How to set dhrystone benchmark clock rate for emulator? - linux

Question

I usually use sysconfig(_SC_CLK_TCK) in linux to get the clock rate (which always returns 100). The problem is I want to use dhrystone benchmark with Atari Mint (TOS). I installed atari mint on an emulator called ARanyM. I used sysconfig(_SC_CLK_TCK) here also but it return something like 4294967295 (this actually all 1 value in 32-bit)
Does any body has any suggestions ?

Answer 1

With Linux I use:
#include <time.h>
double theseSecs = 0.0;
double startSecs = 0.0;
double secs;
double CPUsecs = 0.0;
double CPUutilisation = 0.0;
double answer = 0;
clock_t starts;
void start_CPU_time()
{
starts = clock();;
return;
}
void end_CPU_time()
{
CPUsecs = (double)(clock() - starts)/(double)CLOCKS_PER_SEC;
return;
}
struct timespec tp1;
void getSecs()
{
clock_gettime(CLOCK_REALTIME, &tp1);
theseSecs = tp1.tv_sec + tp1.tv_nsec / 1e9;
return;
}
void start_time()
{
getSecs();
startSecs = theseSecs;
return;
}
void end_time()
{
getSecs();
secs = theseSecs - startSecs;
return;
}
void calculate()
{
int i, j;
for (i=1, i<1000001; i++)
{
for (i=j, j<1000001; j++)
{
answer = answer * (float)i / 1000000.0;
}
}
}
void main()
{
start_time();
start_CPU_time();
calculate();
end_time();
end_CPU_time();
CPUutilisation = CPUsecs / secs / 100.0;
printf"/n Answer %8.3f, Elapsed Time %7.4f, CPU Time %7.4f,
CPU Utilisation %8.4f/n, answer, secs, CPUsecs, CPUutilisation);
}