gpu stop work if cpu wu´s at high priority

Message boards : Number crunching : gpu stop work if cpu wu´s at high priority

Author	Message
tpl Send message Joined: 12 Nov 03 Posts: 284 Credit: 160,129,108 RAC: 54,482	Message 1228400 - Posted: 6 May 2012, 19:21:29 UTC
	hi, at my i7 with 2 nvidia 570 running 8 wu´s cpu and 4 wu´s at gpu....but when all cpu wu´s running at high priority the ´gpu stops crunching. don´t know why :-(
	ID: 1228400 ·

jason_gee Volunteer developer Volunteer tester Send message Joined: 24 Nov 06 Posts: 4059 Credit: 60,516,498 RAC: 57,370	Message 1228403 - Posted: 6 May 2012, 19:29:16 UTC - in response to Message 1228400. Last modified: 6 May 2012, 19:35:21 UTC
	hi, at my i7 with 2 nvidia 570 running 8 wu´s cpu and 4 wu´s at gpu....but when all cpu wu´s running at high priority the ´gpu stops crunching. don´t know why :-( The technical term is 'CPU overcommit' and is complicated. Your GPU worker threads that feed the GPU's need to be higher than the CPU tasks, or they will never get any CPU to feed them. If you are using some priority changing software, like Fred's priority tool, or Process Lasso, I would suggest to keep CPU processes at 'Below Normal', and boost GPU host processes to 'Above Normal' [Edit:]Another option is to keep 1 real or virtual core free to feed them Jason ____________ "It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change." Charles Darwin
	ID: 1228403 ·

msattler Volunteer tester Send message Joined: 9 Jul 00 Posts: 34289 Credit: 346,171,992 RAC: 554,320	Message 1228408 - Posted: 6 May 2012, 19:34:37 UTC
	I think there was also a bug in certain versions of Boinc that would stop GPU crunching if CPU work was in high priority. But I am not sure what versions it was. ____________ ****** "Ask not, what your kitty can do for you. Ask what you can do for your kitty." As it is kitten, so shall it be done.
	ID: 1228408 ·

tpl Send message Joined: 12 Nov 03 Posts: 284 Credit: 160,129,108 RAC: 54,482	Message 1228410 - Posted: 6 May 2012, 19:42:29 UTC
	thx for quick answer, i change from 7.0.23 to 7.0.25 and at the moment all running "normal" maybe a bug at bm 7.0.23
	ID: 1228410 ·

Cliff Harding Volunteer tester Send message Joined: 18 Aug 99 Posts: 616 Credit: 34,514,254 RAC: 55,349	Message 1228423 - Posted: 6 May 2012, 20:22:38 UTC - in response to Message 1228400.
	hi, at my i7 with 2 nvidia 570 running 8 wu´s cpu and 4 wu´s at gpu....but when all cpu wu´s running at high priority the ´gpu stops crunching. don´t know why :-( Regardless of which version of BOINC you are running you should leave at least one CPU core available for GPU processing. Both of my machines (i7/930 & i7/950) both have 2 physical GPU devices on board and are running 7 cores for CPU processing (90%). ____________ I don't buy computers, I build them!!
	ID: 1228423 ·

Richard Haselgrove Volunteer tester Send message Joined: 4 Jul 99 Posts: 7467 Credit: 39,782,408 RAC: 32,993	Message 1228429 - Posted: 6 May 2012, 20:33:12 UTC - in response to Message 1228403.
	The technical term is 'CPU overcommit' and is complicated. No, the technical term is 'bug' ;-) This one was fixed by changeset [25497]: client: fix typo that prevented GPU jobs from running if CPUs were filled with EDF jobs Part of the confusion is the multiple uses of the word 'priority': although I'm perfectly happy to talk about application, process, or thread priority in context, I think in the context of BOINC Manager it more commonly means the 'Earliest Deadline First' in David's checkin note.
	ID: 1228429 ·

jason_gee Volunteer developer Volunteer tester Send message Joined: 24 Nov 06 Posts: 4059 Credit: 60,516,498 RAC: 57,370	Message 1228431 - Posted: 6 May 2012, 20:36:53 UTC - in response to Message 1228429.
	The technical term is 'CPU overcommit' and is complicated. No, the technical term is 'bug' ;-) This one was fixed by changeset [25497]: client: fix typo that prevented GPU jobs from running if CPUs were filled with EDF jobs Part of the confusion is the multiple uses of the word 'priority': although I'm perfectly happy to talk about application, process, or thread priority in context, I think in the context of BOINC Manager it more commonly means the 'Earliest Deadline First' in David's checkin note. Ah, 'bugs', I read about those... ____________ "It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change." Charles Darwin
	ID: 1228431 ·

Wembley Volunteer tester Send message Joined: 16 Sep 09 Posts: 415 Credit: 879,818 RAC: 0	Message 1228439 - Posted: 6 May 2012, 21:04:38 UTC - in response to Message 1228431.
	Ah, 'bugs', I read about those... I use 'Raid' ____________ Donate with your searches and online buys: http://www.goodsearch.com/toolbar/university-of-california-setihome
	ID: 1228439 ·

Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 5059 Credit: 41,040,457 RAC: 52,505	Message 1228450 - Posted: 6 May 2012, 21:28:34 UTC - in response to Message 1228423.
	Regardless of which version of BOINC you are running you should leave at least one CPU core available for GPU processing. Both my systems use all CPU cores for crunching as well as the GPUs. No problems. Maybe running a couple of dual GPU cards would make it worth it, but for just the one GPU it's not worth leaving a CPU core unused for CPU processing. ____________ Grant Darwin NT.
	ID: 1228450 ·

Message boards : Number crunching : gpu stop work if cpu wu´s at high priority