Date: Sat, 20 May 2006 13:50:37 +0200 From: "Peter Blok" <pblok@bsd4all.org> To: "'OxY'" <oxy@field.hu>, <freebsd-net@freebsd.org> Cc: "'Jin Guojun \[VFFS\]'" <j_guojun@lbl.gov> Subject: RE: mbuf denied problem Message-ID: <001501c67c03$9c3457e0$8a01a8c0@ntpc> In-Reply-To: <002a01c67ac7$45354f40$0201a8c0@oxy>
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Hi, I have posted a reply to similar questions a couple of times. Although I'm subscribed to freebsd-net I never saw the answer appear in the list. The ... denied counts is coming from calling uma_reclaim, which will in the end call uma_zfree_internal which is increasing the fail counter. I am not sure, but I believe the mbuf and cluster zones are static. So if I set the UMA_ZONE_NOFREE flag in kern_mbuf.c, no attempt will be made to do a free at all. Here's my patch. It works, but I'm not sure it is ok. --- sys/kern/kern_mbuf.c.orig Sun Apr 9 13:32:51 2006 +++ sys/kern/kern_mbuf.c Sun Apr 9 13:33:19 2006 @@ -168,7 +168,7 @@ #else NULL, NULL, #endif - MSIZE - 1, UMA_ZONE_MAXBUCKET); + MSIZE - 1, UMA_ZONE_MAXBUCKET|UMA_ZONE_NOFREE); zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, mb_ctor_clust, mb_dtor_clust, @@ -177,7 +177,7 @@ #else NULL, NULL, #endif - UMA_ALIGN_PTR, UMA_ZONE_REFCNT); + UMA_ALIGN_PTR, UMA_ZONE_REFCNT|UMA_ZONE_NOFREE); if (nmbclusters > 0) uma_zone_set_max(zone_clust, nmbclusters); -----Original Message----- From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] On Behalf Of OxY Sent: Friday, May 19, 2006 12:06 AM To: freebsd-net@freebsd.org Cc: Jin Guojun [VFFS] Subject: mbuf denied problem hi! i have a problem with mbuf... when all my free memory is gone ( i have 2gb ram) and memory allocation looks like this: 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"
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