Date: Tue, 17 Jun 2003 14:27:41 -0400 From: Bill Moran <wmoran@potentialtech.com> To: jaime@snowmoon.com Cc: freebsd-questions@freebsd.org Subject: Re: ping: sendto: No buffer space available Message-ID: <3EEF5D9D.2060307@potentialtech.com> In-Reply-To: <20030617122628.N96282@malkav.snowmoon.com> References: <20030617075240.L94567@malkav.snowmoon.com> <3EEF1302.8060908@potentialtech.com> <20030617092913.J94567@malkav.snowmoon.com> <3EEF2108.1010802@potentialtech.com> <20030617122628.N96282@malkav.snowmoon.com>
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jaime@snowmoon.com wrote: > On Tue, 17 Jun 2003, Bill Moran wrote: > >>> I think that the NIC is on the logic board. I can try to install >>>a PCI card and use that in its place to see if the problem goes away. >>>Should I bother? >> >>I would. There are two possibilities that I would consider here: >>a) The NIC has gone flaky with age >>b) Newer drivers don't talk to that particular NIC as well as the old Another possibility that bites me in the ass when I'm not looking is link-level problems. Occasionally I've had weird issues that were resolved by replacing a switch or patch cable, or by moving to a different port on a switch. As usual ... just throwing ideas at you. >>Never helped for me either. You may want to check, but in my experience >>the output of 'netstat -m' will also tell you that you have plenty of >>network buffers available. > > > bash-2.05b$ netstat -m > 144/768/26624 mbufs in use (current/peak/max): > 139 mbufs allocated to data > 5 mbufs allocated to packet headers > 138/572/6656 mbuf clusters in use (current/peak/max) > 1336 Kbytes allocated to network (6% of mb_map in use) > 0 requests for memory denied > 0 requests for memory delayed > 0 calls to protocol drain routines > > That was durring normal operation. The following are at the tail > end of one of the outages: > > bash-2.05b$ netstat -m > 477/768/26624 mbufs in use (current/peak/max): > 386 mbufs allocated to data > 91 mbufs allocated to packet headers > 384/572/6656 mbuf clusters in use (current/peak/max) > 1336 Kbytes allocated to network (6% of mb_map in use) > 0 requests for memory denied > 0 requests for memory delayed > 0 calls to protocol drain routines <snip additional netstat -m output> > 144/768/26624 mbufs in use (current/peak/max): > 139 mbufs allocated to data > 5 mbufs allocated to packet headers > 136/572/6656 mbuf clusters in use (current/peak/max) > 1336 Kbytes allocated to network (6% of mb_map in use) > 0 requests for memory denied > 0 requests for memory delayed > 0 calls to protocol drain routines > > It looks like something is causing it to pile up packets in the > buffers temporarily. Any thoughts? In the mean time, I will see if I can > dig up a PCI ethernet card. Yes, but it doesn't look like the pile is deep enough that it should have run out of buffer space. This one is a bit of a shot in the dark, but try using rndcontrol to increase the entropy collection. I'm not sure why I think this might help, but I have some vague memory of it helping somewhere. -- Bill Moran Potential Technologies http://www.potentialtech.com
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