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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-28 21:12:03 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-28 22:55:02 +0100 |
| commit | 74093f3eccac232447ef95536c6a359ee7661650 (patch) | |
| tree | c21d5197ce25fe45e5fb8fed4629bf709cee9221 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | f7dc0157e4b5f23780559c6b71d3f7282f6c7f1b (diff) | |
drm/i915: Drop posting reads to flush master interrupts
We do not need to do a posting read of our uncached mmio write to
re-enable the master interrupt lines after handling an interrupt, so
don't. This saves us a slow UC read before we can process the interrupt,
most noticeable in execlists where any stalls imposes extra latency on
GPU command execution.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180628201211.13837-1-chris@chris-wilson.co.uk
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions