On Sat, 06 Nov 2010 01:44:59 +0000, Peter Clifton <[email protected]> wrote: > I've been playing with my app again, and whilst it seems a tiny bit > faster in benchmarks, since the 2D driver change: > > commit 8ff37667bf864b771d16a58fc5041cb48408b6a8 > Author: Eric Anholt <[email protected]> > Date: Tue Nov 2 10:36:03 2010 -0700 > > Remove the intermittent GEM_THROTTLE call. > > > I've noticed the latency / interactivity is WAY down, and I've also had > intermittent GPU hangs whilst benchmarking which I'd never seen before. > > It might be unrelated (as I'm running a back-ported drm-intel-next, and > just pulled it up to date), but for a quick check, I just reverted to a > previous 2D driver just prior to the above commit, and interactivity has > improved a lot (I don't have a number for it, just from testing). > > Presumably this says something bad about my app, or its benchmarking > code. Any clues as to what that is? > > Without the commit, I can use other X11 apps whilst my PCB program is > benchmarking. With it, the X11 server graphics almost completely freeze > up.
I'm seeing this too, with vblank_mode=0 and various apps. Something appears to be broken with the swapbuffers waits in the GL driver, perhaps.
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