使用GPROF自动执行C程序的配置 [英] Automating the profling of C program using GPROF

问题描述

我正在使用gprof分析矩阵乘法C程序.该C程序具有这样的一般结构；

I am profiling a matrix multiplication C program using gprof. That C program has a general structure like this;

int main()

{

int n;

printf("enter size of square matrices");
scanf("%d", &n);

data(matM); //fill matrices with n x n random data 
data(matN); 

// this is unoptimized algo
matUnopt(int *matM, int *matN, int *MatOut, int size);


// this is optimized algo
matOpt(int *matM, int *matN, int *MatOut, int size);

 return(0);

}   

现在我的个人资料是:

我运行我的可执行文件，将大小设置为100，然后
$ gprof mat gmon.out > analysis1.txt

I run my executable mat, give size as 100 and then
$ gprof mat gmon.out > analysis1.txt

这将生成analysis1.txt，我从此处手动记下matOpt();和matUnopt();的时间

this generate analysis1.txt from where I manually note the timing for matOpt(); and matUnopt();

然后我再次运行可执行文件，并提供n=150，然后提供

Then I again run the executable mat, and give n=150, and then

$  gprof mat gmon.out > analysis2.txt  

这会生成analysis2.txt，从这里我手动记下matOpt();和matUnopt();

this generate analysis2.txt from where I manually note the timing for matOpt(); and matUnopt();

，依此类推.

这是非常耗时且无聊的方式.我想使这个过程自动化.像这样的一些:

This is very time consuming and boring way. I want to automate this procedure. Some this like this:

int main()

{

int n;


for (n=50; n<50000; n++)

{      
  data(matM); //fill matrices with n x n random data 
  data(matN); 

// this is unoptimized algo
matUnopt(int *matM, int *matN, int *MatOut, int size);


 //gprof records the time of completion of matUnopt for the particular value of n, and 
 puts in a file 

 // this is optimized algo
 matOpt(int *matM, int *matN, int *MatOut, int size);


 //gprof records the time of completion of matOpt for the particular value of n, and   
puts in a file 


  }

  return(0);

  }   

一旦应用程序退出，我希望文件中包含如下表格:

Once the application exits, I am expecting a file having a table like this:

run# (x 50)   profiling result (as usual we get from gprof)               

1             matUnopt  time .....
              matOpt    time .....  

2             matUnopt  time .....
              matOpt    time .....  

3             matUnopt  time .....
              matOpt    time .....  

4             matUnopt  time .....
              matOpt    time .....  


and so on.

请注意，上面的分析结果"通常是我们从gprof获得的结果. 重要的是，我有一种自动化的方法来获取可执行文件多次运行的功能时序，而输入大小也不同.

Please note that 'profiling result' above is what we generally get from gprof. the important thing is I have an automated way to get the timing for the functions for multiple runs of the executable, that too with different input size.

此说明只是一个粗略的想法.我很乐意得到与此近似的任何东西.例如，应用程序可能会退出，然后自行重启以获取新的分析结果.那就是我实际上在做的.但我想自动执行此操作.

我如何实现这个目标?

How do I achieve this goal?

推荐答案

您可以使用脚本语言并将大小作为分析二进制文件的参数吗?

Can you use a scripting language and give your size as an argument to the profiling binary?

在c中使用参数的示例:将参数传递给main .

For an example using arguments in c: passing arguments to main.

此bash脚本会自动运行矩阵大小为50到50000的程序.tee命令确保输出已打印并保存在相应的文件中:analysisxxx.txt

This bash script automatically runs your program with a matrix size from 50 till 50000. The tee command makes sure the output is printed and saved in the corresponding file: analysisxxx.txt

#!/bin/bash

for i in {50..50000}
do
    gprof mat gmon.out $i | tee analysis${i}.txt
done

希望这对您有所帮助.

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