代码基准统计 –

正如我在上一个主题中所写的那样:
Benchmarking code – am I doing it right?我需要找到一种方法来获得基准统计数据,如平均值,平均值,标准差等.如何使用我发布的方法执行此操作?请注意,我使用一种解决方案来对代码进行时间间隔测试,而不是多次调用函数.有任何想法吗?

我想出了一个,不知道它是否正确(伪代码):

buffsize = 1024;
buffer [buffsize];
totalcycles = 0

// arrays
walltimeresults = []
cputimeresults = []

// benchmarking
for i in (0, iterations):
   start = walltime();
   fun2measure(args, buffer);
   end = walltime();
   walltimeresults[i] = end - start;

   start = cputime();
   fun2measure(args, buffer);
   end = cputime();
   cputimeresults[i] = end - start;

   c1 = cyclecount();
   fun2measure(args, buffer);
   c2 = cyclecount();

   cyclesperbyte = c2-c1/(buffsize);
   totalcycles += cyclesperbyte;

for i in range (0, iterations) : sum += walltimeresults[i];
avg_wall_time = sum / iterations;

sum = 0;

for i in range (0, iterations) : sum += cputimeresults[i];
avg_cpu_time = sum / iterations;

avg_cycles = totalcycles / iterations;

这是对的吗?平均值,标准偏差等怎么样?

最佳答案 你的平均看起来不错.

平均值(即平均值)是

mean = 1/N * sum( x[i] )

标准差是方差的平方根:

sigma = sqrt( 1/N * sum( (x[i]-mean)^2 )
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