* [RFC][-mm] [2/2] Simple stats for memory resource controller
@ 2008-04-05 18:10 Balaji Rao
2008-04-06 6:23 ` Balbir Singh
2008-04-14 14:39 ` Balbir Singh
0 siblings, 2 replies; 12+ messages in thread
From: Balaji Rao @ 2008-04-05 18:10 UTC (permalink / raw)
To: linux-kernel; +Cc: containers, menage, balbir, dhaval
This patch implements trivial statistics for the memory resource controller.
Signed-off-by: Balaji Rao <balajirrao@gmail.com>
CC: Balbir Singh <balbir@linux.vnet.ibm.com>
CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a860765..ca98b21 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
*/
MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
+ MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
+ MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
MEM_CGROUP_STAT_NSTATS,
};
@@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
else
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
+
+ if (charge)
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
+ else
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
}
static struct mem_cgroup_per_zone *
@@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
} mem_cgroup_stat_desc[] = {
[MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
[MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
+ [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
+ [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
};
static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
--
regards,
Balaji Rao
Dept. of Mechanical Engineering,
National Institute of Technology Karnataka, India
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-05 18:10 [RFC][-mm] [2/2] Simple stats for memory resource controller Balaji Rao
@ 2008-04-06 6:23 ` Balbir Singh
2008-04-14 14:39 ` Balbir Singh
1 sibling, 0 replies; 12+ messages in thread
From: Balbir Singh @ 2008-04-06 6:23 UTC (permalink / raw)
To: Balaji Rao; +Cc: linux-kernel, containers, menage, balbir, dhaval
Balaji Rao wrote:
> This patch implements trivial statistics for the memory resource controller.
>
> Signed-off-by: Balaji Rao <balajirrao@gmail.com>
> CC: Balbir Singh <balbir@linux.vnet.ibm.com>
> CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index a860765..ca98b21 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
> */
> MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
> MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
> + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
> + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
>
> MEM_CGROUP_STAT_NSTATS,
> };
> @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
> else
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
> +
> + if (charge)
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
> + else
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
> }
>
> static struct mem_cgroup_per_zone *
> @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
> } mem_cgroup_stat_desc[] = {
> [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
> + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
> };
>
> static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
>
Looks good to me. I wonder if pgpin/pggout per second will be a useful metric,
to see how fast things are changing within the cgroup.
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Let me test this patch right away.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-05 18:10 [RFC][-mm] [2/2] Simple stats for memory resource controller Balaji Rao
2008-04-06 6:23 ` Balbir Singh
@ 2008-04-14 14:39 ` Balbir Singh
2008-04-14 14:40 ` Balbir Singh
2008-04-28 16:00 ` Balaji Rao
1 sibling, 2 replies; 12+ messages in thread
From: Balbir Singh @ 2008-04-14 14:39 UTC (permalink / raw)
To: Balaji Rao; +Cc: linux-kernel, containers, menage, balbir, dhaval
Balaji Rao wrote:
> This patch implements trivial statistics for the memory resource controller.
>
> Signed-off-by: Balaji Rao <balajirrao@gmail.com>
> CC: Balbir Singh <balbir@linux.vnet.ibm.com>
> CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index a860765..ca98b21 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
> */
> MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
> MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
> + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
> + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
>
> MEM_CGROUP_STAT_NSTATS,
> };
> @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
> else
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
> +
> + if (charge)
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
> + else
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
> }
>
> static struct mem_cgroup_per_zone *
> @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
> } mem_cgroup_stat_desc[] = {
> [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
> + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
> };
>
> static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Hi, Andrew,
Could you please include these statistics in -mm.
Balbir
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-14 14:39 ` Balbir Singh
@ 2008-04-14 14:40 ` Balbir Singh
2008-04-28 16:00 ` Balaji Rao
1 sibling, 0 replies; 12+ messages in thread
From: Balbir Singh @ 2008-04-14 14:40 UTC (permalink / raw)
To: Andrew Morton
Cc: Balaji Rao, linux-kernel, containers, menage, balbir, dhaval
Balbir Singh wrote:
> Balaji Rao wrote:
>> This patch implements trivial statistics for the memory resource controller.
