em(4) dropping packets
Przemyslaw Frasunek
venglin at freebsd.lublin.pl
Sun Jun 13 13:31:41 GMT 2004
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Hello,
I'm running 5.2.1-RELEASE on two heavly loaded USENET servers equipped with
Intel PRO/1000 on-board NICs:
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.19> port
0xd800-0xd83f mem 0xfe8c0000-0xfe8dffff irq 28 at device 1.0 on pci3
Recently, on both servers I've noticed increasing number of input errors on
netstat -i:
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
em0 1500 <Link#1> 00:30:48:70:43:24 531562478 4362496 782338592
0 0
NIC stats shows, that errors are related to "receive no buffers", but
netstat -m doesn't show any mbuf or mbuf cluster exhaustion.
em0: Excessive collisions = 0
em0: Symbol errors = 0
em0: Sequence errors = 0
em0: Defer count = 0
em0: Missed Packets = 85980
em0: Receive No Buffers = 4274612
em0: Receive length errors = 0
em0: Receive errors = 0
em0: Crc errors = 0
em0: Alignment errors = 0
em0: Carrier extension errors = 0
em0: XON Rcvd = 0
em0: XON Xmtd = 0
em0: XOFF Rcvd = 0
em0: XOFF Xmtd = 0
em0: Good Packets Rcvd = 531193051
em0: Good Packets Xmtd = 781747213
mbuf usage:
GEN cache: 27/4032 (in use/in pool)
CPU #0 cache: 3109/3232 (in use/in pool)
CPU #1 cache: 34/512 (in use/in pool)
CPU #2 cache: 21/512 (in use/in pool)
CPU #3 cache: 11/512 (in use/in pool)
Total: 3202/8800 (in use/in pool)
Mbuf cache high watermark: 512
Maximum possible: 51200
Allocated mbuf types:
3202 mbufs allocated to data
17% of mbuf map consumed
mbuf cluster usage:
GEN cache: 25/3864 (in use/in pool)
CPU #0 cache: 3101/3176 (in use/in pool)
CPU #1 cache: 37/160 (in use/in pool)
CPU #2 cache: 23/128 (in use/in pool)
CPU #3 cache: 11/128 (in use/in pool)
Total: 3197/7456 (in use/in pool)
Cluster cache high watermark: 128
Maximum possible: 25600
29% of cluster map consumed
17112 KBytes of wired memory reserved (42% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
If you have any ideas I'd really appreciate it.
- --
* Fido: 2:480/124 ** WWW: http://www.frasunek.com/ ** NICHDL: PMF9-RIPE *
* JID: venglin at jabber.atman.pl ** PGP ID: 2578FCAD ** HAM-RADIO: SQ8JIV *
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