[ck]Re: 回复：Re: Re: cgroup2 io weight 没有效果

Hi, I'm using v1. I do not need bfq, but mq-deadline also has no effect. buffer IO is my target(I've added the cgwb_v1 at grub). If no throttle setting, it would be too fast for observation. can you give out a demo shell with 2 different blkio.cost.weight at /sys/fs/cgroup/blkio?? Thanks very much! 在 2022-09-29 15:52:16，"Joseph Qi" <joseph.qi(a)linux.alibaba.com> 写道： > Hi, > > Which cgroup version do you use? cgroup v1 or v2? > > For bfq, I don't have any experience on weight control. > For iocost, better to specify qos and model, according to the documentation > suggested before. > > Seems you've mixed bfq, iocost, block throttle together. I'd suggest you > evaluate them individually and use direct io first. > > Thanks, > Joseph > > On 9/29/22 3:26 PM, 王传国 wrote: >> Hi Joseph, >> Thanks for your reply! But I have 2 questions, : >> 1. why the blkio.bfq.weight has no effect after "echo bfq > /sys/block/vdb/queue/scheduler" >> 2.iocost didn't work either, two fio both got 5M,but 3M and 6M is what I want.Point out my mistakes please! >> Thanks very much! >> And my shell like below: >> >> mount /dev/vdb1 /wcg/data2/ >> >> cd /sys/fs/cgroup/blkio >> >> echo bfq > /sys/block/vdb/queue/scheduler >> >> echo 0 > /sys/block/vdb/queue/iosched/low_latency >> >> echo "253:16 10485760" > blkio.throttle.write_bps_device >> >> echo "253:16 enable=1" > blkio.cost.qos >> >> echo "253:16 ctrl=auto" > blkio.cost.model >> >> echo 0 > /sys/block/vdb/queue/rotational >> >> mkdir fio1 fio2 >> >> echo "253:16 100" > fio1/blkio.cost.weight >> >> echo "253:16 200" > fio2/blkio.cost.weight >> >> >> >> >> echo $$ > /sys/fs/cgroup/blkio/fio1/cgroup.procs >> >> fio -rw=write -ioengine=libaio -bs=4k -size=1G -numjobs=1 -name=/wcg/data2/fio_test1.log >> >> >> >> >> #do follows at another console >> >> echo $$ > /sys/fs/cgroup/blkio/fio2/cgroup.procs >> >> fio -rw=write -ioengine=libaio -bs=4k -size=1G -numjobs=1 -name=/wcg/data2/fio_test2.log >> >> >> >> >> >> >> >> >> >> >> >> 在 2022-09-28 16:41:40，"Joseph Qi" <joseph.qi(a)linux.alibaba.com> 写道： >>> 'io.weight' is for cfq io scheduler, while 'io.bfq.weight' is for bfq io >>> scheduler, as its name indicates. >>> So you may need configure corresponding io scheduler as well. >>> >>> BTW, if you want io weight control, I recommend another approach named io >>> cost. The following documentation may help to understand the details: >>> https://help.aliyun.com/document_detail/155863.html >>> >>> Thanks, >>> Joseph >>> >>> On 9/28/22 1:50 PM, 王传国 wrote: >>>> 各位同仁, >>>> >>>> 我看到cgroup2中有io.weight 和 io.bfq.weight，区别是什么? >>>> >>>> 我的理解是为了控制兄弟group在父group下的IO权重，我在如下版本测试了下，好像结果不太对，谁能指点一下，拜谢！ >>>> >>>> # uname -a >>>> >>>> Linux localhost.localdomain 4.19.91-26.an8.x86_64 #1 SMP Tue May 24 13:10:09 CST 2022 x86_64 x86_64 x86_64 GNU/Linux >>>> >>>> >>>> >>>> 我的测试脚本： >>>> >>>> #change to cgroup2 by adding cgroup_no_v1=all into grub param >>>> >>>> mkdir -p /aaa/cg2 >>>> >>>> mkdir -p /aaa/data2 >>>> >>>> mount -t cgroup2 nodev /aaa/cg2 >>>> >>>> mount /dev/sdb1 /aaag/data2/ >>>> >>>> echo bfq > /sys/block/vdb/queue/scheduler #做或不做 >>>> >>>> >>>> >>>> mkdir /aaa/cg2/test >>>> >>>> echo "+io +memory" > /aaa/cg2/cgroup.subtree_control >>>> >>>> echo "+io +memory" > /aaa/cg2/test/cgroup.subtree_control >>>> >>>> cat /aaa/cg2/test/cgroup.controllers >>>> >>>> echo "8:16 wbps=10485760" > /aaa/cg2/test/io.max >>>> >>>> echo $$ > /aaa/cg2/test/cgroup.procs >>>> >>>> >>>> >>>> mkdir -p /aaa/cg2/test/dd1 >>>> >>>> mkdir -p /aaa/cg2/test/dd2 >>>> >>>> echo 200 > /aaa/cg2/test/dd1/io.weight >>>> >>>> #echo 200 > /aaa/cg2/test/dd1/io.bfq.weight #两个选项都试了 >>>> >>>> >>>> >>>> #在另外2个终端执行如下的2个测试: >>>> >>>> echo $$ > /aaa/cg2/test/dd1/cgroup.procs >>>> >>>> dd if=/dev/zero of=/aaa/data2/ddfile1 bs=128M count=1 >>>> >>>> >>>> >>>> echo $$ > /aaa/cg2/test/dd2/cgroup.procs >>>> >>>> dd if=/dev/zero of=/aaa/data2/ddfile2 bs=128M count=1 >>>> >>>> >>>> >>>> 我得到了两个 500K+, 而不是期望的300K+ and 600K！ >>>> >>>> >>>> >>>> _______________________________________________ >>>> Cloud Kernel mailing list -- cloud-kernel(a)lists.openanolis.cn >>>> To unsubscribe send an email to cloud-kernel-leave(a)lists.openanolis.cn >>> _______________________________________________ >>> Cloud Kernel mailing list -- cloud-kernel(a)lists.openanolis.cn >>> To unsubscribe send an email to cloud-kernel-leave(a)lists.openanolis.cn > _______________________________________________ > Cloud Kernel mailing list -- cloud-kernel(a)lists.openanolis.cn > To unsubscribe send an email to cloud-kernel-leave(a)lists.openanolis.cn > > _______________________________________________ > Cloud Kernel mailing list -- cloud-kernel(a)lists.openanolis.cn > To unsubscribe send an email to cloud-kernel-leave(a)lists.openanolis.cn