Re: [Intel-gfx] [PATCH 0/3] Improve anti-pre-emption w/a for compute workloads

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 18/02/2022 21:33, John.C.Harrison@Intel.com wrote:
> From: John Harrison <John.C.Harrison@Intel.com>
> 
> 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

Can we have a feature request to allow asking GuC for an engine reset?

Regards,

Tvrtko

> to a big value. Also, update the heartbeat to allow such a long
> pre-emption delay in the final heartbeat period.
> 
> Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
> 
> 
> 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_cs.c     | 37 +++++++++++++++++--
>   .../gpu/drm/i915/gt/intel_engine_heartbeat.c  | 16 ++++++++
>   drivers/gpu/drm/i915/gt/sysfs_engines.c       | 14 +++++++
>   drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h   |  9 +++++
>   4 files changed, 73 insertions(+), 3 deletions(-)
>