Date: Mon, 11 Mar 2013 15:52:40 +0800 From: Ihsan Junaidi Ibrahim <ihsan@grep.my> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: increasing 'requests for jumbo clusters denied' Message-ID: <1713E286-B096-44B6-846D-81854D6F809B@grep.my>
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Hi, I'm on 9.0-RELEASE-p3 and have had a number of instances where my igb0 = network connectivity locked up under heavy load. I've had another em1 device which I used for side-band access which does = not have as much load as my primary igb0 device. I've read previous cases of this but can't seem to find any fitting = solutions. I've tried increasing mbufs and jumbo mbufs: nsv01-kul:ihsan $ sysctl -a | grep nmb kern.ipc.nmbjumbo16: 3200 kern.ipc.nmbjumbo9: 25600 kern.ipc.nmbjumbop: 12800 kern.ipc.nmbclusters: 262144 but I'm still receiving a lot of 'requests for jumbo clusters denied' = stats on netstat -m output. nsv01-kul:ihsan $ netstat -m 7347/3063/10410 mbufs in use (current/cache/total) 334/2658/2992/262144 mbuf clusters in use (current/cache/total/max) 334/1330 mbuf+clusters out of packet secondary zone in use = (current/cache) 1749/1310/3059/12800 4k (page size) jumbo clusters in use = (current/cache/total/max) 5116/563/5679/25600 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 55544K/16388K/71933K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/25154247/0 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 The server has not locked up yet after increasing the mbufs (been less = than 8 hours since increasing this) but can someone enlighten me what = could be the causes for jumbo clusters requests being denied although = I've increased the 9k jumbo clusters to 25600? Thanks. ihsan=
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