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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-28 16:17:14 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-29 01:03:43 +0300 |
| commit | 72338a1f5ef8a480184aac48bcc8e9f7d4d0d0a5 (patch) | |
| tree | 0a4208c6e42213312c82dac7d4c28e9e1fd2eb24 /drivers/gpu/drm/i915/Kconfig.profile | |
| parent | 062444bbc6859dbe9991673ffd377a4af4d76d51 (diff) | |
| download | linux-72338a1f5ef8a480184aac48bcc8e9f7d4d0d0a5.tar.xz | |
drm/i915/gt: Expose reset stop timeout via sysfs
When we allow ourselves to sleep before a GPU reset after disabling
submission, even for a few milliseconds, gives an innocent context the
opportunity to clear the GPU before the reset occurs. However, how long
to sleep depends on the typical non-preemptible duration (a similar
problem to determining the ideal preempt-reset timeout or even the
heartbeat interval). As this seems of a hard policy decision, punt it to
userspace.
The timeout can be adjusted using
/sys/class/drm/card?/engine/*/stop_timeout_ms
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Reviewed-by: Steve Carbonari <steven.carbonari@intel.com>
Tested-by: Steve Carbonari <steven.carbonari@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200228131716.3243616-5-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/Kconfig.profile')
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig.profile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile index 9ee3b59685b9..5f4ec3aec1d2 100644 --- a/drivers/gpu/drm/i915/Kconfig.profile +++ b/drivers/gpu/drm/i915/Kconfig.profile @@ -63,6 +63,9 @@ config DRM_I915_STOP_TIMEOUT that the reset itself may take longer and so be more disruptive to interactive or low latency workloads. + This is adjustable via + /sys/class/drm/card?/engine/*/stop_timeout_ms + config DRM_I915_TIMESLICE_DURATION int "Scheduling quantum for userspace batches (ms, jiffy granularity)" default 1 # milliseconds |