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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-05-19 10:57:46 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-05-24 09:33:37 +0100 |
| commit | 2b050f330f78d02e7f476e55be29d760271ac61c (patch) | |
| tree | 7bbaf0b6aa581373e4a212498f11e949aa86d612 /src/i810_dri.c | |
| parent | dcef703a7cdcf360f12312a338361697acffc3e9 (diff) | |
Use pwrite to upload the batch buffer
By using pwrite() instead of dri_bo_map() we can write to the batch buffer
through the GTT and not be forced to map it back into the CPU domain and
out again, eliminating a double clflush.
Measing x11perf text performance on PineView:
Before:
16000000 trep @ 0.0020 msec (511000.0/sec): Char in 80-char aa line (Charter 10)
16000000 trep @ 0.0021 msec (480000.0/sec): Char in 80-char rgb line (Charter 10)
After:
16000000 trep @ 0.0019 msec (532000.0/sec): Char in 80-char aa line (Charter 10)
16000000 trep @ 0.0020 msec (496000.0/sec): Char in 80-char rgb line (Charter 10)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/i810_dri.c')
0 files changed, 0 insertions, 0 deletions