Message boards : Number crunching : Performance Tuning
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Profile Laurence
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Message 3880 - Posted: 30 Jul 2016, 11:41:07 UTC

Please post information of performance and tuning here.
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Rasputin42
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Message 3884 - Posted: 30 Jul 2016, 13:28:13 UTC

Is there ANY way, i could run 3 jobs with 4 cores?

The load average running 4 jobs is about 7.
That means, that there is much more work per job, than a single core can process.
Before the multi-core version, i could do it, now i can only use 1 core per job, which is substantially overloaded and therefore slow.

If the aim of game is, to run as fast as possible,this should be implemented.
Alternatively, there could be 2 versions.
One as is and the other as it was before (through plan classes).
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Message 3886 - Posted: 30 Jul 2016, 13:39:28 UTC

Is there ANY way, i could run 3 jobs with 4 cores?

The load average running 4 jobs is about 7.
That means, that there is much more work per job, than a single core can process.
Before the multi-core version, i could do it, now i can only use 1 core per job, which is substantially overloaded and therefore slow.

If the aim of game is, to run as fast as possible,this should be implemented.
Alternatively, there could be 2 versions.
One as is and the other as it was before (through plan classes).

EDIT: Theory jobs
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Ben Segal
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Message 3887 - Posted: 30 Jul 2016, 13:42:04 UTC - in response to Message 3886.  
Last modified: 30 Jul 2016, 13:43:28 UTC

Is there ANY way, i could run 3 jobs with 4 cores?

The load average running 4 jobs is about 7.
That means, that there is much more work per job, than a single core can process.
Before the multi-core version, i could do it, now i can only use 1 core per job, which is substantially overloaded and therefore slow.

If the aim of game is, to run as fast as possible,this should be implemented.
Alternatively, there could be 2 versions.
One as is and the other as it was before (through plan classes).

EDIT: Theory jobs

I am currently doing this on my i7 Macbook Pro (4CPUs and 8 threads), just setting the new project preference options to 1 task max and 3 CPUs max. Try it!

See my post http://lhcathomedev.cern.ch/vLHCathome-dev/forum_thread.php?id=280&postid=3885#3885
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Rasputin42
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Message 3888 - Posted: 30 Jul 2016, 13:52:45 UTC - in response to Message 3887.  

Is there ANY way, i could run 3 jobs with 4 cores?


What i mean is have a vm with 3 RUNNING JOBS but 4 CORES assigned!
Not a 4 job task.

Or alternatively 3 tasks running 1 job each, but USING 4 CORES.

This used to be possible, before multi core version with 2 cores per vm, but only one job running in each VM.
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Message 3893 - Posted: 30 Jul 2016, 16:41:06 UTC

you can't control the number of jobs inside the VM?
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Profile Magic Quantum Mechanic
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Message 3897 - Posted: 30 Jul 2016, 21:37:41 UTC
Last modified: 30 Jul 2016, 21:38:56 UTC

YOW

I was just thinking about how this project was my favorite as far as how I could always depend on it to run without any problems and I could have several here waiting to run and not starting until the last one finished so it never gave other project tasks any problems.

THEN I look at this host and keep wondering why all the other Cern tasks said they were waiting to run.

Then after a closer look I see vLHC-dev 8core running and only the GPU tasks running with it.

And I see I have 7 more of those waiting.

I guess that is fine if you have a computer with nothing else to do or you some how got on here and made this your first trip to the land of Boinc.

I did see I had one at 40% but I just can't run this version myself.

I have been testing these for several months but there I would at least just get 6 of the 8 cores used.

I would have to stop running the vLHC and Atlas (or any other CPU task)

Break time I guess.
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Rasputin42
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Message 4307 - Posted: 9 Nov 2016, 17:52:05 UTC

I suggest to update the guest-additions to version 5.0+ inside the image file to better utilize the performance increase with multi-core apps announced by oracle for the 5.0+ versions.
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Message boards : Number crunching : Performance Tuning


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