Single exponent testing on MultiCore

graizada · 2013-02-05, 11:34

Hi,

When I start mprime, it asks to start as many workers as there are cores. I want to use all cores for the same exponent. Essentially dedicating the entire server to single exponent to speed up.

I looked in readme and on this forum. All I find is mlucas. Can you guide me on this ?

G

LaurV · 2013-02-05, 13:51

Stop mprime,

On local.txt file, look for something like
WorkerThreads=xxx
ThreadsPerTest=yyy

replace xxx with 1, and yyy with the number of your physical cores

then look to worktodo.txt and eliminate the heders [worker xx] in case you have them from a former run, let only the [worker 1]. If no worktodo yet, no problem.

Restart mprime.

Linux users may clarify it better.

Dubslow · 2013-02-05, 14:29

Quote:

Originally Posted by LaurV

Stop mprime,

On local.txt file, look for something like
WorkerThreads=xxx
ThreadsPerTest=yyy

replace xxx with 1, and yyy with the number of your physical cores

then look to worktodo.txt and eliminate the heders [worker xx] in case you have them from a former run, let only the [worker 1]. If no worktodo yet, no problem.

Restart mprime.

Linux users may clarify it better.

In general though, we recommend only one core per test, because overall you get more work done; using multithreading is never quite as efficient as a single core per test.

Xyzzy · 2013-02-05, 14:36

Code:

./mprime -m

Option #2

2013-02-05, 11:34	#1
graizada Feb 2013 1 Posts	Single exponent testing on MultiCore Hi, When I start mprime, it asks to start as many workers as there are cores. I want to use all cores for the same exponent. Essentially dedicating the entire server to single exponent to speed up. I looked in readme and on this forum. All I find is mlucas. Can you guide me on this ? G

2013-02-05, 14:36	#4
Xyzzy "Mike" Aug 2002 2020₁₆ Posts	Code: ./mprime -m Option #2

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2013-02-05, 13:51	#2
LaurV Romulan Interpreter Jun 2011 Thailand 7×1,373 Posts	Stop mprime, On local.txt file, look for something like WorkerThreads=xxx ThreadsPerTest=yyy replace xxx with 1, and yyy with the number of your physical cores then look to worktodo.txt and eliminate the heders [worker xx] in case you have them from a former run, let only the [worker 1]. If no worktodo yet, no problem. Restart mprime. Linux users may clarify it better.