Re: [RFC][PATCH 0/7] memcg async reclaim

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

On Thu, 12 May 2011 13:22:37 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> On Wed, 11 May 2011 20:51:10 -0700
> Andrew Morton <akpm@linux-foundation.org> wrote:

> Ah, sorry. above was on KVM.  without container.
> ==
> [root@rhel6-test hilow]# time cp ./tmpfile xxx
> 
> real    0m5.197s
> user    0m0.006s
> sys     0m2.599s
> ==
> Hmm, still slow. I'll use real hardware in the next post.
> 

I'm now testing on a real machine with some fixes and see

== without async reclaim ==
real    0m6.569s
user    0m0.006s
sys     0m0.976s

== with async reclaim ==
real    0m6.305s
user    0m0.007s
sys     0m0.907s

...in gneral sys time reduced always but 'real' is in error range ;)
yes, no gain.

I'll check what codes in vmscan.c or /mm affects memcg and post a
required fix in step by step. I think I found some..

Thanks,
-Kame

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