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World Community Grid Forums
Category: Support
Forum: GPU Support Forum
Thread: Working GPU crunching times |
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Thread Status: Active Total posts in this thread: 49
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Bugg
Senior Cruncher USA Joined: Nov 19, 2006 Post Count: 271 Status: Offline Project Badges: 
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skgiven, which line are we looking at to see how much time our GPU actually spent on the work unit, then? Is it the "total kernel time"?
----------------------------------------Also, I just got another gpu unit: Total time = 400 seconds, Total kernel time: 197.169022, CPU time used = 47.377504. For this one I did NOT have a cpu core available to help out. So this is a good contrast with my post above, as the previous one had a free cpu core to help. EDIT: BETA_ X0000130861029201112120930_ 1-- Doug-PC Pending Validation 3/16/12 19:31:27 3/16/12 19:38:32 0.01 193.6 / 0.0  i5-12600K (3.7GHz), 32GB DDR5, Win11 64bit Home [Edit 1 times, last edit by Bugg at Mar 16, 2012 7:50:32 PM] |
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sk..
Master Cruncher http://s17.rimg.info/ccb5d62bd3e856cc0d1df9b0ee2f7f6a.gif Joined: Mar 22, 2007 Post Count: 2324 Status: Offline Project Badges: 
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Yeah, if I'm right the "total kernel time" just means GPU runtime, Memory Transfer Time is the time to load/unload the task onto the GPU, CPU time is just that and the elapsed time is the 'total time' for the entire WU, 684 seconds for my Wingman,
BETA_X0000130860196201112120941_X0000130860196201112120941.jp2: 684 seconds I noticed that when freeing a CPU thread, the initial CPU portion of the task uses a full CPU, as expected. So I would expect freeing a core/thread helps, but the CPU time might vary, so you would need to run several with and without a free core/thread to see how much difference it makes. It might also be beneficial to free more than one thread. |
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges: 
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Wondering if you set max thread to 7 out of 8 threads in your settings, if when the GPU wu switches over to CPU if it uses that 8th thread or does it pause a thread already in use to maintain 7 threads as specified in your settings. Anyone know? Might be helpful to know this so folks can adjust properly.
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Crunching for humanity since 2007!
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sk..
Master Cruncher http://s17.rimg.info/ccb5d62bd3e856cc0d1df9b0ee2f7f6a.gif Joined: Mar 22, 2007 Post Count: 2324 Status: Offline Project Badges:
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I think so (as with other projects); I set Boinc to use 7 of 8 threads, and CPU usage went up to 100% (all threads), but I only looked at one task, and they do whiz past!
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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Think your correct as I watched I bit and didn't see any wu paused to accommodate the GPU wu. Wanted someone to verify in case I didn't catch it. Thanks skgiven.
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Crunching for humanity since 2007!
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Bugg
Senior Cruncher USA Joined: Nov 19, 2006 Post Count: 271 Status: Offline Project Badges:
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Wondering if you set max thread to 7 out of 8 threads in your settings, if when the GPU wu switches over to CPU if it uses that 8th thread or does it pause a thread already in use to maintain 7 threads as specified in your settings. Anyone know? Might be helpful to know this so folks can adjust properly. I saw my first one do the work, and it used the one that wasn't being used. EDIT: Also on my second one, I was using all my cores already, and it didn't pause any of the work units those were doing, either. It just seemed to take enough cpu time to get done what it needed to. I wasn't watching it til the last 20 seconds or so, though. i5-12600K (3.7GHz), 32GB DDR5, Win11 64bit Home [Edit 1 times, last edit by Bugg at Mar 16, 2012 9:19:37 PM] |
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ca05065
Senior Cruncher Joined: Dec 4, 2007 Post Count: 328 Status: Offline Project Badges: 
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I watched several beta GPU work units with Process Explorer and GPU-Z.
In windows 'normal' processes run with a priority of 8; Boinc CPU work units with a priority of 4 and the CPU portion of GPU work units with a priority of 6. This means that that the GPU tasks will run in preference to normal work units but after normal processes. The work unit used a full CPU core for 20 seconds with no GPU processing. While the GPU ran 40 to 60% load, the CPU used 2 or 3% of a core. Finally the work unit used a full CPU core for 60 seconds with no GPU processing. Hardware i7 2600k 8 threads; Radeon HD 6770. |
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ryan222h
Senior Cruncher Joined: Sep 4, 2006 Post Count: 425 Status: Offline |
Seems like the ATI's are generally faster than Nvidia on this beta test.
----------------------------------------Anyone out there with an ATI HD 7*** series card card? I'm curious how these compare to the older generations  |
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X-Files 27
Senior Cruncher Canada Joined: May 21, 2007 Post Count: 391 Status: Offline Project Badges:
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Nvidia GTX 570 @1620 MHz
----------------------------------------175 seconds, Total kernel time: 83.616562 , CPU time used = 164.393854 Nvidia GTX 480 @1401 MHz 188 seconds, Total kernel time: 95.299789 , CPU time used = 179.510351 Nvidia GTX 460 @1440 MHz 320 seconds, Total kernel time: 255.617493, CPU time used = 310.629191   |
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kashie
Cruncher Joined: Mar 7, 2007 Post Count: 46 Status: Offline Project Badges: 
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Seems like the ATI's are generally faster than Nvidia on this beta test. Anyone out there with an ATI HD 7*** series card card? I'm curious how these compare to the older generations AMD Tahiti is HD 79xx, see second post in this thread for my wingman's times. |
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