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SETI MB CUDA for Linux
glennaxl:
just rebuild my system from using dotsch to ubuntu 10.4.1 and my seti cuda now is too slow (using only 0.5-1.x cpu - windows is about 7-12cpu) - about 1hr to complete. running gpugrid to see if my cuda setup has issues but grugrid seems to be running perfectly well. So what's the deal here? any ideas?
driver ver: 195.36
boinc: 6.10.17
seti cuda: 2.3
seti app: setiathome-6.08.CUDA_2.2_x86_64-pc-linux-gnu
seti wus: not vlar
sunu:
Do you raise the priority of the seti cuda app? Also why don't you use a newer graphics driver?
Metod, S56RKO:
I've recently replaced gfx card with (still old but slightly) better one. This one is 9800GX2, with 2 GPUs and 512 MB graphic RAM per GPU. Now I wonder the following: does SAH CUDA app really make use of all the HW available? Or would it be sensible to try to run, say, 2 CUDA tasks in parallel on same GPU in order to 'increase throughput' (similar to hyperthreading)?
I've observed that it's quite possible to run 2 Einstein@Home CUDA apps in parallel (indeed GPU is not used much there) while my efforts to do so with SAH failed miserably (I doubt it's due to lack of graphic RAM, single SAH CUDA ran just fine on my old 8600 with mere 256 MB gRAM).
Any thoughts?
sunu:
No, for pre-fermi GPUs there is no advantage in running multiple tasks per GPU, in fact usually the speed is worse.
Your card has two GPUs so you can run two tasks (1 per GPU) simultaneously.
glennaxl:
--- Quote from: sunu on 05 Oct 2010, 11:46:43 am ---Do you raise the priority of the seti cuda app? Also why don't you use a newer graphics driver?
--- End quote ---
Yah I found that was the problem - NICE is not playing nice at all ;D
Upgraded the driver and also used crunch3r cuda3 bins as the cuda2.2 doesn't have raised priority.
BTW, I have 1 rig that doesn't raised priority at system start-up (I also set a 20sec delay but doesn't work). I have to manually restart boinc so setiathome-CUDA_3.0_6.09.x86_64_vlarkill will be raised. My other rigs works perfectly fine though.
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