Advanced search

Message boards : Number crunching : Best duration of workunits

Post to thread Subscribe Sort
Author Message
Profile GDF
Volunteer moderator
Project administrator
Project developer
Project tester
Volunteer developer
Volunteer tester
Project scientist
Send message
Joined: 14 Mar 07
Posts: 1957
Credit: 629,356
RAC: 0
Level
Gly
Scientific publications
watwatwatwatwat
Message 1248 - Posted: 17 Jul 2008 | 17:22:58 UTC
Last modified: 17 Jul 2008 | 17:23:20 UTC

What would it be the best duration for workunits?
Keep in mind that the longer they run the better is for us...

GDF

ID: 1248 | Rating: 0 | rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Krunchin-Keith [USA]
Avatar
Send message
Joined: 17 May 07
Posts: 512
Credit: 111,288,061
RAC: 0
Level
Cys
Scientific publications
watwatwatwatwatwatwatwatwatwatwatwatwatwatwat
Message 1251 - Posted: 17 Jul 2008 | 18:03:58 UTC - in response to Message 1248.

What would it be the best duration for workunits?
Keep in mind that the longer they run the better is for us...

GDF

What is best for the project, 24 hours, same as PS3 tasks ?

Since I'm not actually running any GPU work (I'm on Windows) its hard to test. My thinking is 24 hours, Users can set thier resource share in BOINC to slow down so it switches between projects and takes time over 3 days or whatever so as not to be running the GPU at full power all the time, BOINC would finish within the deadline on time if necessary. As long as the deadline is not too short.

ID: 1251 | Rating: 0 | rate: Rate + / Rate - Report as offensive    Reply Quote
Profile [XTBA>XTC] ZeuZ
Send message
Joined: 15 Jul 08
Posts: 60
Credit: 108,384
RAC: 0
Level

Scientific publications
wat
Message 1252 - Posted: 17 Jul 2008 | 18:13:44 UTC

I think it's not important for us if the checkpoints are sure, IMO

I've just one question, are there actualy different unit duration? I calculated two work unit but the time of calculation was different, the gpu was the same, the frequency too

Thanks

ZeuZ @ L'Alliance Francophone

ID: 1252 | Rating: 0 | rate: Rate + / Rate - Report as offensive    Reply Quote
Profile GDF
Volunteer moderator
Project administrator
Project developer
Project tester
Volunteer developer
Volunteer tester
Project scientist
Send message
Joined: 14 Mar 07
Posts: 1957
Credit: 629,356
RAC: 0
Level
Gly
Scientific publications
watwatwatwatwat
Message 1253 - Posted: 17 Jul 2008 | 18:16:08 UTC - in response to Message 1252.

I think it's not important for us if the checkpoints are sure, IMO

I've just one question, are there actualy different unit duration? I calculated two work unit but the time of calculation was different, the gpu was the same, the frequency too

Thanks

ZeuZ @ L'Alliance Francophone


Current GPU wu should last more or less the same time.
The time might depend on if you have used the graphics card in the meanwhile.

GDF

ID: 1253 | Rating: 0 | rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Stefan Ledwina
Avatar
Send message
Joined: 16 Jul 07
Posts: 464
Credit: 218,307,857
RAC: 4,221,504
Level
Leu
Scientific publications
watwatwatwatwatwatwatwat
Message 1256 - Posted: 17 Jul 2008 | 20:25:17 UTC

I actually like the relative short runtimes of 9-12 hours depending on the cards I have, but if it is better for the project, I would also be ok about 24 hours or longer tasks if needed...
As long as the checkpointing works. But as far as I can tell it does work, so I have no problem with longer tasks!

@Keith
Actually BOINC works a little bit different with GPU tasks and resource share... When I have GPU tasks running, they actually don't switch to other tasks depending on resource share, and switch time, like CPU tasks... They do start and run until completion. Don't know if this is by design, or a bug in BOINC?
____________

pixelicious.at - my little photoblog

ID: 1256 | Rating: 0 | rate: Rate + / Rate - Report as offensive    Reply Quote
Post to thread

Message boards : Number crunching : Best duration of workunits

//