>>
>> Signed-off-by: Balaji Rao <balajirrao@gmail.com>
>> CC: Balbir Singh <balbir@linux.vnet.ibm.com>
>> CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
>>
>> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>> index a860765..ca98b21 100644
>> --- a/mm/memcontrol.c
>> +++ b/mm/memcontrol.c
>> @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
>> */
>> MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
>> MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
>> + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
>> + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
>>
>> MEM_CGROUP_STAT_NSTATS,
>> };
>> @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
>> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
>> else
>> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
>> +
>> + if (charge)
>> + __mem_cgroup_stat_add_safe(stat,
>> + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
>> + else
>> + __mem_cgroup_stat_add_safe(stat,
>> + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
>> }
>>
>> static struct mem_cgroup_per_zone *
>> @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
>> } mem_cgroup_stat_desc[] = {
>> [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
>> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
>> + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
>> + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
>> };
>>
>> static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
>>
>
> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
>
> Hi, Andrew,
>
> Could you please include these statistics in -mm.
>
> Balbir
>
>
Andrew,
This should have been addressed to you in the first place. Resending.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-14 14:39 ` Balbir Singh
2008-04-14 14:40 ` Balbir Singh
@ 2008-04-28 16:00 ` Balaji Rao
2008-04-28 16:40 ` Andrew Morton
1 sibling, 1 reply; 12+ messages in thread
From: Balaji Rao @ 2008-04-28 16:00 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, containers, menage, balbir, dhaval
On Monday 14 April 2008 08:09:48 pm Balbir Singh wrote:
> Balaji Rao wrote:
> > This patch implements trivial statistics for the memory resource controller.
> >
> > Signed-off-by: Balaji Rao <balajirrao@gmail.com>
> > CC: Balbir Singh <balbir@linux.vnet.ibm.com>
> > CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
> >
> > diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> > index a860765..ca98b21 100644
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
> > */
> > MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
> > MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
> > + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
> > + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
> >
> > MEM_CGROUP_STAT_NSTATS,
> > };
> > @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
> > __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
> > else
> > __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
> > +
> > + if (charge)
> > + __mem_cgroup_stat_add_safe(stat,
> > + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
> > + else
> > + __mem_cgroup_stat_add_safe(stat,
> > + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
> > }
> >
> > static struct mem_cgroup_per_zone *
> > @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
> > } mem_cgroup_stat_desc[] = {
> > [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
> > [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> > + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
> > + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
> > };
> >
> > static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
> >
>
> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
>
> Hi, Andrew,
>
> Could you please include these statistics in -mm.
>
> Balbir
>
>
Hi Andrew,
Now that Balbir Singh has ACKed it, could you please include it in -mm ?
--
Warm Regards,
Balaji Rao
Dept. of Mechanical Engineering
NITK
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-28 16:00 ` Balaji Rao
@ 2008-04-28 16:40 ` Andrew Morton
2008-04-28 18:03 ` Balbir Singh
0 siblings, 1 reply; 12+ messages in thread
From: Andrew Morton @ 2008-04-28 16:40 UTC (permalink / raw)
To: Balaji Rao; +Cc: linux-kernel, containers, menage, balbir, dhaval
On Mon, 28 Apr 2008 21:30:29 +0530 Balaji Rao <balajirrao@gmail.com> wrote:
> On Monday 14 April 2008 08:09:48 pm Balbir Singh wrote:
> > Balaji Rao wrote:
> > > This patch implements trivial statistics for the memory resource controller.
> > >
> > > Signed-off-by: Balaji Rao <balajirrao@gmail.com>
> > > CC: Balbir Singh <balbir@linux.vnet.ibm.com>
> > > CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
> > >
> > > diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> > > index a860765..ca98b21 100644
> > > --- a/mm/memcontrol.c
> > > +++ b/mm/memcontrol.c
> > > @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
> > > */
> > > MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
> > > MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
> > > + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
> > > + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
> > >
> > > MEM_CGROUP_STAT_NSTATS,
> > > };
> > > @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
> > > __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
> > > else
> > > __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
> > > +
> > > + if (charge)
> > > + __mem_cgroup_stat_add_safe(stat,
> > > + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
> > > + else
> > > + __mem_cgroup_stat_add_safe(stat,
> > > + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
> > > }
> > >
> > > static struct mem_cgroup_per_zone *
> > > @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
> > > } mem_cgroup_stat_desc[] = {
> > > [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
> > > [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> > > + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
> > > + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
> > > };
> > >
> > > static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
> > >
> >
> > Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
> >
> > Hi, Andrew,
> >
> > Could you please include these statistics in -mm.
