From: Ingo Molnar <mingo@elte.hu>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: "Frédéric Weisbecker" <fweisbec@gmail.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Peter Zijlstra" <a.p.zijlstra@chello.nl>,
"Li Zefan" <lizf@cn.fujitsu.com>,
"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] tracing/mm: add page frame snapshot trace
Date: Sat, 9 May 2009 12:01:37 +0200 [thread overview]
Message-ID: <20090509100137.GC20941@elte.hu> (raw)
In-Reply-To: <20090509091325.GA7994@localhost>
* Wu Fengguang <fengguang.wu@intel.com> wrote:
> 2) support concurrent object iterations
> For example, a huge 1TB memory space can be split up into 10
> segments which can be queried concurrently (with different options).
this should already be possible. If you lseek the trigger file, that
will be understood as an 'offset' by the patch, and then write a
(decimal) value into the file, that will be the count.
So it should already be possible to fork off nr_cpus helper threads,
one bound to each CPU, each triggering trace output of a separate
segment of the memory map - and each reading that CPU's
trace_pipe_raw file to recover the data - all in parallel.
Ingo
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next prev parent reply other threads:[~2009-05-09 10:01 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 10:53 [PATCH 0/8] export more page flags in /proc/kpageflags (take 6) Wu Fengguang
2009-05-08 10:53 ` [PATCH 1/8] mm: introduce PageHuge() for testing huge/gigantic pages Wu Fengguang
2009-05-08 11:40 ` Ingo Molnar
2009-05-08 12:21 ` Wu Fengguang
2009-05-13 17:05 ` Mel Gorman
2009-05-17 13:09 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 2/8] slob: use PG_slab for identifying SLOB pages Wu Fengguang
2009-05-08 10:53 ` [PATCH 3/8] proc: kpagecount/kpageflags code cleanup Wu Fengguang
2009-05-08 10:53 ` [PATCH 4/8] proc: export more page flags in /proc/kpageflags Wu Fengguang
2009-05-08 11:47 ` Ingo Molnar
2009-05-08 12:44 ` Wu Fengguang
2009-05-09 5:59 ` Ingo Molnar
2009-05-09 7:56 ` Wu Fengguang
2009-05-09 6:27 ` [patch] tracing/mm: add page frame snapshot trace Ingo Molnar
2009-05-09 9:13 ` Wu Fengguang
2009-05-09 9:24 ` Ingo Molnar
2009-05-09 9:43 ` Wu Fengguang
2009-05-09 10:22 ` Ingo Molnar
2009-05-09 10:45 ` Wu Fengguang
2009-05-09 10:01 ` Ingo Molnar [this message]
2009-05-09 10:27 ` Ingo Molnar
2009-05-09 10:57 ` Wu Fengguang
2009-05-09 11:05 ` Ingo Molnar
2009-05-09 12:23 ` Wu Fengguang
2009-05-09 14:05 ` Ingo Molnar
2009-05-10 8:35 ` Wu Fengguang
2009-05-11 12:01 ` Ingo Molnar
2009-05-09 10:36 ` Ingo Molnar
2009-05-08 12:58 ` ftrace: concurrent accesses possible? Wu Fengguang
2009-05-08 13:17 ` Steven Rostedt
2009-05-08 13:43 ` Wu Fengguang
2009-05-08 20:24 ` [PATCH 4/8] proc: export more page flags in /proc/kpageflags Andrew Morton
2009-05-09 10:44 ` Ingo Molnar
2009-05-10 3:58 ` Andrew Morton
2009-05-10 5:26 ` Andrew Morton
2009-05-11 11:45 ` Ingo Molnar
2009-05-11 18:31 ` Andrew Morton
2009-05-11 22:08 ` Ingo Molnar
2009-05-11 19:03 ` Andy Isaacson
2009-05-08 10:53 ` [PATCH 5/8] pagemap: document clarifications Wu Fengguang
2009-05-08 10:53 ` [PATCH 6/8] pagemap: document 9 more exported page flags Wu Fengguang
2009-05-09 8:13 ` KOSAKI Motohiro
2009-05-09 8:18 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 7/8] pagemap: add page-types tool Wu Fengguang
2009-05-08 10:53 ` [PATCH 8/8] pagemap: export PG_hwpoison Wu Fengguang
2009-05-08 11:49 ` Ingo Molnar
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