----- Original Message -----
From: "Gerrit Kühn" <gerrit.ku...@aei.mpg.de>
To: "Steven Hartland" <kill...@multiplay.co.uk>
Cc: <freebsd-net@freebsd.org>
Sent: Friday, April 25, 2014 4:52 PM
Subject: Re: NFS over LAGG / lacp poor performance
On Fri, 25 Apr 2014 15:55:29 +0100 "Steven Hartland"
<kill...@multiplay.co.uk> wrote about Re: NFS over LAGG / lacp poor
performance:
SH> Run top then enable system processes (shift+S) and threads (shift+H)
SH> then disable idle process display (z) if your seeing significant CPU
SH> usage to the igb interrupt handlers try reducing the number.
Hm, I'm a bit unsure what I see here:
---
last pid: 71026; load averages: 0.36, 0.37, 0.27
up 18+03:14:21 17:48:02
295 processes: 5 running, 259 sleeping, 31 waiting
CPU: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
Mem: 3596K Active, 59M Inact, 11G Wired, 900K Cache, 1236M Buf, 1019M Free
Swap: 16G Total, 14M Used, 16G Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
0 root -16 0 0K 2672K - 2 272:01 0.00%
kernel{zio_write_issue_}
0 root -16 0 0K 2672K - 0 271:55 0.00%
kernel{zio_write_issue_}
0 root -16 0 0K 2672K - 3 271:54 0.00%
kernel{zio_write_issue_}
0 root -16 0 0K 2672K - 1 271:52 0.00%
kernel{zio_write_issue_}
1455 root 20 0 9912K 472K rpcsvc 2 173:53 0.00% nfsd{nfsd:
master}
1455 root 20 0 9912K 472K rpcsvc 0 166:37 0.00% nfsd{nfsd:
service}
1455 root 20 0 9912K 472K rpcsvc 0 164:25 0.00% nfsd{nfsd:
service}
1455 root 20 0 9912K 472K rpcsvc 3 163:06 0.00% nfsd{nfsd:
service}
12 root -92 - 0K 496K WAIT 1 155:36 0.00% intr{irq262:
igb1:que}
[...]
---
The irq-igb1 clibs to top every now and then (always less than 1% cpu
usage though), but there is never much cpu usage shown for any task.
However, the overall load is significant. What might the system be doing?
Thats not your issue then.
Regards
Steve
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