From: Xiaokang <xiaokang.qin@intel.com>
To: Dave Hansen <dave.hansen@intel.com>, linux-mm@kvack.org
Cc: fengwei.yin@intel.com
Subject: Re: [PATCH] proc/smaps: add proportional size of anonymous page
Date: Mon, 10 Nov 2014 17:29:51 +0800 [thread overview]
Message-ID: <5460858F.5050608@intel.com> (raw)
In-Reply-To: <545D3AFB.1080308@intel.com>
On 11/08/2014 05:34 AM, Dave Hansen wrote:
> On 11/07/2014 12:31 AM, Xiaokang Qin wrote:
>> The "proportional anonymous page size" (PropAnonymous) of a process is the count of
>> anonymous pages it has in memory, where each anonymous page is devided by the number
>> of processes sharing it.
>
> This seems like the kind of thing that should just be accounted for in
> the existing pss metric. Why do we need a new, separate one?
>
Hi, Dave
For some case especially under Android, anonymous page sharing is
common, for example:
70323000-70e41000 rw-p 00000000 fd:00 120004
/data/dalvik-cache/x86/system@framework@boot.art
Size: 11384 kB
Rss: 8840 kB
Pss: 927 kB
Shared_Clean: 5720 kB
Shared_Dirty: 2492 kB
Private_Clean: 16 kB
Private_Dirty: 612 kB
Referenced: 7896 kB
Anonymous: 3104 kB
PropAnonymous: 697 kB
AnonHugePages: 0 kB
Swap: 0 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Locked: 0 kB
The only Anonymous here is confusing to me. What I really want to know
is how many anonymous page is there in Pss. After exposing
PropAnonymous, we could know 697/927 is anonymous in Pss.
I suppose the Pss - PropAnonymous = Proportional Page cache size for
file based memory and we want to break down the page cache into process
level, how much page cache each process consumes.
Regards,
Xiaokang
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prev parent reply other threads:[~2014-11-10 9:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-07 8:31 [PATCH] proc/smaps: add proportional size of anonymous page Xiaokang Qin
2014-11-07 21:34 ` Dave Hansen
2014-11-10 8:48 ` Qin, Xiaokang
2014-11-10 17:03 ` Dave Hansen
2014-11-11 14:40 ` Xiaokang
2014-11-11 15:22 ` Dave Hansen
2014-11-10 9:29 ` Xiaokang [this message]
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