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SETI MB CUDA for Linux
pp:
--- Quote from: koschi on 27 Jul 2009, 04:58:04 pm ---The default priority of nice 10 seems to slow the process down on my box, once I switched it to 0 or -5, it processed much faster and collected up CPU time quicker.
--- End quote ---
Is there a way to control the SETI apps' default nice level through the configuration files? The nice level is supposed to be inherited from the parent app but default on my computer, BOINC has 0, AK_V8_linux64_sse3 has 19 and setiathome-6.08.CUDA_2.2_x86_64-pc-linux-gnu has 10 so obviously there's something I don't understand here. ;D Right now I'm using an external daemon to renice the processes now and then.
sunu:
--- Quote from: pp on 06 Aug 2009, 01:28:09 pm ---BOINC has 0, AK_V8_linux64_sse3 has 19 and setiathome-6.08.CUDA_2.2_x86_64-pc-linux-gnu has 10 so obviously there's something I don't understand here. ;D Right now I'm using an external daemon to renice the processes now and then.
--- End quote ---
Renice them to what? Those priority levels are good for a system that you work on. Unless it is a dedicated cruncher.
And how your cuda client starts at 10? Mine always starts at 19 and have to lower it with a script.
pp:
Well, running two CPU instances at nice 19 and one CUDA at nice 10 on this dualcore makes the CUDA task take several hours. Renicing the CUDA task to -5, like koschi mentioned, one CUDA task completes in 23 minutes on this 9800GT. It's almost a dedicated cruncher. It's my gaming rig but I don't use it often.
koschi:
For the box where I tried this, it really made a difference. Those days I was running Docking@home on the CPU, might not be that dramatic with other CPU projects.
I use a one line command in cron, being executed once per minute, renicing all cuda processes to -5. The system is just crunching and serving files, so no issues if the interface would get a little choppy or not :)
sunu:
Back in the days when cuda needed a whole core, I was running a 3+1 config in my quad core. All processes had the lowest priority (19) and I don't think I had any serious slowdown, maybe a minute or so, not more. And this was my everyday desktop so many things were running, firefox with many many tabs, full 3d compiz effects, everyday backups, etc.
Only now that cuda shares a core with the other seti@home tasks, I started renicing them only to make them higher priority than the other seti@home instances. I think -5 is not necessary.
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