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SubjectRe: [RFC][PATCH] memcg soft limit (yet another new design) v1
* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-03-31 09:06:07]:

> On Sat, 28 Mar 2009 23:57:47 +0530
> Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>
> > * Balbir Singh <balbir@linux.vnet.ibm.com> [2009-03-28 23:41:00]:
> >
> > > * KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-03-27 13:59:33]:
> > >
> > > > ==brief test result==
> > > > On 2CPU/1.6GB bytes machine. create group A and B
> > > > A. soft limit=300M
> > > > B. no soft limit
> > > >
> > > > Run a malloc() program on B and allcoate 1G of memory. The program just
> > > > sleeps after allocating memory and no memory refernce after it.
> > > > Run make -j 6 and compile the kernel.
> > > >
> > > > When vm.swappiness = 60 => 60MB of memory are swapped out from B.
> > > > When vm.swappiness = 10 => 1MB of memory are swapped out from B
> > > >
> > > > If no soft limit, 350MB of swap out will happen from B.(swapiness=60)
> > > >
> > >
> > > I ran the same tests, booted the machine with mem=1700M and maxcpus=2
> > >
> > > Here is what I see with
> >
> > I meant to say, Here is what I see with my patches (v7)
> >
>
> your malloc program is like this ?
>
> int main(int argc, char *argv[])
> {
> c = malloc(1G);
> memset(c, 0, 1G);
> getc();
> }
>

Very similar, instead of memset, we go integer by integer and set it
to 0, do two loops of touching and wait for user input before exiting.


--
Balbir


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