New CPU WUs - DUDHIVPR

Message boards : News : New CPU WUs - DUDHIVPR

Author	Message
MJH Project administrator Project developer Project scientist Send message Joined: 12 Nov 07 Posts: 696 Credit: 27,266,655 RAC: 0 Level Scientific publications	Message 35848 - Posted: 24 Mar 2014 \| 10:38:10 UTC Last modified: 24 Mar 2014 \| 10:38:25 UTC
	Hi All, I've just submitted our first large batch of work units for the CPU application, named "DUDHIVPR*". The purpose of these WUs is to test the correctness of operation of our application by attempting to reproduce published benchmark data. Matt
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Jacob Klein Send message Joined: 11 Oct 08 Posts: 1127 Credit: 1,901,927,545 RAC: 0 Level Scientific publications	Message 35856 - Posted: 24 Mar 2014 \| 12:23:27 UTC - in response to Message 35848. Last modified: 24 Mar 2014 \| 12:27:11 UTC
	1) When I suspend the GPUGrid "CPU Only" tasks in BOINC, they are actually still running, according to Task Manager and Process Explorer. Surely this is a huge bug? 2) How often do these tasks checkpoint? I had several running for 20 minutes, I think, then restarted BOINC, and lost all of that work. :( Windows 8.1 Update 1 x64, BOINC 7.3.11 x64
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MJH Project administrator Project developer Project scientist Send message Joined: 12 Nov 07 Posts: 696 Credit: 27,266,655 RAC: 0 Level Scientific publications	Message 35859 - Posted: 24 Mar 2014 \| 13:52:52 UTC - in response to Message 35856.
	Hi Jacob, These particular WUs don't checkpoint - the code doesn't currently support it, and the WUs shouldn't last for more than 30mins or so. However, suspending ought to work. I'll check it out. Matt
	ID: 35859 \| Rating: 0 \| rate: / Reply Quote

Jacob Klein Send message Joined: 11 Oct 08 Posts: 1127 Credit: 1,901,927,545 RAC: 0 Level Scientific publications	Message 35860 - Posted: 24 Mar 2014 \| 14:23:43 UTC - in response to Message 35859.
	Regarding run time, I'm running several on my high-powered i7-965-XE (overclocked to 3.7 GHz).... and after a full hour, they're only 61% done. That's quite a long time to go without checkpointing.
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MJH Project administrator Project developer Project scientist Send message Joined: 12 Nov 07 Posts: 696 Credit: 27,266,655 RAC: 0 Level Scientific publications	Message 35862 - Posted: 24 Mar 2014 \| 14:43:37 UTC - in response to Message 35860.
	Regarding run time, I'm running several on my high-powered i7-965-XE (overclocked to 3.7 GHz).... and after a full hour, they're only 61% done. That's quite a long time to go without checkpointing. There's variation as the runtime depends on the complexity of the input molecualr (all WUs being different). Future WUs will be shorter, I hope. Part of the test here is to determine how long WUs have to run for before converging on reproducible results. We can't practically add checkpointing to this code, its design makes it difficult to retrofit. MJH
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Neil Polson Send message Joined: 23 Jun 13 Posts: 1 Credit: 2,017 RAC: 0 Level Scientific publications	Message 35863 - Posted: 24 Mar 2014 \| 14:50:19 UTC
	Any chance we can get more than one per core?
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MJH Project administrator Project developer Project scientist Send message Joined: 12 Nov 07 Posts: 696 Credit: 27,266,655 RAC: 0 Level Scientific publications	Message 35865 - Posted: 24 Mar 2014 \| 14:59:17 UTC - in response to Message 35863.
	Any chance we can get more than one per core? No sure what you mean. The tasks are serial (they'll use a single core) but you can have one on every CPU core you wish to allocate to the project. Matt
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Message boards : News : New CPU WUs - DUDHIVPR

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