From: Wu Fengguang <wfg@mail.ustc.edu.cn>
To: Greg Banks <gnb@sgi.com>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
Neil Brown <neilb@cse.unsw.edu.au>
Subject: Re: [PATCH 11/12] readahead: nfsd support
Date: Sat, 17 Dec 2005 21:35:18 +0800 [thread overview]
Message-ID: <20051217133518.GA5444@mail.ustc.edu.cn> (raw)
In-Reply-To: <20051217000522.GB30278@sgi.com>
On Sat, Dec 17, 2005 at 11:05:22AM +1100, Greg Banks wrote:
> On Fri, Dec 16, 2005 at 09:07:49PM +0800, Wu Fengguang wrote:
> > ------------------------------------------------------------------------
> > Here is some test output(8 nfsd; local mount with tcp,rsize=8192):
>
> What are the numbers when you use a more realistic rsize like 32768?
Here they are. The normal data are now much better, and come close to that of
the serialized ones.
NORMAL
readahead_ratio = 8, ra_max = 1024kb (old logic)
48.36s real 2.22s system 1.51s user 7209+4110 cs diff $NFSFILE $NFSFILE2
readahead_ratio = 70, ra_max = 1024kb (new logic)
30.04s real 2.46s system 1.33s user 5420+2492 cs diff $NFSFILE $NFSFILE2
readahead_ratio = 8, ra_max = 1024kb
92.99s real 10.32s system 3.23s user 145004+1826 cs diff -r $NFSDIR $NFSDIR2 > /dev/null
readahead_ratio = 70, ra_max = 1024kb
90.96s real 10.68s system 3.22s user 144414+2520 cs diff -r $NFSDIR $NFSDIR2 > /dev/null
SERIALIZED
readahead_ratio = 8, ra_max = 1024kb
47.58s real 2.10s system 1.27s user 7933+1357 cs diff $NFSFILE $NFSFILE2
readahead_ratio = 70, ra_max = 1024kb
29.46s real 2.41s system 1.38s user 5590+2613 cs diff $NFSFILE $NFSFILE2
readahead_ratio = 8, ra_max = 1024kb
93.02s real 10.67s system 3.25s user 144850+2286 cs diff -r $NFSDIR $NFSDIR2 > /dev/null
readahead_ratio = 70, ra_max = 1024kb
91.15s real 11.04s system 3.31s user 144432+2814 cs diff -r $NFSDIR $NFSDIR2 > /dev/null
Regards,
Wu
next prev parent reply other threads:[~2005-12-17 13:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-16 13:07 [PATCH 00/12] Adaptive read-ahead V10 Wu Fengguang
2005-12-16 13:07 ` [PATCH 01/12] radixtree: look-aside cache Wu Fengguang
2005-12-16 13:07 ` [PATCH 02/12] readahead: some preparation Wu Fengguang
2005-12-16 13:07 ` [PATCH 03/12] readahead: call scheme Wu Fengguang
2005-12-16 13:07 ` [PATCH 04/12] readahead: parameters Wu Fengguang
2005-12-16 13:07 ` [PATCH 05/12] readahead: state based method Wu Fengguang
2005-12-16 13:07 ` [PATCH 06/12] readahead: context " Wu Fengguang
2005-12-16 13:07 ` [PATCH 07/12] readahead: other methods Wu Fengguang
2005-12-16 13:07 ` [PATCH 08/12] readahead: events accounting Wu Fengguang
2005-12-16 13:07 ` [PATCH 09/12] readahead: laptop mode support Wu Fengguang
2005-12-16 13:07 ` [PATCH 10/12] readahead: disable look-ahead for loopback file Wu Fengguang
2005-12-16 13:07 ` [PATCH 11/12] readahead: nfsd support Wu Fengguang
2005-12-17 0:05 ` Greg Banks
2005-12-17 13:35 ` Wu Fengguang [this message]
2005-12-16 13:07 ` [PATCH 12/12] readahead: improve interactivity Wu Fengguang
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