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Date: Thu, 16 Aug 2012 16:52:53 +0200
From: Jan Kara <jack@suse.cz>
To: Mel Gorman <mgorman@suse.de>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
Subject: Re: [MMTests] dbench4 async on ext3
Message-ID: <20120816145253.GB9057@quack.suse.cz>
References: <20120620113252.GE4011@suse.de>
 <20120629111932.GA14154@suse.de>
 <20120723212146.GG9222@suse.de>
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On Mon 23-07-12 22:21:46, Mel Gorman wrote:
> Configuration:	global-dhp__io-dbench4-async-ext3
> Result: 	http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext3
> Benchmarks:	dbench4
> 
> Summary
> =======
> 
> In general there was a massive drop in throughput after 3.0. Very broadly
> speaking it looks like the Read operation got faster but at the cost of
> a big regression in the Flush operation.
  This looks bad. Also quickly looking into changelogs I don't see any
change which could cause this. I'll try to reproduce this and track it
down.

								Honza
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Kara <jack@suse.cz>
Subject: Re: [MMTests] dbench4 async on ext3
Date: Thu, 16 Aug 2012 16:52:53 +0200
Message-ID: <20120816145253.GB9057@quack.suse.cz>
References: <20120620113252.GE4011@suse.de>
 <20120629111932.GA14154@suse.de>
 <20120723212146.GG9222@suse.de>
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Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org
To: Mel Gorman <mgorman@suse.de>
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On Mon 23-07-12 22:21:46, Mel Gorman wrote:
> Configuration:	global-dhp__io-dbench4-async-ext3
> Result: 	http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext3
> Benchmarks:	dbench4
> 
> Summary
> =======
> 
> In general there was a massive drop in throughput after 3.0. Very broadly
> speaking it looks like the Read operation got faster but at the cost of
> a big regression in the Flush operation.
  This looks bad. Also quickly looking into changelogs I don't see any
change which could cause this. I'll try to reproduce this and track it
down.

								Honza
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

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