Re: Mersenne: Setu for Dual processor NT
Use the -A switch (see the readme) to configure a separate image of the EXE. ALso set the affinity (under advanced) when it is running so the processor preference will be set in the control file (one image per processor). Expect the speed to slow down per instance.. if I run one image it gets .22/LL if I run two images they get .25/LL if I run three images they get .33/LL if I run four images they get .4/LL go figure ... the overhead is a strange curve but at .4/ll with 4 working it takes about 28 days to complete or 7 days each avg. WHere with one at .22 it would be about 16 days for one LL. (if I run factors with the 4 processors they each complete a factor a day) 4 - 500mhz Xeon's w/2MB L2 and 1GB RAM Michael.. "Terry S. Arnold" wrote: I am going to build a dual processor box running NT. How do I set things up so I get copies of Prime 95 running on each processor. I want to get maximum bang out of this combination. Terry Terry S. Arnold 2975 B Street San Diego, CA 92102 USA [EMAIL PROTECTED] (619) 235-8181 (voice) (619) 235-0016 (fax) _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Setu for Dual processor NT
Use the -A switch (see the readme) to configure a separate image of the EXE. ALso set the affinity (under advanced) when it is running so the processor preference will be set in the control file (one image per processor). Is there any way to set the affinity under NT automatically when a service starts up? Some of the machines I run this stuff on are multi-os, and I very often switch between them, which means rebooting a lot. And I never remember to set my affinities by hand againwhen I come back into NT. It just kills performance in NT, tho, if you don't have the affinities set up right. Doe UNIX variants have the same problem? I.E. Naieve timesharing across CPUs with the huge resulting overhead? Just curious. ---Chip \\ ^ // (o o) ---oOO--(_)--OOo | Chip Lynch| Computer Guru| | [EMAIL PROTECTED] || | (703) 465-4176 (w) | (202) 362-7978 (h) | _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Setu for Dual processor NT
If you use the affinity option under advanced it will set the CPU number into the ini file for that image. So if you have 2 CPU and two icons (one using the -A1 switch) then the exe image will use the proper affinity as found in the ini file for that icon. regards Michael.. Chip Lynch wrote: Use the -A switch (see the readme) to configure a separate image of the EXE. ALso set the affinity (under advanced) when it is running so the processor preference will be set in the control file (one image per processor). Is there any way to set the affinity under NT automatically when a service starts up? Some of the machines I run this stuff on are multi-os, and I very often switch between them, which means rebooting a lot. And I never remember to set my affinities by hand againwhen I come back into NT. It just kills performance in NT, tho, if you don't have the affinities set up right. Doe UNIX variants have the same problem? I.E. Naieve timesharing across CPUs with the huge resulting overhead? Just curious. ---Chip \\ ^ // (o o) ---oOO--(_)--OOo | Chip Lynch| Computer Guru| | [EMAIL PROTECTED] || | (703) 465-4176 (w) | (202) 362-7978 (h) | _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: Setu for Dual processor NT
I am going to build a dual processor box running NT. How do I set things up so I get copies of Prime 95 running on each processor. I want to get maximum bang out of this combination. Terry Terry S. Arnold 2975 B Street San Diego, CA 92102 USA [EMAIL PROTECTED] (619) 235-8181 (voice) (619) 235-0016 (fax) _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
