>>-----Original Message----- >>From: [email protected] >>[mailto:[email protected]] On >>Behalf Of Clemens Eisserer >>Sent: 2010年10月25日 18:31 >>To: intel-gfx >>Subject: Re: [Intel-gfx] [PATCH] drm/i915: set scan-buffer as uncached on >>Sandybridge >> >>Hi, >> >>> We only need front buffer to be uncached. >>> I think that will not affect performance since GPU will seldom read >>back from front buffer. >>> We will measure performance on that. >> >>At least here I have a couple of apps reading back from frontbuffer, >>and performance on i945+2.13 is horrible. >>No idea if it would be worse on SandyBridge if access is uncached, but >>even slower would *really* hurt.
Are you reading back from CPU or GPU? Thanks Zou Nan hai >> >>- Clemens >>_______________________________________________ >>Intel-gfx mailing list >>[email protected] >>http://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
