Keith Packard wrote: > On Fri, 2008-05-16 at 09:28 +0200, Thomas Hellström wrote: > >> Hi. >> >> I have a couple of question w r t the TTM vs GEM discussion: >> >> 1) How does pwrite() avoid clflush()es or wbinvd()s in the i915 gem case? >> > > It doesn't, but as pwrite uses non-temporal stores, the clflush doesn't > affect the cache at all. Of course, if we had to use wbinvd, this would > completely wreck performance. > >
Understood, but what prevents you from using "movnt" from user-space, for example as part of OUT_BATCH() or similar? /Thomas ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
