From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: ltt-dev@lists.casi.polymtl.ca
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RELEASE] ltt-control 0.86, better streaming fadvise
Date: Wed, 19 May 2010 22:11:39 -0400 [thread overview]
Message-ID: <20100520021139.GA15828@Krystal> (raw)
In-Reply-To: <20100519220015.GA8028@Krystal>
A discussion follow-up with Linus made me change the implementation to put the
fadvise after the synchronous page writeback, to ensure better streaming
behavior.
Mathieu
* Mathieu Desnoyers (mathieu.desnoyers@efficios.com) wrote:
> Hi,
>
> I just released ltt-control 0.85 which waits for previous subbuffers to be
> written to disk (using sync_file_range()) and uses fadvise to tell the kernel
> that pages won't be reaccessed. This lessens the tracer impact on the page
> cache.
>
> Thanks to Linus for hints on how to use fadvise and sync_file_range to do
> this, c.f.:
>
> http://marc.info/?l=linux-kernel&m=127430576309253&w=2
>
> Mathieu
>
> --
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
prev parent reply other threads:[~2010-05-20 2:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-19 22:00 [RELEASE] ltt-control 0.85, lighter page cache use Mathieu Desnoyers
2010-05-20 2:11 ` Mathieu Desnoyers [this message]
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