[Bug 98549] Extremly low x11perf putimage score with glamor on i956

[bugzilla-daemon at freedesktop.org]

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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