Date: Sun, 21 May 2006 20:28:02 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: OxY <oxy@field.hu> Cc: freebsd-net@freebsd.org, "Jin Guojun \[VFFS\]" <j_guojun@lbl.gov> Subject: Re: mbuf denied problem Message-ID: <20060521202612.D8068@fledge.watson.org> In-Reply-To: <20060520124702.B8068@fledge.watson.org> References: <002a01c67ac7$45354f40$0201a8c0@oxy> <20060520124702.B8068@fledge.watson.org>
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On Sat, 20 May 2006, Robert Watson wrote: > On Fri, 19 May 2006, OxY wrote: > >> i have a problem with mbuf... when all my free memory is gone ( i have 2gb >> ram) and memory allocation looks like this: > > I recently received an informal problem report that there is a problem with > the "denied" statistics gathering, so I think it's likely that's what is > going on here. I'll follow up with the submitter and see if we can't figure > out something more definite. I have received some further information on the problem from the reporter. Could you give this patch a try and see what effect it has? Index: uma_core.c =================================================================== RCS file: /home/ncvs/src/sys/vm/uma_core.c,v retrieving revision 1.136 diff -u -r1.136 uma_core.c --- uma_core.c 11 Feb 2006 19:20:56 -0000 1.136 +++ uma_core.c 21 May 2006 19:25:56 -0000 @@ -2413,8 +2413,7 @@ * If nothing else caught this, we'll just do an internal free. */ zfree_internal: - uma_zfree_internal(zone, item, udata, SKIP_DTOR, ZFREE_STATFAIL | - ZFREE_STATFREE); + uma_zfree_internal(zone, item, udata, SKIP_DTOR, ZFREE_STATFREE); return; } Technically, there has been an allocation failure in this case in identifying a bucket to return the item to, but since the overall case is a free, generating a failure statistics update seems undesirable. Thanks, Robert N M Watson > > Robert N M Watson > >> >> Mem: 30M Active, 1607M Inact, 245M Wired, 84M Cache, 214M Buf, 3028K Free >> Swap: 695M Total, 695M Free >> >> mbuf starts to deny... >> netstat -m show 0 deny till has memory, after that i see this: >> >> Field root# netstat -m >> 629/466/1095 mbufs in use (current/cache/total) >> 512/176/688/65536 mbuf clusters in use (current/cache/total/max) >> 512/133 mbuf+clusters out of packet secondary zone in use (current/cache) >> 0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max) >> 0/0/0/0 9k jumbo clusters in use (current/cache/total/max) >> 0/0/0/0 16k jumbo clusters in use (current/cache/total/max) >> 1181K/468K/1649K bytes allocated to network (current/cache/total) >> 7410219/101093/101499 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 >> 25288 requests for I/O initiated by sendfile >> 65 calls to protocol drain routines >> >> this is my sysctl.conf: >> net.inet.tcp.delayed_ack=0 >> net.inet.ip.intr_queue_maxlen=400 >> net.inet.tcp.inflight.enable=0 >> net.route.netisr_maxqlen=512 >> kern.ipc.somaxconn=1024 >> >> should i attach any other conf/log,etc? >> thanks! >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >> > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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