Author: Aaron Gordon
Date: 03:05:52 06/18/03
Go up one level in this thread
On June 18, 2003 at 00:23:04, Jeremiah Penery wrote:
>On June 17, 2003 at 19:01:25, Aaron Gordon wrote:
>
>>On June 17, 2003 at 01:41:59, Jeremiah Penery wrote:
>>
>>>On June 16, 2003 at 23:17:12, Jay Urbanski wrote:
>>>
>>>>On June 15, 2003 at 19:04:02, Vincent Lejeune wrote:
>>>>
>>>>>Could we get result for 2 crafty bench in same time (one by CPU), please ?
>>>>
>>>>Sure.
>>>>
>>>>CPU 0
>>>>Raw nodes per second: 1150676
>>>
>>>>CPU 1
>>>>Raw nodes per second: 1150676
>>>
>>>
>>>That's almost impossible to believe.
>>
>>My dual Athlon shows the same almost.. check out my previous post to Hyatt.
>>
>>http://www.talkchess.com/forums/1/message.html?300395
>>
>>1.995x speedup running two copies of Crafty, one per cpu. 1.6x speedup with 1
>>Crafty, 2 cpus. This is a Crafty problem however and it's also occuring on
>>Hyatt's dual Xeon system.. he's currently looking into the problem.
>
>Your system shows *identical* NPS for 2 concurrent bench tests?
Yes. I think Crafty has an inaccurate timer. Like taking 28718972 nodes (for
example) and dividing it by 15, 16, 17 (seconds). Would be better if Hyatt used
a more precise timer I believe. Not sure what, but, this old one is the one I
always use... I'm sure he's got something better. Just incase, here you go...
For Unix/Linux:
#include <sys/time.h>
#include <sys/resource.h>
#ifdef hpux
#include <sys/syscall.h>
#define getrusage(a,b) syscall(SYS_getrusage,a,b)
#endif
struct rusage rusage;
dtime(p)
double p[];
{
double q;
q = p[2];
getrusage(RUSAGE_SELF,&rusage);
p[2] = (double)(rusage.ru_utime.tv_sec);
p[2] = p[2] + (double)(rusage.ru_utime.tv_usec) * 1.0e-06;
p[1] = p[2] - q;
return 0;
}
For Win32:
#ifdef WIN32
#include <windows.h>
dtime(p)
double p[];
{
double q;
q = p[2];
p[2] = (double)GetTickCount() * 1.0e-03;
p[1] = p[2] - q;
return 0;
}
#endif
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