> >
> > Balbir
> >
> >
> Hi Andrew,
>
> Now that Balbir Singh has ACKed it, could you please include it in -mm ?
<looks>
I guess we can add this one, sure. But [patch 1/2] needs work.
- The local_irq_save()-around-for_each_possible_cpu() locking doesn't
make sense.
- indenting is busted in account_user_time() and account_system_time()
- The use of for_each_possible_cpu() can be grossly inefficient. It
would be preferred to use for_each_possible_cpu() and add a cpu-hotplug
notifier.
- The proposed newly-added userspace interfaces are undocumented
- The changelogs don't explain why we might want this feature in Linux.
- Generally: there are a heck of a lot of different ways of accounting
for things in core kernel and it's really sad to see yet another one
being added.
Actually, [patch 2/2] adds new kerenl->user interfaces and doesn't document
them. But afaict the existing memcgroup stats are secret too.
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-28 16:40 ` Andrew Morton
@ 2008-04-28 18:03 ` Balbir Singh
2008-04-29 5:42 ` KAMEZAWA Hiroyuki
0 siblings, 1 reply; 12+ messages in thread
From: Balbir Singh @ 2008-04-28 18:03 UTC (permalink / raw)
To: Andrew Morton
Cc: Balaji Rao, linux-kernel, containers, menage, balbir, dhaval
Andrew Morton wrote:
> On Mon, 28 Apr 2008 21:30:29 +0530 Balaji Rao <balajirrao@gmail.com> wrote:
>
>> On Monday 14 April 2008 08:09:48 pm Balbir Singh wrote:
>>> Balaji Rao wrote:
>>>> This patch implements trivial statistics for the memory resource controller.
>>>>
>>>> Signed-off-by: Balaji Rao <balajirrao@gmail.com>
>>>> CC: Balbir Singh <balbir@linux.vnet.ibm.com>
>>>> CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
>>>>
>>>> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>>>> index a860765..ca98b21 100644
>>>> --- a/mm/memcontrol.c
>>>> +++ b/mm/memcontrol.c
>>>> @@ -47,6 +47,8 @@ enum mem_cgroup_stat_index {
>>>> */
>>>> MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
>>>> MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
>>>> + MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
>>>> + MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
>>>>
>>>> MEM_CGROUP_STAT_NSTATS,
>>>> };
>>>> @@ -198,6 +200,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
>>>> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
>>>> else
>>>> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
>>>> +
>>>> + if (charge)
>>>> + __mem_cgroup_stat_add_safe(stat,
>>>> + MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
>>>> + else
>>>> + __mem_cgroup_stat_add_safe(stat,
>>>> + MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
>>>> }
>>>>
>>>> static struct mem_cgroup_per_zone *
>>>> @@ -897,6 +906,8 @@ static const struct mem_cgroup_stat_desc {
>>>> } mem_cgroup_stat_desc[] = {
>>>> [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
>>>> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
>>>> + [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
>>>> + [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
>>>> };
>>>>
>>>> static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
>>>>
>>> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
>>>
>>> Hi, Andrew,
>>>
>>> Could you please include these statistics in -mm.
>>>
>>> Balbir
>>>
>>>
>> Hi Andrew,
>>
>> Now that Balbir Singh has ACKed it, could you please include it in -mm ?
>
> <looks>
>
> I guess we can add this one, sure. But [patch 1/2] needs work.
>
> - The local_irq_save()-around-for_each_possible_cpu() locking doesn't
> make sense.
>
Yes, that needs re-work. Peter Zijlstra had detailed review comments for the patch
> - indenting is busted in account_user_time() and account_system_time()
>
> - The use of for_each_possible_cpu() can be grossly inefficient. It
> would be preferred to use for_each_possible_cpu() and add a cpu-hotplug
> notifier.
