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Old 01-04-12, 11:18 PM   #8
Linux addict...
Join Date: Jan 2004
Posts: 540
Default Re: Excessive Xorg CPU usage while running CUDA apps

My setup is rather simple (see DEV machine in my signature).
BOINC is running in a headless (DISPLAY=) account, while I'm logged in running KDE WM.
My question is rather simple: Why am I seeing Xorg eating so much CPU? (even when kwin/KDE are idle).
Is it normal GL context operations being bogged down in some kind of busy loop, while the drivers struggles to schedule their request within the stream of BOINC processing?
I'm no GL expect (not even close), but shouldn't X requests simply sleep until the GPU can schedule them? (As opposed to spinning at 100% CPU?)

... What I'm trying to gather is: Is it a X bug? KDE? nVidia drivers?

- Gilboa
DEV-NG: Intel S2600C0, 2xE52658V2, 32GB, 4x2TB, GTX680, F19/x86_64, Dell U2711.
DEV: Intel S5520SC, 2xX5680, 36GB, 5x320GB, GTX550, F19/x86_64, Dell U2711 (^).
SRV: Tyan Tempest i5400XT, 2xE5335, 8GB, 4x2TB, 9800GTX, F19/x86-64, Dell U2412.
LAP: ASUS N56VJ, i7-3630QM, 16GB, 1TB, 635M, F19/x86_64.
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