[Bug 107376] Raven: `flush_delayed_work()` takes 500 ms

[Bug 107376] Raven: `flush_delayed_work()` takes 500 ms

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https://bugs.freedesktop.org/show_bug.cgi?id=107376

            Bug ID: 107376
           Summary: Raven: `flush_delayed_work()` takes 500 ms
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: pmenzel+bugs.freedesktop@molgen.mpg.de

Created attachment 140811
  --> https://bugs.freedesktop.org/attachment.cgi?id=140811&action=edit
HTML output of `sudo ./sleepgraph.py -config config/suspend-callgraph.cfg`
(devicelist: amdgpu, maxdepth: 12)

Created attachment 140810 [details]
HTML output of `sudo ./sleepgraph.py -config config/suspend-callgraph.cfg`
(devicelist: amdgpu, maxdepth: 12)

Profiling the suspend and resume time [1] on a MSI B350M MORTAR (MS-7A37) with
AMD Ryzen 3 2200G with Radeon Vega Graphics with Linux 4.18-rc6+ and
amd-staging-drm-next [2], `pci_pm_suspend()` takes over one second, which is
too long [3], cf. bug 107278 [3].

This is spent in `amdgpu_device_ip_resume_phase2()`, where 505 ms are spent in
`flush_delayed_work()`.

•   flush_delayed_work (505.026 ms @ 98.640854)
    […]
    •   flush_work (505.017 ms @ 98.640863)
        […]
        •   wait_for_completion (504.985 ms @ 98.640894)
            […]
            •    schedule_timeout (504.963 ms @ 98.640914)
                 […]
                 •   schedule (504.963 ms @ 98.640914)

[1]: https://01.org/suspendresume
[2]: https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next
[3]: https://bugs.freedesktop.org/show_bug.cgi?id=107278

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[Bug 107376] Raven: `flush_delayed_work()` takes 500 ms

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https://bugs.freedesktop.org/show_bug.cgi?id=107376

Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |107278


Referenced Bugs:

https://bugs.freedesktop.org/show_bug.cgi?id=107278
[Bug 107278] Raven: pci_pm_resume takes over 1 second
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[Bug 107376] Raven: `flush_delayed_work()` takes 500 ms

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https://bugs.freedesktop.org/show_bug.cgi?id=107376

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

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

--- Comment #1 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/464.

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