Andrew Randrianasulu
2020-Aug-17 13:44 UTC
[Nouveau] qemu -display sdl,gl=on also eats CPU
I rebuild mesa with debug symbols, and now top functions using CPU looks like this: 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 samples % image name symbol name ------------------------------------------------------------------------------- 222978 45.1489 nouveau_dri.so nv50_bufctx_fence 222978 100.000 nouveau_dri.so nv50_bufctx_fence [self] ------------------------------------------------------------------------------- 150576 30.4889 libdrm_nouveau.so.2.0.0 /usr/X11R7/lib/libdrm_nouveau.so.2.0.0 150576 100.000 libdrm_nouveau.so.2.0.0 /usr/X11R7/lib/libdrm_nouveau.so.2.0.0 [self] ------------------------------------------------------------------------------- 39524 8.0029 libpixman-1.so.0.38.0 /usr/X11R7/lib/libpixman-1.so.0.38.0 39524 100.000 libpixman-1.so.0.38.0 /usr/X11R7/lib/libpixman-1.so.0.38.0 [self] ------------------------------------------------------------------------------- 28094 5.6885 libc-2.30.so memcpy 28094 100.000 libc-2.30.so memcpy [self] ------------------------------------------------------------------------------- 13758 2.7857 kallsyms dma_direct_alloc_pages 13758 100.000 kallsyms dma_direct_alloc_pages [self] ------------------------------------------------------------------------------- 2508 0.5078 qemu-system-x86_64 /usr/bin/qemu-system-x86_64 2508 100.000 qemu-system-x86_64 /usr/bin/qemu-system-x86_64 [self] ------------------------------------------------------------------------------- 1953 0.3954 ttm /ttm 1953 100.000 ttm /ttm [self] ------------------------------------------------------------------------------- 1661 0.3363 nouveau /nouveau 1661 100.000 nouveau /nouveau [self] ------------------------------------------------------------------------------- 1462 0.2960 kallsyms find_next_iomem_res 1462 100.000 kallsyms find_next_iomem_res [self] ------------------------------------------------------------------------------- 1355 0.2744 kvm_amd /kvm_amd 1355 100.000 kvm_amd /kvm_amd [self] ------------------------------------------------------------------------------- 1273 0.2578 kvm /kvm 1273 100.000 kvm /kvm [self] ------------------------------------------------------------------------------- 1208 0.2446 ld-2.30.so _dl_update_slotinfo 1208 100.000 ld-2.30.so _dl_update_slotinfo [self] ------------------------------------------------------------------------------- 1126 0.2280 kallsyms atomic_try_cmpxchg 1126 100.000 kallsyms atomic_try_cmpxchg [self] ------------------------------------------------------------------------------- 992 0.2009 libc-2.30.so cfree at GLIBC_2.0 992 100.000 libc-2.30.so cfree at GLIBC_2.0 [self] ------------------------------------------------------------------------------- 833 0.1687 libc-2.30.so malloc 833 100.000 libc-2.30.so malloc [self] ------------------------------------------------------------------------------- 810 0.1640 libc-2.30.so _int_free 810 100.000 libc-2.30.so _int_free [self] ------------------------------------------------------------------------------- 772 0.1563 kallsyms __x86_indirect_thunk_rax 772 100.000 kallsyms __x86_indirect_thunk_rax [self] ------------------------------------------------------------------------------- CPU usage rose from 40% to 80% (at 1.4Ghz) over 6 hours of guest's uptime. ---------- ??????????? ????????? ---------- ????: Re: [Nouveau] qemu -display sdl,gl=on also eats CPU ????: ??????????? 17 ??????? 2020 ???????????: Andrew Randrianasulu <randrianasulu at gmail.com> ??????????: Ilia Mirkin <imirkin at alum.mit.edu>, nouveau at lists.freedesktop.org ? ????????? ?? Monday 17 August 2020 08:09:37 ?? ????????:> The DDX eating CPU isn't intrinsically bad. Did you check where perf > says the CPU time is going? Could be doing copies/etc.I think Xorg ended up eating ~13% CPU after I quit most programs, but it was definitely better than much higher CPU usage before your patches. I saw no additional debug messages in X log, so probably you covered my specific case well. qemu was eating CPU in nouveau_dri.so/libdrm_nouveau.so.2.0.0, so I suspected something like 'too many error reports from vblanks' may happen there, too. Unfortunately, my standard build command for mesa included --strip, so opreport -c was not giving any additional details ... I just recompiled DDX again with if 0'ed debug message, will see how it works alone, and then retry mesa build/qemu long-uptime testing ...> > On Mon, Aug 17, 2020 at 12:52 AM Andrew Randrianasulu > <randrianasulu at gmail.com> 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 at lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/nouveau >-------------------------------------------------------
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