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World Community Grid Forums
Category: Support
Forum: GPU Support Forum
Thread: HCC GPU Tasks Locking up my system |
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Thread Status: Active Total posts in this thread: 7
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I just had to abort a huge amount of HCC GPU tasks, because whie I the PC is meant for crunching so I did not care about the laggy performance with graphics and what not, what was really frustrating me is when running those tasks every 15-30 seconds all the tasks would freeze up reporting that CPU is busy, and it stays that way for over a minute. I checked there were no other tasks running in the background, this was not a heat/ throttling issue, it seemed it only had to do with the GPU tasks.
System specs: intel i5 quad core processor, Nvidia GT 640 GPU (2GB DDR3) 8GB RAM Ubuntu 12.04 I really didn't want to do this but it was completely killing mysystem, looking at whats been accomplished it looks like its only completed a small fraction of the tasks it should have completed in that time frame. Please Advise. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi Adam,
----------------------------------------Going to give you the quick fix. 1) In Local preferences on the Processor tab deselect/untick "Use GPU while computer is in use." 2) In same Processor tab, in "Only after computer has been idle for xx minutes" enter 5.0 minutes. 3) On the Activity menu in the GPU section, selected GPU computing based on preferences. This should stop freezes or laggy mouse / display updating while at the computer. Long story short, NVidia cards [many] are not very good at OpenCL program execution, that what the HCC-GPU science app is coded in. This is regardless of them having 2GB DDR3 memory and the GPU task only uses a small portion of that. edit: The instructions assume that your BOINC Manager is in advanced view GUI mode. [Edit 1 times, last edit by Former Member at Jan 20, 2013 5:47:03 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Thank you SekeRob, but I think you were addressing the lag which wasn't my main concern.
What I was most concerned with is while the GPU tasks were running on this system, it would freeze up boinc completely, by halting all projects for well over a minute at a time, having everything report as "CPU is busy." Then when it would resume it would only run for a few seconds, to maybe a minute before locking up again. No non-essential task was runnning besides boinc, when this was happening. It had somethign to do with the GPU tasks and how they worked between my CPU and GPU. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Thought to kill 2 birds with one stone. It was/is not clear to me if the observation was also outside of user time. What I know is when loading Ubuntu's System Monitor app [to monitor processes], that program itself causes huge lag, so eventually had to set BOINC to stop computing when the CPU load was over 35% and sadly that unloads the GPU tasks, LAIM only working for CPU tasks. SM I no-longer use. Got something from KDE that does not cause this, but that as an aside.
----------------------------------------edit: For sure, freezing a minute kills BOINC jobs or earns heartbeat misses and eventually helps jobs dying. With the said 35% setting I've got none of that, but if the freezing is BOINC GPU tasks doing this [how many are you running concurrent?], then that setting will not work... it's explicitly for non-BOINC CPU loads. If that's the case, little option you have but to end HCC-GPU crunching :( [Edit 1 times, last edit by Former Member at Jan 20, 2013 6:51:21 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
That computer has crunched both GPU Grid and Einstein GPU tasks with no problems. For HCC I am only running 1 task at a time. Oddly I have another system that can run them no problem that one also being Ubuntu, though that has a Core 2 Duo processor, and a GT 440 OEM GPU.
I will try altering the CPU load setting, as that could be the big difference, as the other PC I know I bumped up a lot of the recommended settings as it was designed to purely be a Boinc Machine. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I did that and it solved the Issue! Thank you very much.
Adam. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Good. Please let us know what % does the trick. I first went back to 25% as default, then incremented in steps of 2% per day and watched where the sweet-point was. At 37% they started sporadically appearing, at 35% none at all.
FTM I've marked my post with [RESOLVED] in the title. If you do same, when satisfied, to the opening post title [use edit button], readers will know there's a solution/workaround in the thread. |
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