BRP3 CUDA

tolafoph
tolafoph
Joined: 14 Sep 07
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@mikey RE: Cuda is

@mikey

Quote:
Cuda is another way to say GPU for Boinc projects, so unless you have 4 gpu's in that machine you should not be running 4 cuda units and 1 S5gc unit,


hotze33 has 4 GPUs 2x2

Quote:
(Q6600 with 2x9800GX2).

@hotze33

Quote:
The runtime for the BRP3 is 37000s, which seems way to long.


I got the runtime down to 6000s.
So with 500 credits per task I could get around 7000 crredits/day.

hotze33
hotze33
Joined: 10 Nov 04
Posts: 100
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@ Developers: Does the new

@ Developers: Does the new app benefit from the new gpus (fermi)?

tolafoph
tolafoph
Joined: 14 Sep 07
Posts: 122
Credit: 70,995,392
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I have similar problems on

I have similar problems on win xp 32 bit. Same hardware just other OS.

With 1 CPU + 1 GPU = 50% + 22% the GPU load is at 63%.
I get a progress rate of ~ 1.3%/min.

With 1 CPU + 1 CPU + 1 GPU = 48% + 48% + 2% and the GPU load drops under 20% and even down to 12%.
Which giveas a progress rate between 0.3%/min and 0.6%/min

ExtraTerrestrial Apes
ExtraTerrestria...
Joined: 10 Nov 04
Posts: 758
Credit: 145,486,234
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Any official comment? Is this

Any official comment? Is this problem known and/or being worked on?
Well.. it's almost Christmas. At my institute not much is going to happen for the next 3 weeks or so.. ;)

MrS

Scanning for our furry friends since Jan 2002

tolafoph
tolafoph
Joined: 14 Sep 07
Posts: 122
Credit: 70,995,392
RAC: 85,044

Hi, one more test. Only

Hi, one more test.

Only when I set the priority of the CUDA-task in the task-manager to realtime (Echtzeit) while running two CPU-tasks, it will use the 20% CPU-time and the GPU-load goes up to the normal 53% under vista64.

Bernd Machenschalk
Bernd Machenschalk
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Administrator
Joined: 15 Oct 04
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RE: This is somewhat odd.

Quote:
This is somewhat odd. To prevent this kind of performance degrading, BOINC is supposed to give the Cuda tasks a higher priority with the operating system so that for the little CPU work that needs to be done, the app is never starved.

BOINC is setting the priorities correctly, but it looks like Windows doesn't treat these priorities as expected. Under investigation...

BM

BM

Jeroen
Jeroen
Joined: 25 Nov 05
Posts: 379
Credit: 738,419,435
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My system received the first

My system received the first BRP3 WU I have seen this morning. The first one processed in 2061 seconds, which is considerably quicker than the previous generation CUDA work unit which took around 2.36 hours via the same GPU. GPU load on one GPU (580) was 35-45% and 60-65% on the other GPU (8800).

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
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Joined: 28 Aug 06
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RE: My system received the

Quote:
My system received the first BRP3 WU I have seen this morning. The first one processed in 2061 seconds, which is considerably quicker than the previous generation CUDA work unit which took around 2.36 hours via the same GPU. GPU load on one GPU (580) was 35-45% and 60-65% on the other GPU (8800).

This is the kind of performance that would be expected from previous tests performed on the new app.

I noticed you are using driver 262.99 . Is anybody experiencing the problem described here with this driver version?

CU
HBE

PDH
PDH
Joined: 20 Dec 10
Posts: 1
Credit: 6,614,533
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RE: Only when I set the

Quote:

Only when I set the priority of the CUDA-task in the task-manager to realtime while running two CPU-tasks, it will use the 20% CPU-time and the GPU-load goes up to the normal 53% under vista64.

I confirm, manual set priority to realtime helps.
I'm running 12 CPU WUs and 2 GPUs WUs simultaneously;
i7-980X, 2x460GTX, Windows XP x64, v260.99 Nvidia driver, Boinc client v6.12.8

GPUs usage without changing priorities ~5%
After set priority to RealTime, jumps to ~50%

My first BRP3 WU completed after 25000s (on GTX460)!!!
Next WU took 6000s to complete(priority changed in the middle of a task).
It should be better now. We will see.

hotze33
hotze33
Joined: 10 Nov 04
Posts: 100
Credit: 293,019,576
RAC: 0

I haven´t got any BRP3 wu

I haven´t got any BRP3 wu the last days, but if I remember correctly the priority *is* changed from the lowest level (S5GC) to the second lowest level (BRP3).

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