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| #include <sys/time.h>
#include <sys/resource.h>
#include <iostream>
using namespace std;
int main()
{
struct rusage usage_before, usage_after;
cout << "--- CPU processing" << endl;
for (int i=0; i < 100; ++i)
{
getrusage(RUSAGE_THREAD, &usage_before);
// Some dumb CPU processing
char a;
for (int k=0; k < (i * 100000); ++k)
{
++a;
}
getrusage(RUSAGE_THREAD, &usage_after);
cout << i << " : " << usage_after.ru_utime.tv_sec - usage_before.ru_utime.tv_sec << "s "
<< usage_after.ru_utime.tv_usec - usage_before.ru_utime.tv_usec << "us " << endl;
}
return 0;
} |
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