[Bug 105171] Performance regression running glamor with PutImage workload

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105171

            Bug ID: 105171
           Summary: Performance regression running glamor with PutImage
                    workload
           Product: Mesa
           Version: 17.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: linuxhippy at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 137456
  --> https://bugs.freedesktop.org/attachment.cgi?id=137456&action=edit
test case

After updating Fedora from mesa-17.2.4 to 17.3.5 I noticed throughput in
XPutImage/XShmPutImage based workloads dropped significantly.

I'd noticed this before with a self-compiled version of mesa-18.0-rc, but
thought this had something to do with the chosen compile flags.

One test went from 40fps to 15fps (very small XPutImage requests immideatly
followed by XRenderComposite), while other degraded by about 30%.

System details:
* AMD Kaveri 7650k
* 4k + FullHD displays
* linux 4.15.3
* radeon kernel driver


How to test:
Run the attached java program and enable the "antialising" checkbox:
java -jar JGears2.jar

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