From: Eric Dumazet <dada1@cosmosbay.com>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org, balbir@in.ibm.com,
csturtiv@sgi.com, daw@sgi.com, guillaume.thouvenin@bull.net,
jlan@sgi.com, nagar@watson.ibm.com, tee@sgi.com
Subject: Re: [patch 01/13] io-accounting: core statistics
Date: Fri, 08 Dec 2006 13:04:15 +0100 [thread overview]
Message-ID: <457954BF.7040707@cosmosbay.com> (raw)
In-Reply-To: <200612081152.kB8BqOkh019750@shell0.pdx.osdl.net>
akpm@osdl.org a écrit :
> From: Andrew Morton <akpm@osdl.org>
>
> The present per-task IO accounting isn't very useful. It simply counts the
> number of bytes passed into read() and write(). So if a process reads 1MB
> from an already-cached file, it is accused of having performed 1MB of I/O,
> which is wrong.
Any chance we can report some io accounting values in getresource()/wait4()...
too ?
# /usr/bin/time find /usr -name 'foo'
0.24user 0.22system 0:00.70elapsed 66%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+222minor)pagefaults 0swaps
next prev parent reply other threads:[~2006-12-08 12:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 11:52 [patch 01/13] io-accounting: core statistics akpm
2006-12-08 12:04 ` Eric Dumazet [this message]
2006-12-08 19:47 ` Andrew Morton
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