2014-10-25 19:19:51

by Mkrtchyan, Tigran

Subject: lua extention for wireshak to trace nfs server latencies

Dear NFS fellows,

recently I was debugging some NFS related issues and
needed a tool to trace situations when NFS server is slow.

I created a lua extension for tshark which allows to get
such information, but still has the full power of tshark.

example usage:


# for life capture
$ tshark -q -X lua_script:nfs.lua -f "port 2049"

# for a capture file
$ tshark -q -r nfs.dump -X lua_script:nfs.lua

the output looks like:

timestamp client ip server ip time OP

"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.001 v4_EXCHANGE_ID
"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.001 v4_CREATE_SESSION
"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.001 v4_PUTROOTFH
"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.002 v4_RECLAIM_COMPLETE
"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.001 v4_PUTROOTFH
"Aug 27, 2014 16:44:43.000 CEST" aaaa:bbbb:ccc:10a0::1:7f <=> aaaa:bbbb:ccc:10bf::1:8c 0.001 v4_DESTROY_SESSION
"Aug 27, 2014 16:44:43.000 CEST" a.b.161.127 <=> a.b.191.140 0.001 v4_EXCHANGE_ID
"Aug 27, 2014 16:44:43.000 CEST" a.b.161.127 <=> a.b.191.140 0.001 v4_CREATE_SESSION
"Aug 27, 2014 16:44:43.000 CEST" a.b.161.127 <=> a.b.191.140 0.003 v4_PUTROOTFH
"Aug 27, 2014 16:44:43.000 CEST" a.b.161.127 <=> a.b.191.140 0.002 v4_RECLAIM_COMPLETE
"Aug 27, 2014 16:44:43.000 CEST" a.b.161.127 <=> a.b.191.140 0.004 v4_PUTROOTFH


May be some one need's it as well: https://github.com/kofemann/wireshark_lua


P.S.: is it the right place for such posts or there yet another mailing list or wiki?

Thanks,
Tigran.

2014-10-29 14:47:44

by J. Bruce Fields

Subject: Re: lua extention for wireshak to trace nfs server latencies

On Sat, Oct 25, 2014 at 09:13:33PM +0200, Mkrtchyan, Tigran wrote:
> recently I was debugging some NFS related issues and
> needed a tool to trace situations when NFS server is slow.
>
> I created a lua extension for tshark which allows to get
> such information, but still has the full power of tshark.
...
> May be some one need's it as well: https://github.com/kofemann/wireshark_lua
>
>
> P.S.: is it the right place for such posts or there yet another mailing list or wiki?

I guess I'd be inclined to cross-post such things to [email protected]. I
don't know how else to reach implementors across OS's.

You're welcome to add things to wiki.linux-nfs.org too.

--b.