Re: 回复: [RFC PATCH V3] raid1: rewrite the iobarrier ― Linux RAID Storage

[NeilBrown <neilb@suse.de>]

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On Thu, 12 Sep 2013 14:21:05 +0800 majianpeng <majianpeng@gmail.com> wrote:

> Hi Neil,
> 	How about this patchset?
> Thanks!
> Jianpeng Ma

Sorry - it fell of my todo list.  I might not be able to look at it properly
for a few weeks (due to leave) but I'll make sure it stays on my list.

NeilBrown

> >Patch1/2/3 are only to easy implemented for patch4.They don't effect the performance.
> >
> >Performance Result:
> >Requirement:
> >A: sync_speed_max = sync_speed_min = 200000
> >B: echo repair > sync_action
> >
> >Without the patch3:
> >TestA:
> >fio --rw=read --bs=512k --filename=/dev/md0 --offset=1000199467008 --rate=50M --ratemin=30M --name=test --runtime=600s
> >>>READ: io=8861.6MB, aggrb=15123KB/s, minb=15123KB/s, maxb=15123KB/s, mint=600012msec, maxt=600012msec
> >cat /proc/mdstat
> >>>speed=25522K/sec
> >
> >TestB:
> >fio --rw=write --bs=512k --filename=/dev/md0 --offset=1000199467008 --rate=50M --name=test --runtime=600s
> >>>WRITE: io=1939.6MB, aggrb=3309KB/s, minb=3309KB/s, maxb=3309KB/s, mint=600033msec, maxt=600033msec
> >cat /proc/mdstat
> >>>speed=7732K/sec
> >
> >
> >With the patch3:
> >TestA:(Make sure the position of read after resync)
> >fio --rw=read --bs=512k --filename=/dev/md0 --offset=1000199467008  --rate=50m  --name=test 
> >>>READ: io=12547MB, aggrb=40810KB/s, minb=40810KB/s, maxb=40810KB/s, mint=314815msec, maxt=314815msec
> >cat /proc/mdstat:
> >>>speed=43745K/sec
> >
> >TestB:(Make sure the position of write after resync)
> >fio --rw=write --bs=512k --filename=/dev/md0 --offset=1000199467008 --rate=50m  --name=test --runtime=600
> >>>WRITE: io=30001MB, aggrb=51200KB/s, minb=51200KB/s, maxb=51200KB/s, mint=600001msec, maxt=600001msec
> >cat /proc/mdstat
> >>>speed=26686K/sec
> >
> >TestC:(Make sure the position of read before resync)
> >fio --rw=read --bs=512k --filename=/dev/md0 --offset=0 --rate=50m --name=test --runtime=600
> >>>READ: io=29725MB, aggrb=50729KB/s, minb=50729KB/s, maxb=50729KB/s, mint=600004msec, maxt=600004msec
> >cat /proc/mdstat
> >>>speed=44839K/sec
> >
> >TestD:(Make sure the positon of write before resync)
> >fio --rw=write --bs=512k --filename=/dev/md0 --offset=0 --rate=50m --name=test --runtime=600
> >>> WRITE: io=30001MB, aggrb=51200KB/s, minb=51200KB/s, maxb=51200KB/s, mint=600001msec, maxt=600001msec
> >cat /proc/mdstat
> >>>speed=30884K/sec
> >
> >V3:
> >	patch1: rename a paramter make it more understandable.
> >	patch2: not change.
> >	patch3 draw from patch3 of V2.
> >	patch4: reconstruct some code
> >            rename some parameters make it more understandable.
> >			modify some trivial bugs.
> >
> >V2:http://www.spinics.net/lists/raid/msg44138.html
> >
> >V1:http://www.spinics.net/lists/raid/msg41710.html
> >
> >
> >Jianpeng Ma (4):
> >  raid1: Add a filed array_frozen to indicate whether raid in freeze    
> >    state.
> >  radi1: Relace raise_barrier/lower_barrrier with
> >    freeze_array/unfreeze_array for reconfigure the array.
> >  raid1: Add some macros to make code clearly.
> >  raid1: Rewrite the implementation of iobarrier.
> >
> > drivers/md/raid1.c | 151 +++++++++++++++++++++++++++++++++++++++++++----------
> > drivers/md/raid1.h |  15 ++++++
> > 2 files changed, 137 insertions(+), 29 deletions(-)
> >
> >-- 
> >1.8.1.2

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