On Fri, 25 Apr 2014 15:55:29 +0100 "Steven Hartland"
<[email protected]> 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?
cu
Gerrit
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