Message boards : Number crunching : Increase queued work units
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Todd1561

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Message 4984 - Posted: 9 Dec 2021, 19:23:48 UTC
Last modified: 9 Dec 2021, 19:24:27 UTC

Is there a way to increase the number of tasks I can keep in my queue? I'd like to keep a few days worth so if there's an outage with the project servers I can keep crunching until they get it sorted out. Currently, with my 16 thread CPU it'll only let me keep about 350 tasks waiting, which I can complete in about 15 hours. I've adjusted
work_buf_min_days 
and
work_buf_additional_days 
but I just get a "This computer has reached a limit on tasks in progress" message from the server. The only way I've been able to pull more is by artificially boosting my
ncpus 
count but that has unintended consequences I don't like.
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Message 4985 - Posted: 9 Dec 2021, 22:42:07 UTC

Not with 1 client
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Profile Keith Myers
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Message 4987 - Posted: 9 Dec 2021, 23:22:25 UTC

The project limit is 24 tasks per thread. So your theoretical maximum is 384 tasks per day without the ncpu kludge.
You can look at this post which summarizes the limit. https://universeathome.pl/universe/forum_thread.php?id=606&postid=4968
The project only recognizes a maximum of 64 threads per host even with the ncpus parameter involved.

A proud member of the OFA (Old Farts Association)
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Todd1561

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Message 4988 - Posted: 10 Dec 2021, 13:03:32 UTC

Ok thanks. That seems to match what I’m seeing. Do you think there’s any interest on the project maintainers side to increase that number? I’m assuming it was formulated years ago before the high core/thread count CPUs we have today. If so is this the place to request it?
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Profile Krzysztof Piszczek - wspieram ...
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Message 4989 - Posted: 10 Dec 2021, 14:49:05 UTC - in response to Message 4988.  

I will check and possibly increase the limit over this weekend :)
Krzysztof 'krzyszp' Piszczek

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Message 4990 - Posted: 10 Dec 2021, 14:51:33 UTC - in response to Message 4989.  

Hey that's great, thanks!
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Message 4991 - Posted: 10 Dec 2021, 17:52:59 UTC - in response to Message 4990.  

Limits changed, please confirm if it is enough.
Krzysztof 'krzyszp' Piszczek

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Todd1561

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Message 4992 - Posted: 10 Dec 2021, 22:10:03 UTC
Last modified: 10 Dec 2021, 22:10:48 UTC

Thanks, looks like it bumped to 35 queued tasks per thread? Is that right? That helps but ideally I'd like to keep say 3 days worth in queue. That would be about 72 tasks per thread on my hardware.
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Message 4993 - Posted: 11 Dec 2021, 1:01:01 UTC

Set another project with zero priority if you're worried about running out of work. No one needs 3 days. If you run out of work with 1.5 days then so will everyone else.
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Todd1561

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Message 4994 - Posted: 11 Dec 2021, 1:40:27 UTC

It’s not about processors running idle, I already have a couple 0 weight backup projects. Nor is it about maintaining rank among the project participants. It’s about driving all my resources towards the project I’d like to support most. It’s in the best interest of the project, too. Because during an extended outage we could all keep working on Universe tasks rather than shift to a backup project.

Anyway, not looking to make a big thing about it. Just figured I’d pose the question. Thanks to Krzysztof for upping the limit!

Have a nice weekend everyone.
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Message 4995 - Posted: 12 Dec 2021, 18:35:39 UTC

Then run more clients.
Many projects have a lot lower task count per core even before U@H's change, esp for GPUs. Some have limits that only allow for 1-2 hours of work.
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Message boards : Number crunching : Increase queued work units




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