I observed this bug for quite some time, but so far I workarounded it
with just setting DRI2 (default) in xorg.conf.d/20-nouveau.conf
Now with two GPU i iwsh to use DRI3, so right now it set up like this:
cat /etc/X11/xorg.conf.d/20-nouveau.conf
Section "Device"
Identifier "Card0"
Driver "nouveau"
Option "PageFlip" "1"
#Option "AccelMethod" "glamor"
Option "DRI" "3"
But just after two hours of uptime X already eating some CPU:
op - 01:30:49 up 2:45, 1 user, load average: 1,12, 0,93, 0,84
Tasks: 210 total, 1 running, 209 sleeping, 0 stopped, 0 zombie
%Cpu(s): 12,1 us, 3,9 sy, 0,0 ni, 81,7 id, 0,7 wa, 0,0 hi, 1,6 si, 0,0 st
MiB Mem : 11875,3 total, 6416,4 free, 1634,8 used, 3824,1 buff/cache
MiB Swap: 1145,0 total, 1145,0 free, 0,0 used. 9969,7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1198 root 20 0 146160 78828 28160 S 35,8 0,6 30:41.37 Xorg
1285 guest 20 0 59776 17332 13756 S 11,6 0,1 16:12.83 xmms
4006 guest 20 0 1743952 919312 120628 S 10,9 7,6 20:51.01 seamonkey
1278 guest 20 0 101508 48528 30496 S 3,0 0,4 4:03.21 ktorrent
1274 guest 20 0 43368 31784 23684 S 2,0 0,3 0:29.43 konsole
1259 guest 20 0 43092 28232 23640 S 1,3 0,2 0:21.53 kicker
1255 guest 20 0 6560 4160 2720 S 1,0 0,0 1:00.90 kompmgr
1293 guest 20 0 40164 21328 18636 S 1,0 0,2 1:30.50 gkrellm
1254 guest 20 0 31616 21832 18944 S 0,7 0,2 0:06.49 kwin
in ~1 day it will eat full core from my AMD FX-4300 and X will become sluggish ...
I tried to trace it with operf 1.2.0:
operf --pid 1198
operf: Press Ctl-c or 'kill -SIGINT 7787' to stop profiling
operf: Profiler started
^C
Profiling done.
root@slax:~# opreport
Using /root/oprofile_data/samples/ for samples directory.
CPU: AMD64 family15h, speed 3800 MHz (estimated)
Counted CPU_CLK_UNHALTED events (CPU Clocks not Halted) with a unit mask of 0x00 (No unit mask) count 100000
CPU_CLK_UNHALT...|
samples| %|
------------------
78166 100.000 Xorg
CPU_CLK_UNHALT...|
samples| %|
------------------
62905 80.4762 nouveau_drv.so
5648 7.2256 kallsyms
4186 5.3553 Xorg
1419 1.8154 libpixman-1.so.0.38.0
1038 1.3279 nouveau
687 0.8789 libc-2.30.so
632 0.8085 libexa.so
510 0.6525 libdrm_nouveau.so.2.0.0
402 0.5143 libfb.so
259 0.3313 drm
230 0.2942 ttm
108 0.1382 libpthread-2.30.so
47 0.0601 libdrm.so.2.4.0
34 0.0435 [vdso] (tgid:1198 range:0xf7fbf000-0xf7fbffff)
27 0.0345 evdev_drv.so
7 0.0090 snd_hda_codec
5 0.0064 r8169
5 0.0064 snd_pcm
5 0.0064 libXfont2.so.2.0.0
3 0.0038 snd_aloop
3 0.0038 libglx.so
2 0.0026 kvm
2 0.0026 snd_timer
1 0.0013 snd_hda_core
1 0.0013 snd_hda_intel
so, nouveau_drv itself is major CPU eater ....
I'll try to rebuild it with debug symbols enabled, and hopefully it will be enough
for at least seeing who eats all those cycles ....
Sorry for so many emails, just i keep discovering new bugs as I try new things!
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