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. v3: Remove long timeout algorithm and replace with hard coded value (review feedback from Tvrtko). Also, fix execlist selftest failure and fix bug in compute enabling patch related to pre-emption timeouts. v4: Add multiple BUG_ONs to re-check already range checked values (Tvrtko) v5: Add FIXMEs and drm_notices about setting non-default heartbeat periods (Tvrtko) Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx> John Harrison (4): drm/i915/guc: Limit scheduling properties to avoid overflow drm/i915: Fix compute pre-emption w/a to apply to compute engines drm/i915: Make the heartbeat play nice with long pre-emption timeouts drm/i915: Improve long running compute w/a for GuC submission drivers/gpu/drm/i915/Kconfig.profile | 26 ++++- drivers/gpu/drm/i915/gt/intel_engine.h | 6 ++ drivers/gpu/drm/i915/gt/intel_engine_cs.c | 102 +++++++++++++++--- .../gpu/drm/i915/gt/intel_engine_heartbeat.c | 39 +++++++ drivers/gpu/drm/i915/gt/sysfs_engines.c | 25 +++-- drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 21 ++++ .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 8 ++ 7 files changed, 199 insertions(+), 28 deletions(-) -- 2.37.3
