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Old 2011-02-05, 16:34   #1
Christenson
 
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Post 6 CPU cores not recognized by Prime95 v25.11.8

I have that newly constructed AMD Phenom II x6 six core CPU system discussed over in the hardware thread. It's working, and prime95 is happy to use 4 of the six cores full time. However, I had some trouble configuring through the menus to get all six cores into use, the system kept insisting I had only 4 cores. I went ahead and edited local.txt, but I think it got re-written at least once back down to 4 cores, and the menus don't want to let me configure for more than 4 threads.

I assume this is an issue with prime95, as lots of other things, including BOINC, have no trouble with identifying six CPUs.
./mprime -v reports v25.11.8.
xubuntu revision is 10.10.
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Old 2011-02-05, 16:45   #2
Uncwilly
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Can you run CPU-Z and post the results?
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Old 2011-02-05, 17:55   #3
ET_
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Quote:
Originally Posted by Christenson View Post
I have that newly constructed AMD Phenom II x6 six core CPU system discussed over in the hardware thread. It's working, and prime95 is happy to use 4 of the six cores full time. However, I had some trouble configuring through the menus to get all six cores into use, the system kept insisting I had only 4 cores. I went ahead and edited local.txt, but I think it got re-written at least once back down to 4 cores, and the menus don't want to let me configure for more than 4 threads.

I assume this is an issue with prime95, as lots of other things, including BOINC, have no trouble with identifying six CPUs.
./mprime -v reports v25.11.8.
xubuntu revision is 10.10.
Try mprime version 26.4

Luigi
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Old 2011-02-05, 18:37   #4
Prime95
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Quote:
Originally Posted by ET_ View Post
Try mprime version 26.4
If that doesn't work, let me know.

You can override prime95's calculation of the number of cores available. Look in undoc.txt for the NumCPUS setting.
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Old 2011-02-06, 01:03   #5
Christenson
 
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UncWilly...this box isn't going to run Windoze...so I need help locating CPU-Z.
Prime95: I simply overrode prime95s NumCPUs and Numthreads calculations...that works...though I do still get complaints about having more threads in the config file than I am running. I got the AMD64 version of mprime from the www.mersenne.org website just a few days ago.

Can you tell me if there is a perfomance advantage to running 26.4?

P.S. Tried to download 26.4 (linux, 64-bit) from the Software forum link, am getting server timeouts, so trying that will have to wait. Or should I try 26.5, and simply pop into it briefly, given that I have a bunch of work in progress and am running all six cores on prime95?

Last fiddled with by Christenson on 2011-02-06 at 01:12 Reason: Couldn´t download 26.4 linux-64.tar.gz
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