Date: Mon, 25 May 2009 10:07:57 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: Pascal Braun <pascal.braun@continum.net> Cc: freebsd-current@freebsd.org Subject: Re: Problems with jumbo frames on nfe Message-ID: <20090525010757.GH23593@michelle.cdnetworks.co.kr> In-Reply-To: <20090520060723.GH9043@michelle.cdnetworks.co.kr> References: <4A127C56.6040502@continum.net> <20090519104133.GF4697@michelle.cdnetworks.co.kr> <4A12B0B8.5020507@continum.net> <20090520060723.GH9043@michelle.cdnetworks.co.kr>
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On Wed, May 20, 2009 at 03:07:23PM +0900, Pyun YongHyeon wrote: > On Tue, May 19, 2009 at 03:14:32PM +0200, Pascal Braun wrote: > > Pyun YongHyeon wrote: > > >On Tue, May 19, 2009 at 11:31:02AM +0200, Pascal Braun wrote: > > >>Hi, > > >> > > >>I'm currently testing jumbo frames on a Sunfire 4540 running with > > >>FreeBSD 8-Current (build on April 8th). While using the nfe driver I'm > > >>having some unexpected problems if i try to bring up the interface with > > >>MTU sizes greater than 1970 bytes. > > >> > > >>The error message (in dmesg) is: > > >>nfe2: initialization failed: no memory for rx buffers > > >> > > > > > >It means you've run out of jumbo clusters. Check the output of > > >"netstat -m" and see how many jumbo cluster requests were denied. > > > > 771/1149/1920 mbufs in use (current/cache/total) > > 770/680/1450/25600 mbuf clusters in use (current/cache/total/max) > > 770/510 mbuf+clusters out of packet secondary zone in use (current/cache) > > 0/9/9/12800 4k (page size) jumbo clusters in use (current/cache/total/max) > > 0/0/0/16384 9k jumbo clusters in use (current/cache/total/max) > > 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) > > 1732K/1683K/3416K 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 > > > > There are no denied requests. MTU size was about 1800. > > But I have to add, that i cant even get the interface up if the mtu size > > is above 1970. > > > > >>Does anyone have any ideas how to get jumbo frames working? > > >> > > > > > >How about increasing 9K jumbo clusters(kern.ipc.nmbjumbo9) with > > >sysctl(8)? > > > > sunfire# sysctl -a | grep jumbo > > kern.ipc.nmbjumbo16: 3200 > > kern.ipc.nmbjumbo9: 16384 > > kern.ipc.nmbjumbop: 12800 > > > > I increased kern.ipc.nmbjumbo9 to 16384 (was 6400) but that didn't seem > > to help. Do you have another idea? > > > Ok, would you try attached patch? > FYI: I've committed the patch(r192706).
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