Messages in this thread | | | Date | Mon, 4 May 2009 20:23:04 +0900 | Subject | Re: [PATCH] range-bw: Another I/O scheduling policy of dm-ioband supporting the predicable I/O bandwidth (range bandwidth) | From | Dong-Jae Kang <> |
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Hi, Ryo
I released bug-fixed range-bw(V1) controller several minutes ago
Although several WARNINGs of checkpatch are remained, but patch file was strictly checked by checkpatch.pl It was very time-consuming job :) Thank you for your advice
>> >> > I used fio 1.22. The below is a script which I actually ran. >> > >> > #!/bin/sh >> > dev1=/dev/sdb4 # SATA disk >> > echo "0 $(sudo blockdev --getsize $dev1) ioband $dev1 share2 0 0 >> > cgroup range-bw 0" | sudo dmsetup create ioband1 >> > >> > arg="--time_based --runtime=10 --ioengine=libaio --iodepth=50 \ >> > --direct=1 --norandommap" >> > >> > dmsetup message ioband1 0 attach 2 >> > dmsetup message ioband1 0 attach 3 >> > dmsetup message ioband1 0 min-bw 2:100 >> > dmsetup message ioband1 0 max-bw 2:100 >> > dmsetup message ioband1 0 min-bw 3:200 >> > dmsetup message ioband1 0 max-bw 3:200 >> >> I recommend it is better to use different value in min-bw and max-bw >> because its concept is to support range-bw with the minimum >> guaranteeing and maximum limitation. >> exampe - min-bw : 1024 / max-bw : 3072 >> >> > echo $$ > /cgroup/grp1/tasks >> > fio $arg --rw=randread --name=grp1 --filename=/dev/mapper/ioband1 \ >> > --output=r2-1.log & >> > echo $$ > /cgroup/grp2/tasks >> > fio $arg --rw=randread --name=grp2 --filename=/dev/mapper/ioband1 \ >> > --output=r2-2.log & >> > wait
after bug-fix,I evaluated range-bw according to your configuration and test environment the result is in new relesed range-bw mail, [PATCH 0/2] and more detailed documentation is also available and it can be referred in [PATCH 1/2]
Ryo, can you check the result ?
> bio-cgroup is renamed to bklio-cgroup. :) > I don't clearly understand about range-bw but I think that you don't > need to consider to support them and it should be taken care of by > blkio-cgroup and the common part of dm-ioband, not the policy > implementation. Do you have any problems with AIO or delayed write?
if you are interested in range-bw, more information is available to you and any questions and comments about range-bw is always welcom. :)
Ryo, blkio-cgroup can be applied to dm-ioband ver1.10.3 without modification? I didn't check blkio-cgroup yet.
Thank you >> -- >> Best Regards, >> Dong-Jae Kang >
-- Best Regards, Dong-Jae Kang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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