Date: Wed, 07 May 2008 12:41:43 -0700 From: Julian Elischer <julian@elischer.org> To: Oleksandr Samoylyk <oleksandr@samoylyk.sumy.ua> Cc: freebsd-net@freebsd.org Subject: Re: Problems with netgraph Message-ID: <482205F7.4010503@elischer.org> In-Reply-To: <4821F206.10606@samoylyk.sumy.ua> References: <48207C8B.4020509@samoylyk.sumy.ua> <48209BC4.5080602@elischer.org> <20080507040727.GA28983@verio.net> <48215706.8080508@samoylyk.sumy.ua> <4821EF57.9010600@elischer.org> <4821F206.10606@samoylyk.sumy.ua>
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Oleksandr Samoylyk wrote: > Julian Elischer wrote: >> Oleksandr Samoylyk wrote: >>> David DeSimone wrote: >>>> Julian Elischer <julian@elischer.org> wrote: >>>>> unfortunatly I've been totally ignoring this thread because it said >>>>> "trouble with em" in the topic.. >>>>> If you'd said "trouble with mpd" then maybe I'd have looked earlier.. >>>> >>>> In the poster's defense, the only symptom that started this was this >>>> info from ps: >>>> >>>> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU >>>> COMMAND >>>> 29 root 1 -68 - 0K 16K CPU5 5 196:41 100.00% >>>> em0 taskq >>>> >>>> So tracking it down to mpd has been a process of elimination in >>>> figuring >>>> out why packets absorb so much CPU. >>>> >>> >>> Here is a result of profiling: >>> >>> http://lists.freebsd.org/pipermail/freebsd-net/2008-May/017901.html >>> >> >> >> 0.00 0.00 16/1643247 igmp_input [833] >> 0.03 0.01 614/1643247 icmp_input [272] >> 93.07 17.27 1642617/1643247 encap4_input [9] >> [10] 49.8 93.10 17.27 1643247 rip_input [10] >> 14.26 0.88 600796/749987 _mtx_lock_sleep >> [21] >> 0.16 1.70 1643863/1643863 raw_append [93] >> 0.00 0.24 36345/176995 _mtx_unlock_sleep >> [114] >> 0.01 0.00 1643863/5117962 jailed [278] >> 0.00 0.00 1292/1843 m_copym [666] >> 0.00 0.00 676/8214484 m_freem [34] >> >> >> >> 50% of time in rip_input??? >> >> that's unexpected.. what is the traffic? > > > more than 20k pps I mean, what KIND of traffic? I'm surprised it 's calling rip_input().. why is it calling encap4_input()? (which calls rip_input).. what is the IP protocol of all these packets? what does a small snippet of traffic show? (tcpdump -i em0 -s0 -e -n -c 64) > >> I see no netgraph in the profile at all. >> did you statically compile it all in at compile time? (you should if >> you want to see it) >> > > Tried both variants. Now not statically. make sure it is static and that the netgraph nodes are all compiled with -pg >
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