[Bug 101198] Major performance regression for AMD card - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 101198] Major performance regression for AMD card
Date: Fri, 26 May 2017 11:55:17 +0000	[thread overview]
Message-ID: <bug-101198-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=101198

            Bug ID: 101198
           Summary: Major performance regression for AMD card
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: dark.shadow4@web.de
        QA Contact: dri-devel@lists.freedesktop.org

With the latest git mesa, there are major performance drops. First noticed the
issue with the 32bit steam game "Move or die", but it seems to affect the whole
system. It basically makes the game unplayable.

Bisecting pointed me to the following commit:

commit 524d4fff9e0e58e812e71bc5ba2c92ffa73bee16
Author: Leo Liu <leo.liu@amd.com>
Date:   Wed May 3 14:06:35 2017 -0400

    amd/common: add vcn dec ip info query

    Signed-off-by: Leo Liu <leo.liu@amd.com>
    Reviewed-by: Christian König <christian.koenig@amd.com>

I tried reverting it, but it doesn't apply cleanly.

Running Arch Linux 64
Linux 4.11.2

System the issue was tested on:
- Arch Linux 64bit
- Linux 4.11.2, AMDGPU driver
- Radeon R9 285

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