Vers. 22.3 My AMD XP 2000+ states:
20:05 Iteration 21818560 20:19 Iteration 21821886 Per Iteration time 0.245 sec. So the "Per Iteration time" seems about right, but how come my 1.666 GHz CPU is so slow compared to Jud's 1.3 GHz CPU? I set it to use 128 MB RAM, is that amount too small? I'm currently running a 33,000,000 exponent if that is of any issue here. (Maybe the per iteration time increases with the size of the exponent to test?) regards, Oli ----- Original Message ----- From: "George Woltman" <[EMAIL PROTECTED]> To: "Jud McCranie" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Sunday, May 26, 2002 7:53 PM Subject: Re: Mersenne: time per iteration > At 12:43 PM 5/26/2002 -0400, Jud McCranie wrote: > >I've been off the mailing list for a while. I just went from ver 21.4 to > >22.3 and the calculation of time per iteration seems to be off. I'm > >running a 15,000,000 exponent on a 1.3 GHz Athlon. It shows (what would > >be) a remarkable 0.037 sec per iteration, but it takes about 13 minutes > >for 6000 iterations, which is actually 0.13 sec/iter, 3.5 times as > >much. The expected completion dates under Status look right. > >Is there a bug in the per iteration calculation in ver 22.3? > > Sure looks like a bug. One of the changes in version 22 is the use of the > Windows > QueryPerformanceCounter system call rather than RDTSC to time each iteration. > Another change is that prime95 automatically deduces your CPU speed and type. > > Please email me your prime.ini and local.ini files and the output of the > Options/CPU dialog box (hint - you can do Options/Benchmark and the > cpu information will be written to results.txt). > > I'm also interested in hearing from any other users that find version 22.3 > is not > detecting their CPU type and speed properly. > > _________________________________________________________________________ > Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm > Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers > _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
