mfakto: an OpenCL program for Mersenne prefactoring - Page 38

Bdot · 2012-03-16, 10:10

AMD released Catalyst version 12.2. I have it running on two W7-64 machines and the first tests went well. I'll do a few tests on Linux later, but I'd say, this time no new bugs interfere with mfakto.

bcp19 · 2012-03-30, 21:08

Has anyone tried the new 12.3 catalyst version yet?

flashjh · 2012-03-30, 22:12

Quote:

Originally Posted by bcp19

Has anyone tried the new 12.3 catalyst version yet?

Not yet, but 12.2 caused blue screens for me.

KyleAskine · 2012-03-31, 00:11

Quote:

Originally Posted by flashjh

Not yet, but 12.2 caused blue screens for me.

Odd. 12.2 works perfectly for me on all boxes.

flashjh · 2012-03-31, 00:16

Quote:

Originally Posted by KyleAskine

Odd. 12.2 works perfectly for me on all boxes.

I never spent any time t/s'ing the problem, I've been too busy. It was easier to revert and key it go. Is 12.2/.3 faster for you?

chair · 2012-03-31, 07:54

Thanks for the help bdot, i was able to get the 2nd instances running.

bcp19 · 2012-03-31, 13:40

Bdot, when running some tests using mfakto yesterday, I noticed that when I used the first half of the following in a batch file that the program only ran at about 2/3 the speed as when I ran the second half.

Code:

c:
cd mfakto
cmd.exe /k "start /b /low /affinity 0x08 mfakto-x64.exe"
 
vs
 
c:
cd mfakto
mfakto-x64.exe

Any thoughts?

Dubslow · 2012-03-31, 13:51

This can't really account for speed, but if you're launching it from a batch file, calling cmd.exe shouldn't be necessary. This is what I use (developed by kladner):

Code:

C:
cd C:\Users\Bill\GPU-Prime95\mfaktc-0.17
start /low /affinity 8 mfaktc-win-64

bcp19 · 2012-03-31, 14:32

I'd like to work up some charts for GPUs running mfakto to determine how well they work once the cores running them are factored in.

If you could PM me: CPU and GPU model (Q8200/5770), # cores running P95/mfakto (1/3, 2/2, 5/1), exp size and iter time on P95 cores (45381221/.059ms, 26202373/.035ms), exponent size, bit level and rough avg time for each mfakto instance (30311929/68-69/74m29s, 30363997/68-69/73m52s, 29499839/69-70/162m11s) it would be a great help. Thanks in advance for your help.

kladner · 2012-03-31, 16:53

Quote:

Originally Posted by bcp19

Bdot, when running some tests using mfakto yesterday, I noticed that when I used the first half of the following in a batch file that the program only ran at about 2/3 the speed as when I ran the second half.

Just for grins, you might take out the /low, or replace it with /high. It might show if something else is stealing CPU cycles from mfakto. Since the second batch defaults to /normal, I guess that would be the best comparison. Affinity is the other variable, so that might make a difference, too.

KyleAskine · 2012-03-31, 17:46

Quote:

Originally Posted by flashjh

I never spent any time t/s'ing the problem, I've been too busy. It was easier to revert and key it go. Is 12.2/.3 faster for you?

Not really. About the same as 12.1

2012-03-16, 10:10	#408
Bdot Nov 2010 Germany 1001010101₂ Posts	Catalyst 12.2 seems to work well AMD released Catalyst version 12.2. I have it running on two W7-64 machines and the first tests went well. I'll do a few tests on Linux later, but I'd say, this time no new bugs interfere with mfakto.

2012-03-31, 13:40	#414
bcp19 Oct 2011 7·97 Posts	Bdot, when running some tests using mfakto yesterday, I noticed that when I used the first half of the following in a batch file that the program only ran at about 2/3 the speed as when I ran the second half. Code: c: cd mfakto cmd.exe /k "start /b /low /affinity 0x08 mfakto-x64.exe" vs c: cd mfakto mfakto-x64.exe Any thoughts? Last fiddled with by bcp19 on 2012-03-31 at 13:40

2012-03-31, 13:51	#415
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 1110000110101₂ Posts	This can't really account for speed, but if you're launching it from a batch file, calling cmd.exe shouldn't be necessary. This is what I use (developed by kladner): Code: C: cd C:\Users\Bill\GPU-Prime95\mfaktc-0.17 start /low /affinity 8 mfaktc-win-64

2012-03-31, 14:32	#416
bcp19 Oct 2011 7·97 Posts	Looking for data I'd like to work up some charts for GPUs running mfakto to determine how well they work once the cores running them are factored in. If you could PM me: CPU and GPU model (Q8200/5770), # cores running P95/mfakto (1/3, 2/2, 5/1), exp size and iter time on P95 cores (45381221/.059ms, 26202373/.035ms), exponent size, bit level and rough avg time for each mfakto instance (30311929/68-69/74m29s, 30363997/68-69/73m52s, 29499839/69-70/162m11s) it would be a great help. Thanks in advance for your help.

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2012-03-30, 21:08	#409
bcp19 Oct 2011 679₁₀ Posts	Has anyone tried the new 12.3 catalyst version yet?

2012-03-31, 07:54	#413
chair Feb 2012 2 Posts	Thanks for the help bdot, i was able to get the 2nd instances running.