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| author |   Song Liu <song@kernel.org> | 2022-09-19 11:42:07 -0700 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2022-09-22 00:05:05 -0700 |
| commit | 74173ff458de5841d7fa4c6fcc85011daa21adf5 (patch) | |
| tree | e68cc5787d8330edd314232e3bdb9deac95594f8 /drivers/md/raid5.c | |
| parent | md: Remove extra mddev_get() in md_seq_start() (diff) | |
| parent | md/raid10: convert resync_lock to use seqlock (diff) | |
| download | linux-dev-74173ff458de5841d7fa4c6fcc85011daa21adf5.tar.xz linux-dev-74173ff458de5841d7fa4c6fcc85011daa21adf5.zip | |
Merge branch 'md-next-raid10-optimize' into md-next
This patchset tries to avoid that two locks are held unconditionally
in hot path.
Test environment:
Architecture:
aarch64 Huawei KUNPENG 920
x86 Intel(R) Xeon(R) Platinum 8380
Raid10 initialize:
mdadm --create /dev/md0 --level 10 --bitmap none --raid-devices 4 \
/dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1
Test cmd:
(task set -c 0-15) fio -name=0 -ioengine=libaio -direct=1 -\
group_reporting=1 -randseed=2022 -rwmixread=70 -refill_buffers \
-filename=/dev/md0 -numjobs=16 -runtime=60s -bs=4k -iodepth=256 \
-rw=randread
Test result:
aarch64:
before this patchset: 3.2 GiB/s
bind node before this patchset: 6.9 Gib/s
after this patchset: 7.9 Gib/s
bind node after this patchset: 8.0 Gib/s
x86:(bind node is not tested yet)
before this patchset: 7.0 GiB/s
after this patchset : 9.3 GiB/s
Please noted that in the test machine, memory access latency is very bad
across nodes compare to local node in aarch64, which is why bandwidth
while bind node is much better.
Diffstat (limited to 'drivers/md/raid5.c')
0 files changed, 0 insertions, 0 deletions