commit 63eacb74267a5a2776a215b529ab1a6f6939b80b Author: Tomohiro Kusumi <kusumi.tomoh...@gmail.com> Date: Sun Jul 2 21:30:08 2017 +0300
sbin/hammer: Move cache to tailq end when get_buffer_data() has a valid cache This is the same as what get_buffer() does when new allocation is not needed. This hasn't been done in get_buffer_data() when the given non NULL buffer is the one to look for. This seems to make newfs_hammer a bit faster, as the i/o size is normally large enough to invoke eviction of HAMMER userspace buffer cache while running, starting from the head of the tailq. -- before this commit # for x in 1 2 3 4 5; do > (time newfs_hammer -L TEST /dev/da1 /dev/da2 /dev/da3 > /dev/null) 2>&1 | grep real > done real 0m20.291s real 0m20.574s real 0m22.347s real 0m21.562s real 0m20.991s -- with this commit # for x in 1 2 3 4 5; do > (time newfs_hammer -L TEST /dev/da1 /dev/da2 /dev/da3 > /dev/null) 2>&1 | grep real > done real 0m18.023s real 0m18.064s real 0m18.104s real 0m17.646s real 0m18.310s Summary of changes: sbin/hammer/ondisk.c | 2 ++ 1 file changed, 2 insertions(+) http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/63eacb74267a5a2776a215b529ab1a6f6939b80b -- DragonFly BSD source repository