On Wed 25-11-20 14:24:45, Feng Tang wrote:
[...]
> I think we finally found the trick :), further debugging shows it
> is not related to the alignment inside one cacheline, but the
> adjacency of 2 adjacent cacheliens (2N and 2N+1, one pair of 128 bytes).
>
> For structure mem_cgroup, member
On Tue, Nov 24, 2020 at 10:24 PM Feng Tang wrote:
>
> And with the following patch to relayout these members, the regression
> is restored and event better. while reducing 64 bytes of sizeof
> 'struct mem_cgroup'
Thanks, applied.
I do wonder if somebody on the hardware side inside Intel might
On 11/25/20 1:24 AM, Feng Tang wrote:
On Fri, Nov 20, 2020 at 07:44:24PM +0800, Feng Tang wrote:
On Fri, Nov 13, 2020 at 03:34:36PM +0800, Feng Tang wrote:
I would rather focus on a more effective mem_cgroup layout. It is very
likely that we are just stumbling over two counters here.
Could
On Fri, Nov 20, 2020 at 07:44:24PM +0800, Feng Tang wrote:
> On Fri, Nov 13, 2020 at 03:34:36PM +0800, Feng Tang wrote:
> > > I would rather focus on a more effective mem_cgroup layout. It is very
> > > likely that we are just stumbling over two counters here.
> > >
> > > Could you try to add
On Fri, Nov 20, 2020 at 02:19:44PM +0100, Michal Hocko wrote:
> On Fri 20-11-20 19:44:24, Feng Tang wrote:
> > On Fri, Nov 13, 2020 at 03:34:36PM +0800, Feng Tang wrote:
> > > On Thu, Nov 12, 2020 at 03:16:54PM +0100, Michal Hocko wrote:
> > > > > > > I add one phony page_counter after the union
On Fri 20-11-20 19:44:24, Feng Tang wrote:
> On Fri, Nov 13, 2020 at 03:34:36PM +0800, Feng Tang wrote:
> > On Thu, Nov 12, 2020 at 03:16:54PM +0100, Michal Hocko wrote:
> > > > > > I add one phony page_counter after the union and re-test, the
> > > > > > regression
> > > > > > reduced to -1.2%.
On Fri, Nov 13, 2020 at 03:34:36PM +0800, Feng Tang wrote:
> On Thu, Nov 12, 2020 at 03:16:54PM +0100, Michal Hocko wrote:
> > > > > I add one phony page_counter after the union and re-test, the
> > > > > regression
> > > > > reduced to -1.2%. It looks like the regression caused by the data
> >
On Thu, Nov 12, 2020 at 11:43:45AM -0500, Waiman Long wrote:
> >>We tried below patch to make the 'page_counter' aligned.
> >> diff --git a/include/linux/page_counter.h b/include/linux/page_counter.h
> >> index bab7e57..9efa6f7 100644
> >> --- a/include/linux/page_counter.h
> >> +++
On Thu, Nov 12, 2020 at 03:16:54PM +0100, Michal Hocko wrote:
> On Thu 12-11-20 20:28:44, Feng Tang wrote:
> > Hi Michal,
> >
> > On Wed, Nov 04, 2020 at 09:15:46AM +0100, Michal Hocko wrote:
> > > > > > Hi Michal,
> > > > > >
> > > > > > We used the default configure of cgroups, not sure what
On 11/12/20 9:16 AM, Michal Hocko wrote:
On Thu 12-11-20 20:28:44, Feng Tang wrote:
Hi Michal,
On Wed, Nov 04, 2020 at 09:15:46AM +0100, Michal Hocko wrote:
Hi Michal,
We used the default configure of cgroups, not sure what configuration you
want,
could you give me more details? and here is
On Thu 12-11-20 20:28:44, Feng Tang wrote:
> Hi Michal,
>
> On Wed, Nov 04, 2020 at 09:15:46AM +0100, Michal Hocko wrote:
> > > > > Hi Michal,
> > > > >
> > > > > We used the default configure of cgroups, not sure what configuration
> > > > > you
> > > > > want,
> > > > > could you give me more
Hi Michal,
On Wed, Nov 04, 2020 at 09:15:46AM +0100, Michal Hocko wrote:
> > > > Hi Michal,
> > > >
> > > > We used the default configure of cgroups, not sure what configuration
> > > > you
> > > > want,
> > > > could you give me more details? and here is the cgroup info of
> > > >
On Wed 04-11-20 09:20:04, Xing Zhengjun wrote:
>
>
> On 11/2/2020 6:02 PM, Michal Hocko wrote:
> > On Mon 02-11-20 17:53:14, Rong Chen wrote:
> > >
> > >
> > > On 11/2/20 5:27 PM, Michal Hocko wrote:
> > > > On Mon 02-11-20 17:15:43, kernel test robot wrote:
> > > > > Greeting,
> > > > >
> >
On 11/3/20 8:20 PM, Xing Zhengjun wrote:
On 11/2/2020 6:02 PM, Michal Hocko wrote:
On Mon 02-11-20 17:53:14, Rong Chen wrote:
On 11/2/20 5:27 PM, Michal Hocko wrote:
On Mon 02-11-20 17:15:43, kernel test robot wrote:
Greeting,
FYI, we noticed a -22.7% regression of
On 11/2/2020 6:02 PM, Michal Hocko wrote:
On Mon 02-11-20 17:53:14, Rong Chen wrote:
On 11/2/20 5:27 PM, Michal Hocko wrote:
On Mon 02-11-20 17:15:43, kernel test robot wrote:
Greeting,
FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to
commit:
commit:
On Mon 02-11-20 17:53:14, Rong Chen wrote:
>
>
> On 11/2/20 5:27 PM, Michal Hocko wrote:
> > On Mon 02-11-20 17:15:43, kernel test robot wrote:
> > > Greeting,
> > >
> > > FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due
> > > to commit:
> > >
> > >
> > > commit:
On 11/2/20 5:27 PM, Michal Hocko wrote:
On Mon 02-11-20 17:15:43, kernel test robot wrote:
Greeting,
FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to
commit:
commit: bd0b230fe14554bfffbae54e19038716f96f5a41 ("mm/memcg: unify swap and memsw
page counters")
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