On Fri, Jan 9, 2015 at 11:39 AM, Neil Roberts <n...@linux.intel.com> wrote:
> Jason Ekstrand <ja...@jlekstrand.net> writes: > > > This improves texture upload performance on the PBO upload test available > > at http://www.songho.ca/opengl/gl_pbo.html by 80% for the non-PBO case > (due > > to avoiding a buffer stall) and 500% for the PBO case. > > Just for reference, if I run this branch against the little test case I > wrote to test my patches I see a 275% increase in frame rate. This is a > somewhat less than what I was seeing with the blorp blitter which gave a > 350% increase. > That doesn't surprise me. I was looking at it with Kristian, and we're seeing about 18 us/call of overhead just from setting up meta. This tells us something we already knew: meta is a pig. If we could avoid that with blorp, it would be nice. > The blorp patches don't work with the pboUnpack test case because that > ends up doing a conversion from BGRA to RGBA. However I suppose there's > no reason why the blorp blitter can't do a conversion as well if we > remove the restriction. > Yeah, that should be possible --Jason > > Regards, > - Neil >
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