From ff7806e52c4e9b7c522e59ba8514c5c6e3fa8683 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 7 Apr 2014 13:09:46 +0100 Subject: gem_tiled_swapping: Purge all page/swap caches first Reset the system to a vanilla state before we query how much RAM/swap space is available for our testing. Signed-off-by: Chris Wilson --- lib/intel_os.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'lib/intel_os.c') diff --git a/lib/intel_os.c b/lib/intel_os.c index 6f0621c7..7d9a703a 100644 --- a/lib/intel_os.c +++ b/lib/intel_os.c @@ -185,6 +185,19 @@ intel_get_total_swap_mb(void) return retval / (1024*1024); } +void +intel_purge_vm_caches(void) +{ + int fd; + + fd = open("/proc/sys/vm/drop_caches", O_RDWR); + if (fd < 0) + return; + + write(fd, "3\n", 2); + close(fd); +} + /* * When testing a port to a new platform, create a standalone test binary -- cgit v1.2.3