On Mon, Jun 01, 2015 at 11:11:15AM +0100, Tvrtko Ursulin wrote: > From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > > Current userptr kernel implementation downgrades tracking VMA ranges (real > userspace ones) to an inefficient linear walk for any process which has > instantiated overlapping userptr objects. > > This adds a test which shows the performance cliff on, most visibly, generic > userspace mmap(2) and munmap(2) operations between unsync, non-overlapping > and overlapping userptr objects. > > Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Thomas Daniel <thomas.daniel@xxxxxxxxx> Looked good, pushed. Thanks, -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
