From: Andrew Morton <akpm@osdl.org>
To: Jesse Barnes <jbarnes@engr.sgi.com>
Cc: linux-kernel@vger.kernel.org, jeremy@sgi.com
Subject: Re: Buffered I/O slowness
Date: Fri, 29 Oct 2004 17:30:45 -0700 [thread overview]
Message-ID: <20041029173045.32722ac0.akpm@osdl.org> (raw)
In-Reply-To: <200410291716.25277.jbarnes@engr.sgi.com>
Jesse Barnes <jbarnes@engr.sgi.com> wrote:
>
> > I'm not sure that we know what's going on yet. I certainly don't. The
> > above numbers look good, so what's the problem???
>
> The numbers are ~1/3 of what the machine is capable of with direct I/O.
Are there CPU cycles to spare? If you have just one CPU copying 1GB/sec
out of pagecache, maybe it is pegged?
next prev parent reply other threads:[~2004-10-30 0:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-26 1:14 Buffered write slowness Jesse Barnes
2004-10-29 17:46 ` Buffered I/O slowness Jesse Barnes
2004-10-29 23:08 ` Andrew Morton
2004-10-30 0:16 ` Jesse Barnes
2004-10-30 0:30 ` Andrew Morton [this message]
2004-11-01 18:26 ` Jesse Barnes
2004-11-01 18:34 ` Jesse Barnes
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