Date: Fri, 25 Apr 2014 17:00:59 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: =?iso-8859-1?Q?Gerrit_K=FChn?= <gerrit.kuehn@aei.mpg.de> Cc: freebsd-net@freebsd.org Subject: Re: NFS over LAGG / lacp poor performance Message-ID: <D809C4CE2C1A4EC5B5A7B7C648D1B1B7@multiplay.co.uk> References: <535A1354.2040309@wp.pl> <20140425113711.e7c7d1c2.gerrit.kuehn@aei.mpg.de> <535A482E.1030106@wp.pl> <20140425140123.a76c18f9.gerrit.kuehn@aei.mpg.de> <535A5268.100@wp.pl> <8247FE6336414E1F97ADA561D0680097@multiplay.co.uk> <535A5DD9.9060206@wp.pl> <AC1233D368D94519BB59B484D6F385C0@multiplay.co.uk> <535A69CE.9010800@wp.pl> <4E7A280CACC84910A3DE068085976E30@multiplay.co.uk> <20140425161312.3ad95e3a.gerrit.kuehn@aei.mpg.de> <1BD2C00D4F0D405C939C975246D41C60@multiplay.co.uk> <20140425163433.e35e5de3.gerrit.kuehn@aei.mpg.de> <006183CE786F4EAC9435B797E5F271CF@multiplay.co.uk> <20140425175231.9714afc3.gerrit.kuehn@aei.mpg.de>
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----- Original Message -----
From: "Gerrit Kühn" <gerrit.kuehn@aei.mpg.de>
To: "Steven Hartland" <killing@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"
> <killing@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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