Date: Wed, 04 Aug 2004 15:05:36 +0200 From: sirola@fisica.unige.it To: freebsd-questions@freebsd.org Subject: [Q] poor network performance Message-ID: <87fz73jbof.fsf@statpro.com>
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Hello,
I have Dell PE1750 server with FreeBSD 4.10-RELEASE-p2 freshly
installed. The server shows very low transfer rates with other hosts,
but i can't see any error/strange data on interfaces/mbufs
statistics. I tried scp on both interfaces and it's very slow (approx
100KBytes/s), while if it try to route back the response packets (acks) on
the other interface it goes very fast (100MBytes/s). Swapping cables
and configuration doesn't show any difference.
The host is configured as follows:
* two gigabit ethernets: <Broadcom BCM5704C Dual Gigabit Ethernet, ASIC rev. 0x2002>
seen as bge0 and bge1
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<RXCSUM,TXCSUM>
inet 192.168.2.3 netmask 0xffffff00 broadcast 192.168.2.255
inet6 fe80::20b:dbff:fe93:3b5a%bge0 prefixlen 64 scopeid 0x1
ether 00:0b:db:93:3b:5a
media: Ethernet 100baseTX <full-duplex>
status: active
bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<RXCSUM,TXCSUM>
inet 192.168.3.3 netmask 0xffffff00 broadcast 192.168.3.255
inet6 fe80::20b:dbff:fe93:3b5b%bge1 prefixlen 64 scopeid 0x2
ether 00:0b:db:93:3b:5b
media: Ethernet 100baseTX <full-duplex>
status: active
bge1 has an alias to the host public ip address (not shown).
* 1 GB RAM
* sysctl.conf as follows:
kern.ipc.somaxconn=1024
kern.ipc.shmmax=700000000
kern.ipc.shmall=524280
kern.ipc.shm_use_phys=1
* loader.conf as follows:
kern.ipc.nmbclusters="32768"
* routing is as follows:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.3.1 UGSc 1 64 bge1
127.0.0.1 127.0.0.1 UH 1 2683 lo0
192.168.0 192.168.2.1 UGSc 6 2385 bge0
192.168.2 link#1 UC 2 0 bge0
192.168.2.1 00:01:02:24:da:2c UHLW 6 8029 bge0 972
192.168.2.3 00:0b:db:93:3b:5a UHLW 0 87 lo0
192.168.3 link#2 UC 2 0 bge1
192.168.3.1 00:05:1c:0b:26:b3 UHLW 2 6861 bge1 988
192.168.3.3 00:0b:db:93:3b:5b UHLW 0 17 lo0
<public network> link#2 UC 1 0 bge1
<public ip> 00:0b:db:93:3b:5b UHLW 0 6167 lo0
While transfering files, I see what (to me) seems a "normal" behavior
with netstat -m
515/704/131072 mbufs in use (current/peak/max):
515 mbufs allocated to data
512/596/32768 mbuf clusters in use (current/peak/max)
1368 Kbytes allocated to network (1% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
This stuff is going to drive me crazy...
Thanks in advance for your time / help,
e.
--
Enrico Sirola <sirola@fisica.unige.it>
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