>
> - The proposed newly-added userspace interfaces are undocumented
>
Yes, we need more documentation
> - The changelogs don't explain why we might want this feature in Linux.
>
We need more accurate utime/stime per cgroup. Summing them in user space is
insufficient, since tasks can move across groups and what we have is accumulated
time per task.
> - Generally: there are a heck of a lot of different ways of accounting
> for things in core kernel and it's really sad to see yet another one
> being added.
>
We thought of summing up stuff in user space, we've look harder. The plan is to
finally send all the data using cgroupstats.
>
> Actually, [patch 2/2] adds new kerenl->user interfaces and doesn't document
> them. But afaict the existing memcgroup stats are secret too.
>
The statistics was added as a part of git commit
d52aa412d43827033a8e2ce4415ef6e8f8d53635. I'll go ahead and try to document
them. These patches piggy back on the statistics patches and add pagein/pageout
counts, which is a useful statistic for the memory controller.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-04-28 18:03 ` Balbir Singh
@ 2008-04-29 5:42 ` KAMEZAWA Hiroyuki
0 siblings, 0 replies; 12+ messages in thread
From: KAMEZAWA Hiroyuki @ 2008-04-29 5:42 UTC (permalink / raw)
To: balbir; +Cc: Andrew Morton, dhaval, linux-kernel, containers, menage,
Balaji Rao
On Mon, 28 Apr 2008 23:33:05 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> The statistics was added as a part of git commit
> d52aa412d43827033a8e2ce4415ef6e8f8d53635. I'll go ahead and try to document
> them. These patches piggy back on the statistics patches and add pagein/pageout
> counts, which is a useful statistic for the memory controller.
>
I'm sorry for lack of documentation.
BTW, when you adds documentation on this pagein/pageout, please make it clear
1. pagein means a new page is newly acconted to this cgrop, doesn't means
a page is read from disk.
2. pageout means a page is dropped from this cgroup, doesn't means a page
is written into disk.
So, pagein/pageout is a bit ambiguous. I'm happy if you find better names.
Thanks,
-Kame
^ permalink raw reply [flat|nested] 12+ messages in thread
* [RFC][-mm] [2/2] Simple stats for memory resource controller
@ 2008-03-26 18:18 Balaji Rao
2008-03-26 18:52 ` Paul Menage
2008-03-26 18:54 ` Balbir Singh
0 siblings, 2 replies; 12+ messages in thread
From: Balaji Rao @ 2008-03-26 18:18 UTC (permalink / raw)
To: linux-kernel; +Cc: containers, menage, balbir, dhaval
This patch implements trivial statistics for the memory resource controller.
Signed-off-by: Balaji Rao <balajirrao@gmail.com>
CC: Balbir Singh <balbir@linux.vnet.ibm.com>
CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index eb681a6..84f3fe5 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -45,6 +45,8 @@ enum mem_cgroup_stat_index {
*/
MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
+ MEM_CGROUP_STAT_PGIN_COUNT, /* # of pages paged in */
+ MEM_CGROUP_STAT_PGOUT_COUNT, /* # of pages paged out */
MEM_CGROUP_STAT_NSTATS,
};
@@ -196,6 +198,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
else
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
+
+ if (charge)
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGIN_COUNT, 1);
+ else
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGOUT_COUNT, 1);
}
static struct mem_cgroup_per_zone *
@@ -886,6 +895,8 @@ static const struct mem_cgroup_stat_desc {
} mem_cgroup_stat_desc[] = {
[MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
[MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
+ [MEM_CGROUP_STAT_PGIN_COUNT] = {"page_in_count", 1, },
+ [MEM_CGROUP_STAT_PGOUT_COUNT] = {"page_out_count", 1, },
};
static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-03-26 18:18 Balaji Rao
@ 2008-03-26 18:52 ` Paul Menage
2008-03-26 18:53 ` Balbir Singh
2008-03-26 18:54 ` Balbir Singh
1 sibling, 1 reply; 12+ messages in thread
From: Paul Menage @ 2008-03-26 18:52 UTC (permalink / raw)
To: Balaji Rao; +Cc: linux-kernel, containers, balbir, dhaval
On Wed, Mar 26, 2008 at 11:18 AM, Balaji Rao <balajirrao@gmail.com> wrote:
> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> + [MEM_CGROUP_STAT_PGIN_COUNT] = {"page_in_count", 1, },
> + [MEM_CGROUP_STAT_PGOUT_COUNT] = {"page_out_count", 1, },
> };
>
Should these be called "pgpgin" and "pgpgout" for consistency with /proc/vmstat?
