Date: Sat, 24 Jan 2009 16:20:06 +0000 From: Rui Paulo <rpaulo@freebsd.org> To: Yony Yossef <yonyossef.lists@gmail.com> Cc: johan@nocrew.org, freebsd-net@freebsd.org, Eitan Shefi <eitans@mellanox.co.il>, Amit Krig <amitk@mellanox.co.il>, Liran Liss <liranl@mellanox.co.il> Subject: Re: freebsd 7.0-RELEASE BUG ping: sendto: No buffer space available Message-ID: <EDD4152E-8BE7-40C3-A153-21A110152BE8@freebsd.org> In-Reply-To: <000001c97e23$0d81df20$39ed1aac@mtl.com> References: <000001c97e23$0d81df20$39ed1aac@mtl.com>
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On 24 Jan 2009, at 12:54, Yony Yossef wrote: > Hi All, > > I'm facing a temporary network hang on my interfaces following a flood > ping/stress udp test. > > I'm running a netperf UDP test which is giving results but does not > return > to the shell. > client output: > > UDP UNIDIRECTIONAL SEND TEST from fe80::202:c9ff:fe02:e1fe%mtnic0 > (fe80::202:c9ff:fe02:e1fe) port 0 AF_INET6 to > fe80::202:c9ff:fe02:e1f4%mt > nic0 (fe80::202:c9ff:fe02:e1f4) port 0 AF_INET6 > Socket Message Elapsed Messages > Size Size Time Okay Errors Throughput > bytes bytes secs # # 10^6bits/sec > > 32768 1472 10.02 547428 1694280 643.60 > 32768 10.02 25089 29.50 > > > (HANG) > > After a minute or two it returns to the shell with the following > message: > shutdown_control: no response received errno 55 > > 20 minutes later (!!) the interface is working again. > > netstat -m and vmstat -z outputs during the hang time: > > # netstat -m > 25687/6578/32265 mbufs in use (current/cache/total) > 17404/2438/19842/65536 mbuf clusters in use (current/cache/total/max) > 0/1024 mbuf+clusters out of packet secondary zone in use (current/ > cache) > 2071/1369/3440/65536 4k (page size) jumbo clusters in use > (current/cache/total/max) > 0/0/0/65536 9k jumbo clusters in use (current/cache/total/max) > 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) > 49513K/11996K/61510K 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) > 0/0/0 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 I think there are too many mbufs in use. You're probably facing an mbuf leakage and that causes an interface hang. -- Rui Paulo
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