Messages in this thread | | | Date | Fri, 31 Mar 2006 14:45:19 +0200 | From | Jakob Oestergaard <> | Subject | Re: NFS client (10x) performance regression 2.6.14.7 -> 2.6.15 |
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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.
--- 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] $
--
/ jakob
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