If there are no internal levels and the user priority-shift is zero, we can help the compiler eliminate some dead code:
Function old new delta start_timeslice 169 154 -15 __execlists_submission_tasklet 4696 4659 -37 Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/gt/intel_lrc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 87e6c5bdd2dc..2020e35d59b6 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -446,6 +446,9 @@ static int queue_prio(const struct intel_engine_execlists *execlists) * we have to flip the index value to become priority. */ p = to_priolist(rb); + if (!I915_USER_PRIORITY_SHIFT) + return p->priority; + return ((p->priority + 1) << I915_USER_PRIORITY_SHIFT) - ffs(p->used); } -- 2.20.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
