[Bug 56634] New: r600g: fix abysmal performance in Reaction Quake : Huge slowdown

[Bug 56634] New: r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

          Priority: medium
            Bug ID: 56634
          Assignee: dri-devel@lists.freedesktop.org
           Summary: r600g: fix abysmal performance in Reaction Quake :
                    Huge slowdown
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: maxijac@free.fr
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Drivers/Gallium/r600
           Product: Mesa

http://cgit.freedesktop.org/mesa/mesa/commit/?id=fa58644855e44830e0b91dc627703c236fa6712a

Huge slowdown in Unigine-heaven (from ~25 fps to ~3 fps)

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #1 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
I see some slowdowns with etqw (can't test heaven) on HD4890 that seem to be
caused by this.

It's not constant - in fact mostly etqw with current head is the fastest I've
ever seen it.

It may, however, during a short timenetdemo just suddenly drop to 4fps for a
few seconds, or it may start slow ~10fps then go full speed.

With this reverted I haven't seen any slowdowns (yet).

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #2 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
Do you mean it's slower than without the commit or is it running mostly at the
same speed when it's slowing down?

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #3 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #2)
> Do you mean it's slower than without the commit or is it running mostly at
> the same speed when it's slowing down?

It's way slower than without the commit, but only temporarily then it recovers.

In case you have etqw, I am testing @1920x1080 fullscreen with everything
turned on/up as high as possible.

I've found another issue, but it's not related to this or llvm and could be
quite old as I've not left etqw running for ~30 mins for some months.

The issue is I run out of mem (4 gig). I'll open a new bug when I've had more
time to test with older kernels.

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #4 from maxijac@free.fr ---
Also affects Xonotic.

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #5 from maxijac@free.fr ---
Using kernel from linus's repo fixes this issue.
Not sure if it is a "proper" fix, so I'll let you close the repoer if it should
be closed.

(now I'm getting 40 fps in heaven , nice boost if we forget about the 3 fps
thing)

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

--- Comment #6 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #5)
> Using kernel from linus's repo fixes this issue.
> Not sure if it is a "proper" fix, so I'll let you close the repoer if it
> should be closed.
> 
> (now I'm getting 40 fps in heaven , nice boost if we forget about the 3 fps
> thing)

etqw is also running normally again with drm-next kernel and current mesa/llvm.

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[Bug 56634] r600g: fix abysmal performance in Reaction Quake : Huge slowdown

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https://bugs.freedesktop.org/show_bug.cgi?id=56634

maxijac@free.fr changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from maxijac@free.fr ---
Using linux 3.8 fixes this so I'm closing.

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