Date: Mon, 05 May 2008 23:14:32 +0300 From: Oleksandr Samoylyk <oleksandr@samoylyk.sumy.ua> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with em on FreeBSD 7 Message-ID: <481F6AA8.60002@samoylyk.sumy.ua> In-Reply-To: <481EEE34.7060804@samoylyk.sumy.ua> References: <481C84B7.6020205@samoylyk.sumy.ua> <bibs14perk47snkpg8fu691kjkc42gh6m2@4ax.com> <481E338D.6040706@samoylyk.sumy.ua> <2a41acea0805041529j5d4dd2f7x5e07a8d6d2eb89b6@mail.gmail.com> <2a41acea0805041532le60cc9cybf22887e9fdcb3f9@mail.gmail.com> <481EEE34.7060804@samoylyk.sumy.ua>
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Oleksandr Samoylyk wrote:
> Jack Vogel wrote:
>> Oh, I just had a thought, increase the RX processing limit,
>> that only allows you to process 100 packets in one pass.
>>
>> First change it to 250 and see what it does, you might
>> also set it to -1 which will allow you to process til you
>> drain the ring, the risk is that you cause other problems
>> by doing that, but heck at this point anything is worth
>> trying, right?
>>
>
> Nothing has helped. :(
>
> I need to unplug and plug in again patch cords each time when my CPUs
> with emX go 100% in order to keep my server alive with a descent pings.
>
> I mentioned that "100%: emX taskq" occurs only on that interfaces where
> GRE packets are being processed.
>
> External interface to Internet feels great. Pings are <0ms and load is
> 9.57% with 14kpps (input/output).
>
> Maybe interesting:
> According to kgmon:
> % cumulative self self total
> time seconds seconds calls ms/call ms/call name
> 39.9 93.10 93.10 1643247 0.06 0.07 rip_input [10]
>
> Is it em related or mpd related or something else?
>
> Back to releng_6? Not sure though. :(
>
Now I'm on 6.3-STABLE:
last pid: 31566; load averages: 7.61, 7.25, 7.07
up 0+01:34:00 22:30:05
82 processes: 10 running, 58 sleeping, 14 waiting
CPU states: 0.2% user, 0.0% nice, 52.1% system, 47.8% interrupt, 0.0%
idle
Mem: 63M Active, 10M Inact, 152M Wired, 8K Cache, 35M Buf, 1752M Free
Swap: 4011M Total, 4011M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
12 root 1 -44 -163 0K 8K WAIT 0 42:43 93.60% swi1: net
24 root 1 43 0 0K 8K CPU0 0 29:50 48.34%
em0_rx_kthread_1
23 root 1 43 0 0K 8K RUN 0 29:50 46.78%
em0_rx_kthread_0
28 root 1 43 0 0K 8K RORDER 1 3:30 2.25%
em1_rx_kthread_0
29 root 1 43 0 0K 8K RUN 0 3:30 2.15%
em1_rx_kthread_1
10 root 1 171 52 0K 8K RUN 1 11:22 0.00% idle:
cpu1
11 root 1 171 52 0K 8K RUN 0 9:01 0.00% idle:
cpu0
The results aren't good as well.
--
Oleksandr Samoylyk
OVS-RIPE
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