Hi All
I bought my first amd64 yesterday, and have build from stage1 using the
2005.1 minimal install CD. Everything's great apart from poor network
performance. I get 5.6mb/s sustained whilst transferring a 500mb file,
where I would normally get twice that on 100Mbit ethernet. I know it's
not the ftp server at fault as I can use another box to tranfer the same
file at the correct speed.
I get these messages in the syslog while this file is being transferred:
APIC error on CPU0: 00(40)
APIC error on CPU0: 40(40)
APIC error on CPU0: 40(40)
APIC error on CPU0: 40(40)
APIC error on CPU0: 40(40)
APIC error on CPU0: 40(40)
Also the errors counter in /proc/interrups is incremented by 6 as I
would expect.
I've tried the gentoo liveCD running kernel 2.6.12-gentoo and the one
I've compiled which is 2.6.13-gentoo-r3.
The built in ethernet interface is a Realtek based on the 8139too
module. I have also tried slotting in a older 3com 3c59x card which
exactly the same results.
If I disable APIC either by "noapic" on the kernel command line, or
disabling it in the BIOS, I get a system which boots very very slowly
and a network card that doesn't work at all.
Has anyone seen anything like this? Or have I just bought a crap
motherboard? It's an Optronix OP-K9A200G-MLF. I have asked the vendor if
they have a BIOS fix but I'm not holding my breath!
Thanks,
James
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