From: Vladimir Davydov <vdavydov@parallels.com>
To: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan@kernel.org>,
Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>, Greg Thelen <gthelen@google.com>,
Michel Lespinasse <walken@google.com>,
David Rientjes <rientjes@google.com>,
Pavel Emelyanov <xemul@parallels.com>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Jonathan Corbet <corbet@lwn.net>,
linux-api@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -mm v8 0/7] idle memory tracking
Date: Thu, 16 Jul 2015 13:02:11 +0300 [thread overview]
Message-ID: <20150716100211.GC2001@esperanza> (raw)
In-Reply-To: <CAJu=L59MjY4F4G2bZh+hrt7aqw3R9mWPeYK65smQWUvMhz85aA@mail.gmail.com>
On Wed, Jul 15, 2015 at 01:47:15PM -0700, Andres Lagar-Cavilla wrote:
> I think the remaining question here is performance.
>
> Have you conducted any studies where
> - there is a workload
> - a daemon is poking kpageidle every N seconds/minutes
> - what is the daemon cpu consumption?
> - what is the workload degradation if any?
>
> N candidates include 30 seconds, 1 minute, 2 minutes, 5 minutes....
>
> Workload candidates include TPC, spec int memory intensive things like
> 429.mcf, stream (http://www.cs.virginia.edu/stream/ "sustainable
> memory bandwidth" vs floating point performance)
>
> I'm not asking for a research paper, but if, say, a 2 minute-period
> daemon introduces no degradation and adds up to a minute of cpu per
> hour, then we're golden.
Fair enough. Will do that soon and report back.
Thanks a lot for the review, it was really helpful!
Vladimir
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
prev parent reply other threads:[~2015-07-16 10:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-15 13:54 [PATCH -mm v8 0/7] idle memory tracking Vladimir Davydov
2015-07-15 13:54 ` [PATCH -mm v8 1/7] memcg: add page_cgroup_ino helper Vladimir Davydov
2015-07-15 18:59 ` Andres Lagar-Cavilla
2015-07-15 13:54 ` [PATCH -mm v8 2/7] hwpoison: use page_cgroup_ino for filtering by memcg Vladimir Davydov
2015-07-15 19:00 ` Andres Lagar-Cavilla
2015-07-15 13:54 ` [PATCH -mm v8 3/7] memcg: zap try_get_mem_cgroup_from_page Vladimir Davydov
2015-07-15 13:54 ` [PATCH -mm v8 4/7] proc: add kpagecgroup file Vladimir Davydov
2015-07-15 19:03 ` Andres Lagar-Cavilla
2015-07-16 9:28 ` Vladimir Davydov
2015-07-16 19:04 ` Andres Lagar-Cavilla
2015-07-17 9:27 ` Vladimir Davydov
2015-07-15 13:54 ` [PATCH -mm v8 5/7] mmu-notifier: add clear_young callback Vladimir Davydov
2015-07-15 19:16 ` Andres Lagar-Cavilla
2015-07-16 11:35 ` Paolo Bonzini
2015-07-15 13:54 ` [PATCH -mm v8 6/7] proc: add kpageidle file Vladimir Davydov
2015-07-15 19:42 ` Andres Lagar-Cavilla
2015-07-16 9:53 ` Vladimir Davydov
2015-07-15 13:54 ` [PATCH -mm v8 7/7] proc: export idle flag via kpageflags Vladimir Davydov
2015-07-15 19:17 ` Andres Lagar-Cavilla
2015-07-15 20:47 ` [PATCH -mm v8 0/7] idle memory tracking Andres Lagar-Cavilla
2015-07-16 10:02 ` Vladimir Davydov [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150716100211.GC2001@esperanza \
--to=vdavydov@parallels.com \
--cc=akpm@linux-foundation.org \
--cc=andreslc@google.com \
--cc=cgroups@vger.kernel.org \
--cc=corbet@lwn.net \
--cc=gorcunov@openvz.org \
--cc=gthelen@google.com \
--cc=hannes@cmpxchg.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.cz \
--cc=minchan@kernel.org \
--cc=raghavendra.kt@linux.vnet.ibm.com \
--cc=rientjes@google.com \
--cc=walken@google.com \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).