Hiya,
I recently upgraded my Network Infrstructure to Gigabit Ethernet as
well as my Network Server form Fedora Core 1 to Fedora Core 2. So far so
good...
After the first network performance tests with netperf and netpipe I got
really disappointed, as the diskless network performance is around 200
Mbit/s.
A linux server with following specifications is used in this szenario:
* Hardware
Asus A7V-266E
Athlon 1800 XP
512MB RAM
eth0: Intel Pro/1000 MT Desktop Adapter, PCI (1 Gbit Fullduplex)
eth1: Realtek 8139, PCI (100Mbit Fullduplex)
Permedia 2 Graphics Adapter, PCI
hda: Maxtor 80GB IDE HD (UDMA5)
hdc: IBM 120GB IDE HD (UDMA5)
* Software
Fedora Core 2 (latest patchlevel)
Kernel 2.6.8-1.521
e1000 driver, version: 5.3.19-NAPI
* Switch: D-link DGS-1008D Gigabit Switches
* Cables: Cat5 shielded TP cables tested with Fluke for Cat5 compliance
The hardware should be ok, as I tested eth0 within my Windows XP Workstation
and the card performed well with 560Mbit/s without tuning. The two Windows
XP workstations with onboard Intel Pro/1000 CT adapters even showed a
performace of 800Mbit/s without tuning.
So I guess the bottleneck has to be somewhere within the Fedora Core 2
System.
I also checked the CPU load during the tests, which peaked around 20%, so
this can't be the problem either. The card is configured correctly, as
ethtool eth0 shows following output:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: umbg
Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
I tried almost everything now, so I have any further ideas...
Any suggestions please?
Regards,
Axel.
