[Bug 26350] New: Single corruption (artifacts) on engine reclocking

[Bug 26350] New: Single corruption (artifacts) on engine reclocking

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26350

           Summary: Single corruption (artifacts) on engine reclocking
           Product: DRI
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: zajec5@gmail.com


Engine reclocking is too slow and so artifacts are visible when it happens. We
need to make it faster.


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[Bug 26350] Single corruption (artifacts) on engine reclocking

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26350





--- Comment #1 from Rafał Miłecki <zajec5@gmail.com>  2010-01-31 09:28:14 PST ---
Created an attachment (id=32948)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32948)
Switch AtomBIOS parser to udelay

Dave noticed we lost a lot of time when sleeping in AtomBIOS. Switching to
udelay drastically improves this.


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[Bug 26350] Single corruption (artifacts) on engine reclocking

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26350





--- Comment #2 from Rafał Miłecki <zajec5@gmail.com>  2010-01-31 09:30:52 PST ---
Created an attachment (id=32949)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32949)
Switch engine clock setting to registers operations

It may be good idea to perform sensible operations manually, without parsing
AtomBIOS commands. Unfortunately it needs rewriting AtomBIOS code for each GPU
generation.


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[Bug 26350] Single corruption (artifacts) on engine reclocking

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26350





--- Comment #3 from Rafał Miłecki <zajec5@gmail.com>  2010-01-31 09:39:33 PST ---
Created an attachment (id=32950)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32950)
Full results of my speed test

Currently reclocking engine takes averagely .005152s. That's way too long.

Using Dave's patch I went down to averagely .000287s.
With registers patch went down to averagely .000267s.

Using both patches gave even nicer result:  .000185s.
Both + my patch hacked (to use "while" op): .000177s.

In every case corruptions were gone.

About hacked version of my patch, I switched to using "while" (just like
AtomBIOS does) instead of waiting in "for" for bit in 0x600.


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[Bug 26350] Single corruption (artifacts) on engine reclocking

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=26350

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #4 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/90.

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