From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Jakob Oestergaard <jakob@unthought.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: NFS client (10x) performance regression 2.6.14.7 -> 2.6.15
Date: Fri, 31 Mar 2006 08:06:32 -0500 [thread overview]
Message-ID: <1143810392.8096.11.camel@lade.trondhjem.org> (raw)
In-Reply-To: <20060331124518.GH9811@unthought.net>
On Fri, 2006-03-31 at 14:45 +0200, Jakob Oestergaard wrote:
> On Fri, Mar 31, 2006 at 07:22:50AM -0500, Trond Myklebust wrote:
> ...
> >
> > Some nfsstat output comparing the good and bad cases would help.
>
> Clean boot on 2.6.15 and 2.6.14.7, one run of nfsbench with
> LEADING_EMPTY_SPACE=1. I've skipped the NFS v2 stats because they're
> all 0.
Why all the GETATTR calls? Are you running with 'noac' set?
I don't have a 2.6.15 kernel to run with, but on a recent git pull, I
get a total of 6 GETATTR calls when I run your nfsbench program.
The number of READ calls is 1, and the number of WRITE calls is 161 (I'm
running with 64k wsize).
Cheers,
Trond
> --- Run on bad kernel ---
>
> [puffin:joe] $ uname -a
> Linux puffin 2.6.15 #1 SMP Fri Mar 31 11:10:28 CEST 2006 i686 GNU/Linux
> [puffin:joe] $ nfsstat
> Client rpc stats:
> calls retrans authrefrsh
> 63 0 0
>
> <snip v2 stats>
>
> Client nfs v3:
> null getattr setattr lookup access readlink
> 0 0% 11 18% 0 0% 26 42% 14 22% 0 0%
> read write create mkdir symlink mknod
> 4 6% 0 0% 0 0% 0 0% 0 0% 0 0%
> remove rmdir rename link readdir readdirplus
> 0 0% 0 0% 0 0% 0 0% 0 0% 4 6%
> fsstat fsinfo pathconf commit
> 0 0% 2 3% 0 0% 0 0%
> [puffin:joe] $ time ./nfsbench
>
> real 0m29.242s
> user 0m0.000s
> sys 0m0.160s
> [puffin:joe] $ nfsstat
> Client rpc stats:
> calls retrans authrefrsh
> 13240 0 0
>
> <snip v2 stats>
>
> Client nfs v3:
> null getattr setattr lookup access readlink
> 0 0% 2583 19% 0 0% 30 0% 24 0% 0 0%
> read write create mkdir symlink mknod
> 7045 53% 3200 24% 1 0% 0 0% 0 0% 0 0%
> remove rmdir rename link readdir readdirplus
> 0 0% 0 0% 0 0% 0 0% 0 0% 34 0%
> fsstat fsinfo pathconf commit
> 0 0% 2 0% 0 0% 319 2%
>
> [puffin:joe] $
>
> --- Run on good kernel ---
>
> [puffin:joe] $ uname -a
> Linux puffin 2.6.14.7 #1 SMP Fri Mar 31 10:41:59 CEST 2006 i686
> GNU/Linux
> [puffin:joe] $ nfsstat
> Client rpc stats:
> calls retrans authrefrsh
> 52 0 0
>
> <snip v2 stats>
>
> Client nfs v3:
> null getattr setattr lookup access readlink
> 0 0% 7 14% 0 0% 24 48% 13 26% 0 0%
> read write create mkdir symlink mknod
> 4 8% 0 0% 0 0% 0 0% 0 0% 0 0%
> remove rmdir rename link readdir readdirplus
> 0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
> fsstat fsinfo pathconf commit
> 0 0% 2 4% 0 0% 0 0%
>
> [puffin:joe] $ time ./nfsbench
>
> real 0m0.224s
> user 0m0.000s
> sys 0m0.072s
> [puffin:joe] $ nfsstat
> Client rpc stats:
> calls retrans authrefrsh
> 384 0 0
>
> <snip v2 stats>
>
> Client nfs v3:
> null getattr setattr lookup access readlink
> 0 0% 10 2% 1 0% 26 6% 15 3% 0 0%
> read write create mkdir symlink mknod
> 6 1% 321 84% 0 0% 0 0% 0 0% 0 0%
> remove rmdir rename link readdir readdirplus
> 0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
> fsstat fsinfo pathconf commit
> 0 0% 2 0% 0 0% 1 0%
>
> [puffin:joe] $
>
>
next prev parent reply other threads:[~2006-03-31 13:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-31 9:48 Jakob Oestergaard
2006-03-31 11:22 ` NFS client regression, simple test program Jakob Oestergaard
2006-03-31 12:22 ` NFS client (10x) performance regression 2.6.14.7 -> 2.6.15 Trond Myklebust
2006-03-31 12:45 ` Jakob Oestergaard
2006-03-31 13:06 ` Trond Myklebust [this message]
2006-03-31 13:21 ` Jakob Oestergaard
2006-03-31 13:44 ` Trond Myklebust
2006-03-31 14:08 ` Jakob Oestergaard
2006-03-31 14:21 ` Trond Myklebust
2006-03-31 14:35 ` Jakob Oestergaard
2006-03-31 14:49 ` Bill Rugolsky Jr.
2006-03-31 14:57 ` Jakob Oestergaard
2006-03-31 15:04 ` Bill Rugolsky Jr.
2006-03-31 15:24 ` Jakob Oestergaard
2006-03-31 16:35 ` Bill Rugolsky Jr.
2006-03-31 18:52 ` Jakob Oestergaard
2006-03-31 15:55 ` Trond Myklebust
2006-03-31 16:04 ` Jakob Oestergaard
2006-04-03 15:26 ` Jakob Oestergaard
2006-04-03 15:41 ` Trond Myklebust
2006-04-03 15:45 ` Jakob Oestergaard
2006-04-04 9:22 ` Jakob Oestergaard
2006-04-24 22:03 ` Trond Myklebust
2006-04-25 8:08 ` Jakob Oestergaard
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