Thank you very much! This is much better. It's gone from 0.5-ish FPS when zooming in to around 10 FPS, depending on screen content.
So I figure this isn't a bug? I assumed it was a bug, but is the case simply that an efficient glReadPixels path for radeon/gallium doesn't exist? The patch set sure helps in that regard, although it'd be really nice to get 30 FPS consistently, if at all possible. Thanks again. /Rune On Sun, Mar 17, 2013 at 6:46 PM, Andreas Boll <andreas.boll....@gmail.com>wrote: > 2013/3/17 Rune Kjær Svendsen <runesv...@gmail.com>: > > Hello list > > > > I'm having problems recording the desktop content using the Weston > > compositor's built-in recording function. When I start a recording and do > > something that changes a lot of screen content (like zooming in on the > > desktop, for example), I get around 0.5 FPS. Using sysprof, I can see > that > > ~98% of CPU is used in the function unpack_XRGB8888(). krh has told me > this > > is caused by glReadPixels going through a slowpath. I have a Radeon HD > 5770 > > GPU and I'm using mesa git (I've tried the mesa version in the Ubuntu > 12.10 > > repos, and the xorg-edgers PPA, same result). > > > > Does anyone know what the issue could be, or how to debug the problem > > further? > > > > This patch series [1] should help. You might want to try it. > > [1] http://lists.freedesktop.org/archives/mesa-dev/2013-March/036214.html > > > Doing some debugging, it seems the call to ctx->Driver.ReadPixels() in > > _mesa_ReadnPixelsARB leads to _mesa_readpixels() being called in > readpix.c. > > > > I'm attaching some output of gdb that will hopefully be useful. > > > > I'm also attaching the debug terminal output of running Weston with the > DRM > > backend. > > > > Let me know if I can provide other useful information. > > > > _______________________________________________ > > mesa-dev mailing list > > mesa-dev@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/mesa-dev > > >
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