[Mesa-dev] XPutImage performance off cliff running glamor on top of radeonsi >= 17.3.0
linuxhippy at gmail.com
Tue Feb 20 10:20:51 UTC 2018
The following change towards 17.3.0 seems to cause servre performance
regressions in radeonsi for glamor based workloads when XPutImage is
involved (typically quite common for X11 apps):
I didn't notice it until recently, when Fedora27 was updated to 17.3.4 :/
x11per -putimage10 regressed from 75 kOps/s to 22 kOps/s after this
patch running Xephyr with vblank disabled.
400000 reps @ 0.0130 msec ( 77000.0/sec): PutImage 10x10 square
120000 reps @ 0.0457 msec ( 21900.0/sec): PutImage 10x10 square
Best regards, Clemens
8b3a257851905ff444d981e52938cbf2b36ba830 is the first bad commit
Author: Marek Olšák <marek.olsak at amd.com>
Date: Tue Jul 18 16:08:44 2017 -0400
radeonsi: set a per-buffer flag that disables inter-process sharing (v4)
For lower overhead in the CS ioctl.
Winsys allocators are not used with interprocess-sharable resources.
v2: It shouldn't crash anymore, but the kernel will reject the new flag.
v3 (christian): Rename the flag, avoid sending those buffers in the BO list.
v4 (christian): Remove setting the kernel flag for now
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
:040000 040000 b775b6b0ea5b971d2165a644ea8912c120f54431
2e4b2737f37ede2bbdbbe6815fe0fa562177c2b7 M src
More information about the mesa-dev