When allocating wc/uc pages cache state transition requires cache flush which is expensive operation. To avoid cache flushes allocation of wc/uc pages should be done in large groups when only single cache flush is required for whole group of pages.
In some cases drivers need t oallocate and deallocate many pages in a short time frame. In this case we can avoid cache flushes if we keep pages in the pool before actually freeing them later. arch/x86 was missing set_pages_array_wc and set_memory_array_wc. Patch 6 and 7 add missing functions and hooks set_pages_array_wc to the pool allocator. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
