On Mon, 26 Mar 2012 10:10:27 +0200, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > From: Chris Wilson <chris at chris-wilson.co.uk> > > We try to avoid writing the relocations through the uncached GTT, if the > buffer is currently in the CPU write domain and so will be flushed out to > main memory afterwards anyway. Also on SandyBridge we can safely write > to the pages in cacheable memory, so long as the buffer is LLC mapped. > In either of these caches, we therefore do not need to force the s/caches/cases/ > reallocation of the buffer into the mappable region of the GTT, reducing > the aperture pressure. -Chris -- Chris Wilson, Intel Open Source Technology Centre
