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World Community Grid Forums
Category: Support
Forum: GPU Support Forum
Thread: intermittent pauses |
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Thread Status: Active Total posts in this thread: 31
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Oliver Scheffer
Cruncher Joined: May 24, 2012 Post Count: 3 Status: Offline Project Badges: 
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Hello!
At every WU I've noticed GPU computing pausing for about 20 seconds each at 49,707%, 50,000% and 99,707%. Thus it takes over 3 minutes to finish a WU instead of 2 minutes. ATI Radeon 7850, Ivy Bridge, latest drivers, x64 version of BOINC (although I only get x32 WU) Did anyone encounter a similar behaviour? Bye, Oliver |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
This is "standard" behavior for HCC, both CPU and GPU, the same as there always has been, but previously when there was only one image in the task only at 99.818%. Now there are two images, so there is the "completion" pause in the middle and at end now. But, what you're saying is, where before on 1 image tasks it took 2 minutes, with 2 images it is taking 3 minutes, that's 100% more work in half the additional time... pretty good. :D
----------------------------------------[Edit 1 times, last edit by Former Member at Dec 19, 2012 4:34:30 PM] |
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nanoprobe
Master Cruncher Classified Joined: Aug 29, 2008 Post Count: 2998 Status: Offline Project Badges: 
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Hello! At every WU I've noticed GPU computing pausing for about 20 seconds each at 49,707%, 50,000% and 99,707%. Thus it takes over 3 minutes to finish a WU instead of 2 minutes. ATI Radeon 7850, Ivy Bridge, latest drivers, x64 version of BOINC (although I only get x32 WU) Did anyone encounter a similar behaviour? Bye, Oliver That is how the app works. There is a CPU and and GPU part. There will be a pasuse at startup and another pause at all the times you noted. That is when the CPU is doing its' part of the calculations. Perfectly normal.
In 1969 I took an oath to defend and protect the U S Constitution against all enemies, both foreign and Domestic. There was no expiration date.
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Oliver Scheffer
Cruncher Joined: May 24, 2012 Post Count: 3 Status: Offline Project Badges:
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I see, thanks for the quick reply!
Didn't notice the pause at startup, but justed checked it with the task manager, these are indeed "CPU times". Just for reference: A pure CPU WU takes about 80 minutes. Bye, Oliver |
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges: 
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WoW !! 80 minutes.
----------------------------------------That is less than one and half hours. Using a 4.2 GHz 980X under Win7 I do 2 hours or 120 minutes in average. If you are under Linux it is indeed faster than Win7 by 15-20%. I wonder what kind of CPU do you use and at what frequency.  |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
FAIK, there's opposed to Windows a 64 bit app of HCC for Linux, and Linux. Same as with VINA, the 64 bit run 60-70% faster than the 64 bit on Windows, which on fractionally runs faster than the 32 bit on Windows, or say it differently, 64 bit on Linux gains a lot over 32 bit, when on Windows 4-8%. My old dongle Q6600 needs an average of 2.7 hours but that's at 2.4Ghz under, Ubu-64.
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Oliver Scheffer
Cruncher Joined: May 24, 2012 Post Count: 3 Status: Offline Project Badges:
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I wonder what kind of CPU do you use and at what frequency. I'm using an Intel Ivy Bridge 3570K at 4.2 GHz. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I have same problems with pause. IP7(960)-3.6 OC Ghz+7970 do one task (hel conc cancer ati) at 4 min. 18sec. and have this long pauses.
IP5(2500K) - 4 OC ghz+7970 = 2m. 14s. have fast pauses IP5(2320) - 3.5 OC ghz+7970 = 2m. 40s. have fast pauses WTF? |
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branjo
Master Cruncher Slovakia Joined: Jun 29, 2012 Post Count: 1892 Status: Offline Project Badges:
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Grigory, have you read whole thread? It is not a problem, it is how HCC ATI application works.
----------------------------------------4m18s looks quite long for 7970 + 960, but as you have not stated any further info about your comps... Cheers.  Crunching@Home since January 13 2000. Shrubbing@Home since January 5 2006  |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I read it, and not find any answer.
----------------------------------------IP7-960(OC to 3.6Ghz) 24Gb ram Running on 1800Mhz/Gigabyte X58A-UD3R/MSI 7970 Lighting -Running 8 tasks 1 CPU+GPU + 7CPU IP5 2500K (OC to 4ghz) 32Gb ram running on 1600 mhz/Gigabyte Z68XP-UD3/Gigabyte 7970 - Runing 4 tasks 1cpu+gpu + 3 cpu IP5 2320K (OC to 3.5ghz) 16Gb ram running on 1600 mhz/Gigabyte Z68XP-UD3/Gigabyte 7970 - Runing 4 tasks 1cpu+gpu + 3 cpu [Edit 2 times, last edit by Former Member at Dec 20, 2012 9:04:40 AM] |
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