On Wed, 15 Jun 2011 17:03:58 +0100, Chris Wilson <ch...@chris-wilson.co.uk> wrote: > On Wed, 15 Jun 2011 08:08:59 -0700, Eric Anholt <e...@anholt.net> wrote: > > On Wed, 15 Jun 2011 10:39:06 +0100, Chris Wilson <ch...@chris-wilson.co.uk> > > wrote: > > > For the record, on my SugarBay, this patch on top of drm-intel-fixes and > > > mesa.git + your instruction streaming, regresses cairo-xlib 4.5s to 4.7s > > > (4%, with a claim of .1% stddev) and improves cairo-gl from 21.5s to 20.1s > > > (6.5%, with a claim of .5% stddev) for the firefox-talos-gfx. [This is a > > > system that can do under 2s for cairo-xlib using vmap and the perf > > > patches I posted before.] > > > -Chris > > > > I was testing with semaphores enabled on the LLC series. I'm curious > > how this revert could possibly regress cairo-xlib, though -- that seems > > very strange. > > Moving back to LLC+semaphores (2.6.39-rc2+), firefox-talos-gfx: > xlib: 4.473 > gl: 20.753 > > applying the patch: > xlib: 4.472 > gl: 20.824 > > I'm just not reproducing the same issue you are seeing. Are you using a > standard distro Kconfig, or if not, can you send me yours? > -Chris
http://people.freedesktop.org/~anholt/dotconfig Pushed my kernel tree to "gtt-revert" branch. Fresh set of numbers on two fresh boots, just about as identical testing environments as I could produce: (without revert) anholt@eliezer:src/cairo/perf% cat /home/anholt/cairogl-before 21791099815 21677090234 22060471069 22049244399 21721362892 21966143347 (with revert) anholt@eliezer:src/cairo/perf% cat /home/anholt/cairogl-after 19162606198 19127697366 19462253708 19172535715 19339999910 19221539215 anholt@eliezer:src/cairo/perf% ministat ~/cairogl-before ~/cairogl-after x /home/anholt/cairogl-before + /home/anholt/cairogl-after +------------------------------------------------------------------------------+ | + x| |++ + + + xx x x x| ||__A___| |___A__M_|| +------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 6 2.167709e+10 2.2060471e+10 2.1966143e+10 2.1877569e+10 1.6902073e+08 + 6 1.9127697e+10 1.9462254e+10 1.9221539e+10 1.9247772e+10 1.2847426e+08 Difference at 95.0% confidence -2.6298e+09 +/- 1.93108e+08 -12.0205% +/- 0.882677% (Student's t, pooled s = 1.50123e+08)
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