Ineffective GPU usage in radio pulsar search

lelik
lelik
Joined: 15 Dec 10
Posts: 1
Credit: 403813
RAC: 0
Topic 195535

Task use only 3% of GPU.
I have Nvidia gtx 470 card.
One task takes 10 hours

dunx
dunx
Joined: 13 Aug 10
Posts: 119
Credit: 53470527
RAC: 0

Ineffective GPU usage in radio pulsar search

Caused by the task priority being set by BOINC as "idle"... I'm using W7.

I use Process Lasso to set it to real-time, and my GTX 460 now takes 50 minutes to complete each BRP WU.

HTH

dunx

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3522
Credit: 770660469
RAC: 1157099

RE: Task use only 3% of

Quote:
Task use only 3% of GPU.
I have Nvidia gtx 470 card.
One task takes 10 hours

The problem is under investigation and is related to task or thread priority. See this thread for a discussion of the issue :
http://einsteinathome.org/node/195515

HBE

Ascholten
Ascholten
Joined: 20 Oct 10
Posts: 63
Credit: 2848108
RAC: 0

It's a pain in the butt, they

It's a pain in the butt, they are working on it, but Task manager, you can select the specific app being worked on and set the priority to 'real time' to work it, and it will drop from the 10 hours to about an hour to get the task done.

Unfortunately, once that specific task is done, it reverts back to normal and the next one you get assigned you will have to 're bump' it to hi priority to get it running good again.

Another Issue I feel I should mention, if you are pushing your vid card, at times when it lets go of a finished task, the card can revert to a very low setting, as in below default, and you might have to reboot to get it to get back to where you need it to.

This is NOT a guaranty to happen, It has happened to me a few times with my GTX570, not a big deal but possible to happen. Honestly I will say it happens maybe 2 or 3 times out of a dozen tasks, so is not a constant problem.

They are aware of the issue from what I am told and are working on trying to fix it.

As a final note, if you leave your card where it defaults to, and let it run, it will take a bit longer but won't tweak out on you and still do fairly decent on tasks, when it hands off the einstein gpu task to whatever the next task is, from what I have seen on my machine, it won't downgrade.

HOpe this helps.
Aaron

If god meant for us not to BOINC he'd have made our #$%^%^ shorter!!

dunx
dunx
Joined: 13 Aug 10
Posts: 119
Credit: 53470527
RAC: 0

RE: Caused by the task

Quote:

Caused by the task priority being set by BOINC as "idle"... I'm using W7.

I use Process Lasso to set it to real-time, and my GTX 460 now takes 50 minutes to complete each BRP WU.

HTH

dunx

Process Lasso allows ALL BRP threads to be assigned a default priority of "real-time", so no maintenance work needed.

There's little point in speeding up your GPU as a GTS 430 is almost as quick as a GTX 460, so avoid the aggravation of it slowing down.

Currently have 160 WU pending ! !

dunx

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.