[Bug 98549] Extremly low x11perf putimage score with glamor on i956
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Nov 2 13:42:18 UTC 2016
https://bugs.freedesktop.org/show_bug.cgi?id=98549
Bug ID: 98549
Summary: Extremly low x11perf putimage score with glamor on
i956
Product: Mesa
Version: 12.0
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/i965
Assignee: intel-3d-bugs at lists.freedesktop.org
Reporter: linuxhippy at gmail.com
QA Contact: intel-3d-bugs at lists.freedesktop.org
When using glamor on top of the i965 driver (haswell GPU), the x11perf
-putimage10 score is extremly low, while shmput10 is quite fast:
20000 trep @ 1.2639 msec ( 791.0/sec): PutImage 10x10 square
14000000 trep @ 0.0019 msec (537000.0/sec): ShmPutImage 10x10 square
a netbook based on AMD's mullins chip (low-power jaguar cores) is fast for both
operations:
800000 trep @ 0.0344 msec ( 29000.0/sec): PutImage 10x10 square
800000 trep @ 0.0356 msec ( 28100.0/sec): ShmPutImage 10x10 square
This issue slows down Java's antialiased rendering a lot (it doesn't use
trapezoids for AA geometry, instead it uploads 32x32 coverage masks using
XPutImage and later uses this data as mask for XRenderComposite).
As more and more distributions switch to glamor directly or indirectly
(XWayland or X+modesetting) it would be great to see this fixed.
Laptop:
Vendor: Intel Open Source Technology Center (0x8086)
Device: Mesa DRI Intel(R) Haswell Mobile (0xa16)
Version: 12.0.3
Accelerated: yes
Video memory: 1536MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 3.3
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
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