drm/i915/selftests: Unroll the CS frequency loop

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Having noticed that MI_BB_START is incurring a memory stall (see the
correlation with uncore frequency), we have to unroll the loop in order
to diminish the impact of the MI_BB_START on the instruction throughput.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200421171351.19575-1-chris@chris-wilson.co.uk

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Chris Wilson 2020-04-21 18:13:51 +01:00

parent bd3ec9e758

commit 33883310cd

1 changed files with 20 additions and 13 deletions

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drivers/gpu/drm/i915/gt/selftest_rps.c

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