Slowness is not usually a bug. I guess it can be optimized even more. It depends on where the bottleneck is now.
Marek On Sun, Mar 17, 2013 at 10:14 PM, Rune Kjær Svendsen <runesv...@gmail.com> wrote: > 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 >> > > > > > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev > _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
