Messages in this thread | | | Subject | Re: [PATCH -next 0/3] md/raid10: reduce lock contention for io | From | Yu Kuai <> | Date | Wed, 31 Aug 2022 19:55:15 +0800 |
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Hi!
在 2022/08/29 21:40, Guoqing Jiang 写道: > > > On 8/29/22 9:14 PM, Yu Kuai wrote: >> From: Yu Kuai <yukuai3@huawei.com> >> >> patch 1 is a small problem found by code review. >> patch 2 avoid holding resync_lock in fast path. >> patch 3 avoid holding lock in wake_up() in fast path. >> >> Test environment: >> >> Architecture: aarch64 >> Cpu: Huawei KUNPENG 920, there are four numa nodes >> >> Raid10 initialize: >> mdadm --create /dev/md0 --level 10 --bitmap none --raid-devices 4 >> /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1 >> >> Test cmd: >> 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: >> before this patchset: 2.9 GiB/s >> after this patchset: 6.6 Gib/s > > Impressive! Pls try mdadm test suites too to avoid regression. > >> Please noted that in kunpeng-920, memory access latency is very bad >> accross nodes compare to local node, and in other architecture >> performance improvement might not be significant. > > By any chance can someone try with x64?
I tried to test with Intel(R) Xeon(R) Platinum 8380 CPU @ 2.30GHz,
before this patchset: 7.0 GiB/s after this patchset : 9.3 GiB/s
Thanks, Kuai > > Thanks, > Guoqing > . >
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