Date: Thu, 28 Aug 2014 08:31:59 +0000 From: "Eggert, Lars" <lars@netapp.com> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: igb "requests for mbufs denied" Message-ID: <B170AAF8-E59B-4758-BF68-A0B18430B0AD@netapp.com>
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[-- Attachment #1 --] Hi, no matter what value I bump kern.ipc.nmbclusters and kern.ipc.nmbufs to, I still get "requests for mbufs denied" with igb interfaces, and the occasional connection stall, even when dialing down hw.igb.num_queues=1: [root@laurel: ~] netstat -m 3070/1355/4425 mbufs in use (current/cache/total) 3069/773/3842/8144896 mbuf clusters in use (current/cache/total/max) 3069/772 mbuf+clusters out of packet secondary zone in use (current/cache) 0/6/6/1018097 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/301658 9k jumbo clusters in use (current/cache/total/max) 0/0/0/169682 16k jumbo clusters in use (current/cache/total/max) 6905K/1908K/8814K bytes allocated to network (current/cache/total) 73/3831/3091 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) 6/0/0 requests for jumbo clusters denied (4k/9k/16k) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile The box in question has six igb interfaces, 2x 'I210 Gigabit Network Connection' and 4x '82580 Gigabit Network Connection' and is running: FreeBSD laurel.muccbc.hq.netapp.com 10.0-RELEASE-p7 FreeBSD 10.0-RELEASE-p7 #0: Tue Jul 8 06:37:44 UTC 2014 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 Anyone have any ideas what else to try? Thanks, Lars [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQCVAwUBU/7pGNZcnpRveo1xAQLcNwQAg2Vc3dusBevY3EgxpBjdWaNVXbXxU6lL 97HAkLDVJuURAzJ1WxKZsHaEiusYdIHX8e4vrKDg5loYdUE/nj6WWzxxuUVIgOVp JdB2gd41dDjmV7EDYBrAKQOzoXkdvsP2TPDuScdGgZtHA+5H3Lp6XvTMGKiavnpw YNuHwLEU6JI= =UAMP -----END PGP SIGNATURE-----
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