Date: Wed, 8 Mar 2006 14:52:22 +0200 From: Artis Caune <Artis.Caune@latnet.lv> To: freebsd-net@freebsd.org Subject: if_bridge drops lot of outgoing packets Message-ID: <08D42EF3-773C-41A0-B19C-1B177F4C5A5F@latnet.lv>
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# kldload if_bridge
# ifconfig bridge0 create
# ifconfig bridge0 addm em0
# ifconfig bridge0 -learn em0
# ifconfig bridge0 span em1
# ifconfig bridge0 up
traffic on em0:
30 second output rate 680818000 bits/sec, 152697 packets/sec
# netstat -w1 -bd -I em1
input (em1) output
packets errs bits packets errs bits colls drops
0 0 0 107332 0 493295560 0 50374
0 0 0 105825 0 484738088 0 53434
0 0 0 109800 0 499006384 0 44857
0 0 0 110054 0 493731344 0 46474
0 0 0 106508 0 486585112 0 54058
0 0 0 105180 0 484695272 0 52910
0 0 0 105304 0 485654248 0 54242
~ 51% packet loss per second
FreeBSD 7.0-CURRENT #0: Fri Feb 24 12:57:50 EET 2006
device = '82546EB Dual Port Gigabit Ethernet Controller' (pcix)
VM_KMEM_SIZE_MAX=536870912 (512M)
kern.ipc.nmbclusters=100000
dual 2.8GHz xeon
2G RAM
POLLING not compiled in
changes in if_em.h:
#define EM_DEFAULT_TXD EM_MAX_TXD //(4096)
#define EM_DEFAULT_RXD EM_MAX_RXD //(4096)
#define EM_TIDV 0
#define EM_TADV 0
#define EM_RADV 0
same problem with unmodified if_em/KMEM/clusters
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