From b483e68173465408649e11122ee78060af9394f7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 10 Aug 2015 18:45:00 +0100 Subject: benchmarks/gem_exec_trace: Mark the mmap as sequentially read Use madvise(MADV_SEQUENTIAL) to let the kernel optimise for our straightforward sequential read pattern. Signed-off-by: Chris Wilson --- benchmarks/gem_exec_trace.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'benchmarks/gem_exec_trace.c') diff --git a/benchmarks/gem_exec_trace.c b/benchmarks/gem_exec_trace.c index 598527ce..398fdaec 100644 --- a/benchmarks/gem_exec_trace.c +++ b/benchmarks/gem_exec_trace.c @@ -225,6 +225,11 @@ static void replay(const char *filename) ptr = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0); close(fd); + if (ptr == MAP_FAILED) + return; + + madvise(ptr, st.st_size, MADV_SEQUENTIAL); + end = ptr + st.st_size; fd = drm_open_any(); -- cgit v1.2.3