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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-23 16:31:04 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-24 01:52:10 +0300 |
| commit | a8c51ed22b0ef20205180baa8ed30e05ea6f8505 (patch) | |
| tree | 4010a91befbfb40ee837a0c1171e62676d06f479 /drivers/gpu/drm/i915/Kconfig.profile | |
| parent | a1ceb93a824aaaa8323c90ada987099ce44768c0 (diff) | |
| download | linux-a8c51ed22b0ef20205180baa8ed30e05ea6f8505.tar.xz | |
drm/i915/gt: Try to more gracefully quiesce the system before resets
If we are doing a normal GPU reset triggered after detecting a long
period of stalled work, we can take our time and allow the engines to
quiesce. Since we've stopped submission to the engine, and if we wait
long enough an innocent context should complete, leaving the engine idle.
So by waiting a short amount of time, we should prevent clobbering other
users when resetting a stuck context.
Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Suggested-by: Jon Bloomfield <jon.bloomfield@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191023133108.21401-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/Kconfig.profile')
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig.profile | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile index 48df8889a88a..3a3881d5e44b 100644 --- a/drivers/gpu/drm/i915/Kconfig.profile +++ b/drivers/gpu/drm/i915/Kconfig.profile @@ -25,3 +25,14 @@ config DRM_I915_SPIN_REQUEST May be 0 to disable the initial spin. In practice, we estimate the cost of enabling the interrupt (if currently disabled) to be a few microseconds. + +config DRM_I915_STOP_TIMEOUT + int "How long to wait for an engine to quiesce gracefully before reset (ms)" + default 100 # milliseconds + help + By stopping submission and sleeping for a short time before resetting + the GPU, we allow the innocent contexts also on the system to quiesce. + It is then less likely for a hanging context to cause collateral + damage as the system is reset in order to recover. The corollary is + that the reset itself may take longer and so be more disruptive to + interactive or low latency workloads. |