according to the comprehensive hardware condition of different application platform and real-time load state, dynamically determine the best I/O efficiency performance that application program can obtain, and program parallelization degree control method that can perception memory device bandwidth.
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