From: Andrea Arcangeli <aarcange@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>, Johannes Weiner <jweiner@redhat.com>,
linux-mm@kvack.org
Subject: Re: [PATCH] remove compaction from kswapd
Date: Tue, 1 Mar 2011 23:39:54 +0100 [thread overview]
Message-ID: <20110301223954.GI19057@random.random> (raw)
In-Reply-To: <AANLkTingkWo6dx=0sGdmz9qNp+_TrQnKXnmASwD8LhV4@mail.gmail.com>
On Wed, Mar 02, 2011 at 07:33:13AM +0900, Minchan Kim wrote:
> Sorry for bothering you but I think you get the data.
> It helps someone in future very much to know why we determined to
> remove the feature at that time and they should do what kinds of
> experiment to prove it has a benefit to add compaction in kswapd
> again.
This is a benchmark I'm unsure if it's ok to publish results but it
should be possible to simulate it with a device driver.
Arthur provided kswapd load usage data too, so I hope that's enough.
My other patch (compaction-kswapd-3) is way better than current logic
and retains compaction in kswapd. That shows slightly higher
kswapd utilization with Arthur's multimedia workload, and a bit worse
performance on the network benchmark. So I thought it was better to go
with the fastest potion as long as we don't have a logic that uses
compaction and shows improved performance and lower latency than with
no compaction at all in kswapd.
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next prev parent reply other threads:[~2011-03-01 22:40 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-28 22:21 [PATCH] remove compaction from kswapd Andrea Arcangeli
2011-03-01 22:33 ` Minchan Kim
2011-03-01 22:39 ` Andrea Arcangeli [this message]
2011-03-01 23:10 ` Minchan Kim
2011-03-02 0:41 ` Andrew Morton
2011-03-02 4:38 ` Andrea Arcangeli
2011-03-02 4:39 ` Andrea Arcangeli
2011-03-02 4:53 ` Andrew Morton
2011-03-02 5:52 ` Andrea Arcangeli
2011-03-02 5:57 ` Andrew Morton
2011-03-02 17:21 ` Andrea Arcangeli
2011-03-02 14:25 ` Mel Gorman
2011-03-09 22:17 ` Andrew Morton
2011-03-09 23:50 ` Andrea Arcangeli
2011-03-10 10:11 ` Mel Gorman
2011-03-09 17:00 ` Andrea Arcangeli
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