From: Jens Axboe <axboe@suse.de>
To: Giuliano Pochini <pochini@shiny.it>
Cc: linux kernel mailing list <linux-kernel@vger.kernel.org>,
Con Kolivas <conman@kolivas.net>, Andrew Morton <akpm@digeo.com>
Subject: Re: [BENCHMARK] 2.5.47{-mm1} with contest
Date: Tue, 12 Nov 2002 10:20:45 +0100 [thread overview]
Message-ID: <20021112092045.GB832@suse.de> (raw)
In-Reply-To: <XFMail.20021112095219.pochini@shiny.it>
On Tue, Nov 12 2002, Giuliano Pochini wrote:
>
> On 12-Nov-2002 Andrew Morton wrote:
> > Con Kolivas wrote:
> >>
> >> io_load:
> >> Kernel [runs] Time CPU% Loads LCPU% Ratio
> >> 2.4.18 [3] 474.1 15 36 10 6.64
> >> 2.4.19 [3] 492.6 14 38 10 6.90
> >> 2.5.46 [1] 600.5 13 48 12 8.41
> >> 2.5.46-mm1 [5] 134.3 58 6 8 1.88
> >> 2.5.47 [3] 165.9 46 9 9 2.32
> >> 2.5.47-mm1 [5] 126.3 61 5 8 1.77
> >>
> >
> > We've increased the kernel build speed by 3.6x while decreasing the
> > speed at which writes are retired by 5.3x.
>
> Did the elevator change between .46 and .47 ?
No, but the fifo_batch count (which controls how many requests are moved
sort list to dispatch queue) was halved. This gives lower latency, at
the possible cost of dimishing throughput.
--
Jens Axboe
next prev parent reply other threads:[~2002-11-12 9:14 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-11 23:31 [BENCHMARK] 2.5.47{-mm1} with contest Con Kolivas
2002-11-12 0:09 ` Andrew Morton
2002-11-12 1:51 ` Con Kolivas
2002-11-12 2:07 ` mark walters
2002-11-12 2:18 ` Con Kolivas
2002-11-12 8:52 ` Giuliano Pochini
2002-11-12 9:20 ` Jens Axboe [this message]
2002-11-12 9:40 ` Con Kolivas
2002-11-12 3:04 ` Aaron Lehmann
2002-11-12 11:04 ` Andrew Morton
2002-11-12 14:20 ` Aaron Lehmann
2002-11-12 14:23 ` Jens Axboe
2002-11-12 20:37 ` Bill Davidsen
2002-11-12 20:59 ` Andrew Morton
2002-11-20 23:02 ` Andrew Morton
2002-11-21 0:08 ` William Lee Irwin III
2002-11-21 1:11 ` Alan Cox
2002-11-21 6:54 ` Andrew Morton
2002-11-21 13:20 ` Dave Jones
2002-11-21 17:21 ` Andrew Morton
2002-11-21 17:26 ` William Lee Irwin III
2002-11-21 18:18 ` Dave Jones
2002-11-21 18:25 ` Bill Davidsen
2002-11-21 14:00 ` Dave Jones
2002-11-21 19:59 ` Denis Vlasenko
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