The DDX eating CPU isn't intrinsically bad. Did you check where perf says the CPU time is going? Could be doing copies/etc. On Mon, Aug 17, 2020 at 12:52 AM Andrew Randrianasulu <randrianasulu@xxxxxxxxx> wrote: > > I was testing Ilia's patches for ddx, and while they definitely helped for Xorg itself, > qemu still eats a lot of CPU if launched like this > > qemu-system-x86_64 -cdrom ~/Downloads/ISO/slax-English-US-7.0.8-x86_64.iso -m 1G -display sdl,gl=on -enable-kvm > > and left for few hours. > > top - 07:38:01 up 18:05, 2 users, load average: 2,00, 1,89, 1,83 > Tasks: 224 total, 3 running, 221 sleeping, 0 stopped, 0 zombie > %Cpu(s): 40,6 us, 6,1 sy, 0,3 ni, 49,2 id, 0,8 wa, 0,0 hi, 2,9 si, 0,0 st > MiB Mem : 11875,3 total, 3535,7 free, 3339,3 used, 5000,3 buff/cache > MiB Swap: 1145,0 total, 1131,2 free, 13,8 used. 4874,7 avail Mem > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 6215 guest 20 0 1455160 951768 45560 R 99,3 7,8 710:44.44 qemu-system-x86 > 12655 guest 20 0 2459848 1,5g 126708 R 59,1 12,6 217:53.21 seamonkey > 1991 root 20 0 178112 109500 28840 S 20,9 0,9 187:20.05 Xorg > 2068 guest 20 0 104932 51660 30764 S 5,6 0,4 54:08.99 ktorrent > 6031 root 20 0 0 0 0 I 2,0 0,0 0:20.24 kworker/0:3-events > 3697 guest 20 0 382432 20308 13696 S 1,7 0,2 91:38.13 xmms > 2064 guest 20 0 55868 37048 23976 S 1,3 0,3 2:38.47 konsole > 2319 guest 20 0 40160 21248 18548 S 1,3 0,2 12:36.63 gkrellm > 5853 root 20 0 0 0 0 I 0,7 0,0 0:07.21 kworker/2:2-events > > opreport after operf --pid 6215 said: > > opreport > Using /home/guest/botva/src/xf86-video-nouveau/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| %| > ------------------ > 260163 100.000 qemu-system-x86_64 > CPU_CLK_UNHALT...| > samples| %| > ------------------ > 144120 55.3960 nouveau_dri.so > 87990 33.8211 libdrm_nouveau.so.2.0.0 > 11783 4.5291 libpixman-1.so.0.38.0 > 7884 3.0304 kallsyms > 5310 2.0410 libc-2.30.so > 689 0.2648 ld-2.30.so > 519 0.1995 nouveau > 501 0.1926 qemu-system-x86_64 > 456 0.1753 ttm > 239 0.0919 kvm > 211 0.0811 kvm_amd > 81 0.0311 libpthread-2.30.so > 76 0.0292 drm > 49 0.0188 libSDL2-2.0.so.0.12.0 > 43 0.0165 libxcb.so.1.1.0 > 36 0.0138 libGL.so.1.2.0 > 31 0.0119 libX11.so.6.3.0 > 24 0.0092 snd_pcm > 23 0.0088 snd_hda_codec > 20 0.0077 libglib-2.0.so.0.5800.1 > 11 0.0042 snd_timer > 9 0.0035 libglapi.so.0.0.0 > 8 0.0031 libdrm.so.2.4.0 > 7 0.0027 snd_aloop > 7 0.0027 snd_hda_intel > 7 0.0027 libxshmfence.so.1.0.0 > 7 0.0027 libgcc_s.so.1 > 5 0.0019 [vdso] (tgid:6215 range:0xf7f9f000-0xf7f9ffff) > 5 0.0019 snd_hda_core > 4 0.0015 r8169 > 3 0.0012 libahci > 2 7.7e-04 ohci_hcd > 2 7.7e-04 libxcb-present.so.0.0.0 > 1 3.8e-04 libatomic.so.1.1.0 > > so, may be similar fix needed for mesa, too? > > ow, I started it in ddx src directory :} need to cleanup there. But at least data is 100 > > _______________________________________________ > Nouveau mailing list > Nouveau@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/nouveau _______________________________________________ Nouveau mailing list Nouveau@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/nouveau
