On Wed, Apr 5, 2017 at 10:43 PM, Chris Wilson <ch...@chris-wilson.co.uk> wrote:
>> 303 frames in 5.0 seconds = 60.424 FPS >> 212 frames in 11.7 seconds = 18.079 FPS > > Overshoots by 6s. that's because, after the first 5 seconds, i did the fvwm2-based "window resize" operation which triggered the "freeze". after probably... mmm... 2 seconds i pressed ctrl-alt-f1 then ctrl-alt-f7 all during 5 seconds which thus gives the apparent reduced framerate. > Check dmesg for a GPU hang. none. > Attach > /sys/class/drm/card0/error. # cat /sys/class/drm/card0/error no error state collected this time i re-ran the test, but left it after triggering a "hang" for more than 5 seconds. the output of the framerate did *NOT* take place until *AFTER* i had "recovered" glxgears running (with ctrl-alt-f1 / ctrl-alt-f2) Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 94 frames in 20.3 seconds = 4.637 FPS 302 frames in 5.0 seconds = 60.275 FPS 300 frames in 5.0 seconds = 59.986 FPS hmmm.... i think it's time for a gdb session... (gdb) where #0 0x00007ffff6b49180 in __poll_nocancel () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007ffff5042150 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007ffff5043c0f in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007ffff5043d81 in xcb_wait_for_reply64 () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #4 0x00007ffff7061018 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6 #5 0x00007ffff76a88ea in ?? () from /usr/lib/x86_64-linux-gnu/libGL.so.1 #6 0x00007ffff76a8c47 in ?? () from /usr/lib/x86_64-linux-gnu/libGL.so.1 #7 0x00007ffff3a899ca in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #8 0x00007ffff3a89f01 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #9 0x00007ffff3a75054 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #10 0x00005555555566be in ?? () #11 0x0000555555555e38 in ?? () #12 0x00007ffff6a8b730 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6 #13 0x000055555555646a in ?? () (gdb) hmmm... where's the debug-symbols package when you need it... let's try strace instead oo that's interesting. this time, when running strace, i did *NOT* get a 100% "guaranteed" hang from resizing the window using fvwm2. instead it took *three attempts*. log file from strace is too large to post, it's at http://hands.com/~lkcl/glxgears.strace.txt l. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
