From: Tony Luck <tony.luck@gmail.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"Larry Woodman" <lwoodman@redhat.com>,
"Peter Zijlstra" <a.p.zijlstra@chello.nl>,
"Pekka Enberg" <penberg@cs.helsinki.fi>,
"Eduard - Gabriel Munteanu" <eduard.munteanu@linux360.ro>,
"Andrew Morton" <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
"KOSAKI Motohiro" <kosaki.motohiro@jp.fujitsu.com>,
"Andi Kleen" <andi@firstfloor.org>,
"Matt Mackall" <mpm@selenic.com>,
"Alexey Dobriyan" <adobriyan@gmail.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags
Date: Tue, 28 Apr 2009 11:11:52 -0700 [thread overview]
Message-ID: <12c511ca0904281111r10f37a5coe5a2750f4dbfbcda@mail.gmail.com> (raw)
In-Reply-To: <20090428083320.GB17038@localhost>
On Tue, Apr 28, 2009 at 1:33 AM, Wu Fengguang <fengguang.wu@intel.com> wrote:
> 1) FAST
>
> It takes merely 0.2s to scan 4GB pages:
>
> ./page-types 0.02s user 0.20s system 99% cpu 0.216 total
OK on a tiny system ... but sounds painful on a big
server. 0.2s for 4G scales up to 3 minutes 25 seconds
on a 4TB system (4TB systems were being sold two
years ago ... so by now the high end will have moved
up to 8TB or perhaps 16TB).
Would the resulting output be anything but noise on
a big system (a *lot* of pages can change state in
3 minutes)?
-Tony
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next prev parent reply other threads:[~2009-04-28 18:11 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-28 1:09 [PATCH 0/5] proc: export more page flags in /proc/kpageflags (take 4) Wu Fengguang
2009-04-28 1:09 ` [PATCH 1/5] pagemap: document clarifications Wu Fengguang
2009-04-28 7:11 ` Tommi Rantala
2009-04-28 1:09 ` [PATCH 2/5] pagemap: documentation 9 more exported page flags Wu Fengguang
2009-04-28 1:09 ` [PATCH 3/5] mm: introduce PageHuge() for testing huge/gigantic pages Wu Fengguang
2009-04-28 1:09 ` [PATCH 4/5] proc: kpagecount/kpageflags code cleanup Wu Fengguang
2009-04-28 1:09 ` [PATCH 5/5] proc: export more page flags in /proc/kpageflags Wu Fengguang
2009-04-28 6:55 ` Ingo Molnar
2009-04-28 7:40 ` Andi Kleen
2009-04-28 9:04 ` Pekka Enberg
2009-04-28 9:10 ` Andi Kleen
2009-04-28 9:15 ` Pekka Enberg
2009-04-28 9:15 ` Ingo Molnar
2009-04-28 9:19 ` Pekka Enberg
2009-04-28 9:25 ` Pekka Enberg
2009-04-28 9:36 ` Wu Fengguang
2009-04-28 9:36 ` Ingo Molnar
2009-04-28 9:57 ` Pekka Enberg
2009-04-28 10:10 ` KOSAKI Motohiro
2009-04-28 10:21 ` Pekka Enberg
2009-04-28 10:56 ` Ingo Molnar
2009-04-28 11:09 ` KOSAKI Motohiro
2009-04-28 12:42 ` Ingo Molnar
2009-04-28 11:03 ` Ingo Molnar
2009-04-28 17:42 ` Matt Mackall
2009-04-28 9:29 ` Ingo Molnar
2009-04-28 9:34 ` KOSAKI Motohiro
2009-04-28 9:38 ` Ingo Molnar
2009-04-28 9:55 ` Wu Fengguang
2009-04-28 10:11 ` KOSAKI Motohiro
2009-04-28 11:05 ` Ingo Molnar
2009-04-28 11:36 ` Wu Fengguang
2009-04-28 12:17 ` [rfc] object collection tracing (was: [PATCH 5/5] proc: export more page flags in /proc/kpageflags) Ingo Molnar
2009-04-28 13:31 ` Wu Fengguang
2009-05-12 13:01 ` Frederic Weisbecker
2009-05-17 13:36 ` Wu Fengguang
2009-05-17 13:55 ` Frederic Weisbecker
2009-05-17 14:12 ` Wu Fengguang
2009-05-18 11:44 ` KOSAKI Motohiro
2009-05-18 11:47 ` Wu Fengguang
2009-04-28 10:18 ` [PATCH 5/5] proc: export more page flags in /proc/kpageflags Andi Kleen
2009-04-28 8:33 ` Wu Fengguang
2009-04-28 9:24 ` Ingo Molnar
2009-04-28 18:11 ` Tony Luck [this message]
2009-04-28 18:34 ` Matt Mackall
2009-04-28 20:47 ` Tony Luck
2009-04-28 20:54 ` Andi Kleen
2009-04-28 20:59 ` Matt Mackall
2009-04-28 21:17 ` Andrew Morton
2009-04-28 21:49 ` Matt Mackall
2009-04-29 0:02 ` Robin Holt
2009-04-28 17:49 ` Matt Mackall
2009-04-29 8:05 ` Wu Fengguang
2009-04-29 19:13 ` Matt Mackall
2009-04-30 1:00 ` Wu Fengguang
2009-04-28 21:32 ` Andrew Morton
2009-04-28 22:46 ` Matt Mackall
2009-04-28 23:02 ` Andrew Morton
2009-04-28 23:31 ` Matt Mackall
2009-04-28 23:42 ` Andrew Morton
2009-04-28 23:55 ` Matt Mackall
2009-04-29 3:33 ` Wu Fengguang
2009-04-29 2:38 ` Wu Fengguang
2009-04-29 2:55 ` Andrew Morton
2009-04-29 3:48 ` Wu Fengguang
2009-04-29 5:09 ` Wu Fengguang
2009-04-29 4:41 ` Nathan Lynch
2009-04-29 4:50 ` Andrew Morton
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