From: John Harrison <John.C.Harrison@xxxxxxxxx>
Compute workloads are inherently not pre-emptible on current hardware.
Thus the pre-emption timeout was disabled as a workaround to prevent
unwanted resets. Instead, the hang detection was left to the heartbeat
and its (longer) timeout. This is undesirable with GuC submission as
the heartbeat is a full GT reset rather than a per engine reset and so
is much more destructive. Instead, just bump the pre-emption timeout
to a big value. Also, update the heartbeat to allow such a long
pre-emption delay in the final heartbeat period.
v2: Add clamping helpers.
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
John Harrison (3):
drm/i915/guc: Limit scheduling properties to avoid overflow
drm/i915/gt: Make the heartbeat play nice with long pre-emption
timeouts
drm/i915: Improve long running OCL w/a for GuC submission
drivers/gpu/drm/i915/gt/intel_engine.h | 6 ++
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 91 ++++++++++++++++++-
.../gpu/drm/i915/gt/intel_engine_heartbeat.c | 16 ++++
drivers/gpu/drm/i915/gt/sysfs_engines.c | 25 +++--
drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 9 ++
5 files changed, 134 insertions(+), 13 deletions(-)
--
2.25.1
