On Wed, Aug 28, 2019 at 05:19:17PM +0800, Shaokun Zhang wrote: > From: Yang Guo <guoyang2@xxxxxxxxxx> > > @es_stats_cache_hits and @es_stats_cache_misses are accessed frequently in > ext4_es_lookup_extent function, it would influence the ext4 read/write > performance in NUMA system. Let's optimize it using percpu_counter, > it is profitable for the performance. > > The test command is as below: > fio -name=randwrite -numjobs=8 -filename=/mnt/test1 -rw=randwrite > -ioengine=libaio -direct=1 -iodepth=64 -sync=0 -norandommap > -group_reporting -runtime=120 -time_based -bs=4k -size=5G > > And the result is better 10% than the initial implement: > without the patch，IOPS=197k, BW=770MiB/s (808MB/s)(90.3GiB/120002msec) > with the patch, IOPS=218k, BW=852MiB/s (894MB/s)(99.9GiB/120002msec) > > Cc: "Theodore Ts'o" <tytso@xxxxxxx> > Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx> > Cc: Eric Biggers <ebiggers@xxxxxxxxxx> > Signed-off-by: Yang Guo <guoyang2@xxxxxxxxxx> > Signed-off-by: Shaokun Zhang <zhangshaokun@xxxxxxxxxxxxx> Thanks, applied. - Ted