Paul
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-03-26 18:52 ` Paul Menage
@ 2008-03-26 18:53 ` Balbir Singh
0 siblings, 0 replies; 12+ messages in thread
From: Balbir Singh @ 2008-03-26 18:53 UTC (permalink / raw)
To: Paul Menage; +Cc: Balaji Rao, linux-kernel, containers, balbir, dhaval
Paul Menage wrote:
> On Wed, Mar 26, 2008 at 11:18 AM, Balaji Rao <balajirrao@gmail.com> wrote:
>> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
>> + [MEM_CGROUP_STAT_PGIN_COUNT] = {"page_in_count", 1, },
>> + [MEM_CGROUP_STAT_PGOUT_COUNT] = {"page_out_count", 1, },
>> };
>>
>
> Should these be called "pgpgin" and "pgpgout" for consistency with /proc/vmstat?
>
> Paul
Yes, that is a good name. We also want to instantaneous metrics like
page_in_count per second and page_out_count per second to help the administrator
monitor what is going on within the tasks in the cgroup w.r.t. memory.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [RFC][-mm] [2/2] Simple stats for memory resource controller
2008-03-26 18:18 Balaji Rao
2008-03-26 18:52 ` Paul Menage
@ 2008-03-26 18:54 ` Balbir Singh
1 sibling, 0 replies; 12+ messages in thread
From: Balbir Singh @ 2008-03-26 18:54 UTC (permalink / raw)
To: Balaji Rao; +Cc: linux-kernel, containers, menage, balbir, dhaval
Balaji Rao wrote:
> This patch implements trivial statistics for the memory resource controller.
>
> Signed-off-by: Balaji Rao <balajirrao@gmail.com>
> CC: Balbir Singh <balbir@linux.vnet.ibm.com>
> CC: Dhaval Giani <dhaval@linux.vnet.ibm.com>
>
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index eb681a6..84f3fe5 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -45,6 +45,8 @@ enum mem_cgroup_stat_index {
> */
> MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
> MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
> + MEM_CGROUP_STAT_PGIN_COUNT, /* # of pages paged in */
> + MEM_CGROUP_STAT_PGOUT_COUNT, /* # of pages paged out */
>
> MEM_CGROUP_STAT_NSTATS,
> };
> @@ -196,6 +198,13 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *mem, int flags,
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
> else
> __mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
> +
> + if (charge)
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGIN_COUNT, 1);
> + else
> + __mem_cgroup_stat_add_safe(stat,
> + MEM_CGROUP_STAT_PGOUT_COUNT, 1);
> }
>
> static struct mem_cgroup_per_zone *
> @@ -886,6 +895,8 @@ static const struct mem_cgroup_stat_desc {
> } mem_cgroup_stat_desc[] = {
> [MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
> [MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
> + [MEM_CGROUP_STAT_PGIN_COUNT] = {"page_in_count", 1, },
> + [MEM_CGROUP_STAT_PGOUT_COUNT] = {"page_out_count", 1, },
> };
>
> static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
Looks simple and nice. Please see Paul's mail on the suggested name change as well
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2008-04-29 5:37 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-04-05 18:10 [RFC][-mm] [2/2] Simple stats for memory resource controller Balaji Rao
2008-04-06 6:23 ` Balbir Singh
2008-04-14 14:39 ` Balbir Singh
2008-04-14 14:40 ` Balbir Singh
2008-04-28 16:00 ` Balaji Rao
2008-04-28 16:40 ` Andrew Morton
2008-04-28 18:03 ` Balbir Singh
2008-04-29 5:42 ` KAMEZAWA Hiroyuki
-- strict thread matches above, loose matches on Subject: below --
2008-03-26 18:18 Balaji Rao
2008-03-26 18:52 ` Paul Menage
2008-03-26 18:53 ` Balbir Singh
2008-03-26 18:54 ` Balbir Singh
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).