[Intel-gfx] [PATCH 10/66] drm/i915: Soften the tasklet flush frequency before waits

[Thomas Hellström (Intel)]

On 2020-07-15 13:50, Chris Wilson wrote:
> We include a tasklet flush before waiting on a request as a precaution
> against the HW being lax in event signaling. We now have a precautionary
> flush in the engine's heartbeat and so do not need to be quite so
> zealous on every request wait. If we focus on the request, the only
> tasklet flush that matters is if there is a delay in submitting this
> request to HW, so if the request is not ready to be executed no
> advantage in reducing this wait can be gained by running the tasklet.
> And there is little point in doing busy work for no result.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Reviewed-by: Thomas Hellström <thomas.hellstrom at intel.com>