[Bug 119631] New: RadeonSI get a huge performance dip with used with the nine state tracker

[Bug 119631] New: RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

            Bug ID: 119631
           Summary: RadeonSI get a huge performance dip with used with the
                    nine state tracker
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.7-rc1
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: b747xx@gmail.com
        Regression: No

Hi,

I have a Radeon 7970HD and I use the Gallium Nine state tracker to play a
specific game (EVE-Online). I did notice that the performance take a big dip
when used with the kernel 4.7-next and -rc1. I did know about a regretion
affecting some opengl game, that might and might not be related.

Using the kernel 4.7, I lose about 1/3 to 2/3 of the fps depending of the
situation.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

Vedran Miletić <vedran@miletic.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vedran@miletic.net

--- Comment #1 from Vedran Miletić <vedran@miletic.net> ---
Compared to 4.6? Can you bisect?

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #2 from Mathieu Belanger <b747xx@gmail.com> ---
Compared to 4.6-rc5
There.

c63dd758589b1f7e8398841d1f443f06ebfbcefc is the first bad commit
commit c63dd758589b1f7e8398841d1f443f06ebfbcefc
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Fri Apr 1 18:51:34 2016 +0900

    drm/radeon: Support DRM_MODE_PAGE_FLIP_ASYNC

    When this flag is set, we program the hardware to execute the flip
    during horizontal blank (i.e. for the next scanline) instead of during
    vertical blank (i.e. for the next frame).

    Currently this is only supported on ASICs which have a page flip
    completion interrupt (>= R600), and only if the use_pflipirq parameter
    has value 2 (the default).

    Reviewed-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 2f3d8295e7fa2809a3546a23c64da33311e624b9
6cd9fd9b53df0942efab559295e4c11fc6cc0463 M      drivers

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

Mathieu Belanger <b747xx@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
Please attach the corresponding Xorg log file, preferably captured after
running EVE-Online.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #4 from Mathieu Belanger <b747xx@gmail.com> ---
Created attachment 219661
  --> https://bugzilla.kernel.org/attachment.cgi?id=219661&action=edit
Xorg log file after running EVE

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #5 from Mathieu Belanger <b747xx@gmail.com> ---
Created attachment 219671
  --> https://bugzilla.kernel.org/attachment.cgi?id=219671&action=edit
dmesg after running EVE

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---
Does the problem also occur with xserver 1.18.3 or newer?

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #7 from Mathieu Belanger <b747xx@gmail.com> ---
Yes, I just updated xserver to 1.18.3, bug still present.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #8 from Michel Dänzer <michel@daenzer.net> ---
Does setting the environment variable thread_submit=true for the EVE-Online
process avoid the problem?

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #9 from Mathieu Belanger <b747xx@gmail.com> ---
No,thread_submit=true  just remove more fps.

Big drop if I run EVE without DRM_MODE_PAGE_FLIP_ASYNC
Small drop if I run EVE with DRM_MODE_PAGE_FLIP_ASYNC

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

Axel Davy <vebveb@hotmail.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vebveb@hotmail.fr

--- Comment #10 from Axel Davy <vebveb@hotmail.fr> ---
Hi,

It looks like to be a bug in gallium nine, wine side. (Though I don't get why
thread_submit=true didn't help)

Please try with the following diff:

https://paste.fedoraproject.org/379178/93261014/

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #11 from Mathieu Belanger <b747xx@gmail.com> ---
I will test the patch this night.

Isn't thread_submit just to fix rendering on DRI PRIME or something like that?

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #12 from Axel Davy <vebveb@hotmail.fr> ---
thread_submit delays submission of buffers to the X server until the moment the
buffer has all rendering finished.

This is useful for DRI PRIME, because the kernel doesn't have yet all the
pieces to have the other card wait for the rendering.
I thought perhaps in your case the issue was that the async flip was taking too
long because it needed to wait for the rendering to finish, but apparently not.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #13 from Mathieu Belanger <b747xx@gmail.com> ---
Tested Axel patch.

It making it better. Instead of loosing about half of the fps, I lose about 10

337 -> 331
175 -> 165

But still have a "small" loss, I don't know if it's normal with
DRM_MODE_PAGE_FLIP_ASYNC or no. Note, I did test the patch with
DRM_MODE_PAGE_FLIP_ASYNC disabled too and did get the same exact fps than
without the patch.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #14 from Michel Dänzer <michel@daenzer.net> ---
The DRM_MODE_PAGE_FLIP_ASYNC change can't have any effect with Axel's patch,
because it explicitly forces the Present operations to be executed as copies
instead of flips. The difference you're seeing must therefore be caused by
something else.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

Thorsten Leemhuis <regressions@leemhuis.info> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |regressions@leemhuis.info

--- Comment #15 from Thorsten Leemhuis <regressions@leemhuis.info> ---
What's the status of this issue? Just wondering, as this issue is listed
in my regression reports for 4.7 and it seems nothing much happened for
more than a week now – which is a bad sign as the 4.7 release seems only
a week or two away.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #16 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Thorsten Leemhuis from comment #15)
> What's the status of this issue? Just wondering, as this issue is listed
> in my regression reports for 4.7 [...]

This isn't a kernel regression. It's a Wine/nine issue.

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

John Brooks <kbt@fastquake.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kbt@fastquake.com

--- Comment #17 from John Brooks <kbt@fastquake.com> ---
Looks like it may actually have been a kernel regression.
https://bugs.freedesktop.org/show_bug.cgi?id=97260#c12

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[Bug 119631] RadeonSI get a huge performance dip with used with the nine state tracker

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=119631

--- Comment #18 from Michel Dänzer <michel@daenzer.net> ---
(In reply to John Brooks from comment #17)
> Looks like it may actually have been a kernel regression.
> https://bugs.freedesktop.org/show_bug.cgi?id=97260#c12

We can't be sure about that until the problem is fully understood / fixed. So
far it still seems more likely that the kernel change triggered an existing
issue somewhere else.

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