Why I get different tasks for SSE2 and for AVX platform ?
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Message boards : Number crunching : Why I get different tasks for SSE2 and for AVX platform ?

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Technologov
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Message 2501 - Posted: 3 Feb 2022, 0:43:11 UTC

https://www.dropbox.com/s/gx3j3brt3gi6oqd/TN-Grid_AVX.png?dl=0

Here I see some tasks based on SSE, others on AVX. Why this is so ?

My processors are all new ("Haswell" or newer), support SSE4.x, AVX2, and FMA.

Bryn Mawr
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Message 2502 - Posted: 3 Feb 2022, 5:37:00 UTC - in response to Message 2501.

https://www.dropbox.com/s/gx3j3brt3gi6oqd/TN-Grid_AVX.png?dl=0

Here I see some tasks based on SSE, others on AVX. Why this is so ?

My processors are all new ("Haswell" or newer), support SSE4.x, AVX2, and FMA.


When you first join the server will send you a mix of tasks using different optimisations and work out which is the quickest for each machine. It will then send you that type of task exclusively.

I understand that it will recheck occasionally but I’ve never noticed it doing so on my machines.

Profile Buro87 [Lombardia]
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Message 2504 - Posted: 3 Feb 2022, 10:16:51 UTC - in response to Message 2502.
Last modified: 3 Feb 2022, 10:19:45 UTC

I understand that it will recheck occasionally but I’ve never noticed it doing so on my machines.



You can see your current performanche here http://gene.disi.unitn.it/test/show_host_detail.php?hostid=62240
click near by "Application details" it will show this page http://gene.disi.unitn.it/test/host_app_versions.php?hostid=62240

as you can see, FMA is currently faster on your pc

Technologov
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Message 2505 - Posted: 3 Feb 2022, 15:30:40 UTC - in response to Message 2504.

I suggest to download ALL 3 binaries, and a mini-benchmark (mini workload for a few minutes of your actual application). Then use whatever binary that delivers the best results.

Profile Buro87 [Lombardia]
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Message 2506 - Posted: 3 Feb 2022, 21:44:25 UTC - in response to Message 2505.

I suggest to download ALL 3 binaries, and a mini-benchmark (mini workload for a few minutes of your actual application). Then use whatever binary that delivers the best results.



Don't worry. after somme wu completed and validated, the server select automatically the best version

Bryn Mawr
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Message 2508 - Posted: 4 Feb 2022, 3:25:39 UTC - in response to Message 2504.

I understand that it will recheck occasionally but I’ve never noticed it doing so on my machines.



You can see your current performanche here http://gene.disi.unitn.it/test/show_host_detail.php?hostid=62240
click near by "Application details" it will show this page http://gene.disi.unitn.it/test/host_app_versions.php?hostid=62240

as you can see, FMA is currently faster on your pc


Yes, and avx on my other machine with a near identical spec :-

http://gene.disi.unitn.it/test/host_app_versions.php?hostid=60043 :-)

Aurum
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Message 2525 - Posted: 15 Feb 2022, 13:49:27 UTC
Last modified: 15 Feb 2022, 13:50:29 UTC

This is the way I restrict all WUs to FMA:
http://gene.disi.unitn.it/test/forum_thread.php?id=304&postid=2209#2209
You need to save a copy of the FMA executable that you can copy to all your computers:
/var/lib/boinc-client/projects/gene.disi.unitn.it_test/gene_pcim_v1.10_linux64__fma
Beware that when you install this and then click "Read config files" BOINC will wipe out all your WUs in the TN-Grid project folder so you might as well Abort them first.
Also, if you're new to BOINC you may benefit from a couple of tweaks to your cc_config.xml file.
I also recommend using BoincTasks to manage so many computers.

Bryn Mawr
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Message 2527 - Posted: 15 Feb 2022, 16:33:07 UTC - in response to Message 2525.

This is the way I restrict all WUs to FMA:
http://gene.disi.unitn.it/test/forum_thread.php?id=304&postid=2209#2209
You need to save a copy of the FMA executable that you can copy to all your computers:
/var/lib/boinc-client/projects/gene.disi.unitn.it_test/gene_pcim_v1.10_linux64__fma
Beware that when you install this and then click "Read config files" BOINC will wipe out all your WUs in the TN-Grid project folder so you might as well Abort them first.
Also, if you're new to BOINC you may benefit from a couple of tweaks to your cc_config.xml file.
I also recommend using BoincTasks to manage so many computers.


Why restrict it? Easier to let the system choose the fastest and you’ll get more work done.

Aurum
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Message 2529 - Posted: 16 Feb 2022, 15:40:25 UTC - in response to Message 2527.
Last modified: 16 Feb 2022, 15:40:40 UTC

Why restrict it? Easier to let the system choose the fastest and you’ll get more work done.

Right you are, just my idiosyncrasy.

Bryn Mawr
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Message 2530 - Posted: 16 Feb 2022, 16:10:30 UTC - in response to Message 2529.

Why restrict it? Easier to let the system choose the fastest and you’ll get more work done.

Right you are, just my idiosyncrasy.


Fair enough, we all have our own ways :-)


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Message boards : Number crunching : Why I get different tasks for SSE2 and for AVX platform ?


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