Date: Thu, 01 Oct 2009 17:38:31 -0700 From: Rudy <crapsh@monkeybrains.net> To: Jack Vogel <jfvogel@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: em0 watchdog timeouts Message-ID: <4AC54B87.2030604@monkeybrains.net> In-Reply-To: <2a41acea0910011450v41590f3dn112f367f26faed2d@mail.gmail.com> References: <4AB9638B.8040607@monkeybrains.net> <4AC318E2.70306@monkeybrains.net> <4AC3DB8F.7010602@monkeybrains.net> <2a41acea0909301556g1df7dbafv813f5924553c8bfb@mail.gmail.com> <4AC5198E.7030609@monkeybrains.net> <4AC51B4C.7080905@monkeybrains.net> <2a41acea0910011450v41590f3dn112f367f26faed2d@mail.gmail.com>
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> What about system load, perhaps something is bogging the thing down so that > it cannot adequately service the network interrupts?? > Hardly anything is running on the box... Only things on the box: zebra bgpd (3 peers...) sshd snmpd Here is the top of 'top': load averages: 0.06, 0.08, 0.07 up 7+01:08:16 17:26:39 15 processes: 1 running, 14 sleeping CPU: 0.0% user, 0.0% nice, 4.5% system, 0.0% interrupt, 95.5% idle Mem: 193M Active, 42M Inact, 156M Wired, 196K Cache, 83M Buf, 1610M Free > The specs of the motherboard are respectable, how much memory does it have? > > Another thought, are you using the out-of-band management features (like > IPMI)? > If you are not then go into the BIOS and disable that stuff. > No IPMI card added to that motherboard (you have to add a daughter card). > Have you run netstat or some other resource monitor to see if you run out of > anything that might coincide with the watchdogs... What should I look for? # netstat -s 4105/4610/8715 mbufs in use (current/cache/total) 4103/2303/6406/25600 mbuf clusters in use (current/cache/total/max) 4103/2297 mbuf+clusters out of packet secondary zone in use (current/cache) 0/44/44/12800 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 9232K/5934K/15166K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 0/6/6656 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile 0 calls to protocol drain routines Are there specific router-only tunings that may help? Here are my sysctl settings: kern.ipc.somaxconn=256 kern.random.sys.harvest.interrupt=0 kern.random.sys.harvest.ethernet=0 kern.ipc.nmbcluster=32768 net.inet.icmp.icmplim=1000 net.inet.ip.fastforwarding=1 net.inet.ip.intr_queue_maxlen=92 net.inet.icmp.drop_redirect=1 dev.em.0.rx_processing_limit=200 dev.em.1.rx_processing_limit=200 dev.em.2.rx_processing_limit=200 #dev.em.4.rx_processing_limit=200 # test setting processing limit up to 300 dev.em.4.rx_processing_limit=300 dev.em.5.rx_processing_limit=200 Thanks, Rudy
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