Re: SGI O2 R12 NetBSD5.1 - good but some problems

[David Brownlee <abs%netbsd.org@localhost>]

On 11 January 2011 16:32, George Harvey <fr30%dial.pipex.com@localhost> wrote:
> On Mon, 10 Jan 2011 21:44:46 +0000
> info%tamasi.org@localhost wrote:
>
>> On 10 Jan 2011, at 20:45, George Harvey wrote:
>> > On Sun, 9 Jan 2011 20:19:00 +0000 (UTC) roop <info%tamasi.org@localhost> 
>> > wrote:
>
>> > Yes, I get the "error 4' messages too and I agree they do seem to be
>> > related to network activity. In particular, I can fairly reliably hang
>> > my box by sending a largish file (around 100MB) to another system using
>> > FTP. Doesn't always hang on the first transfer but will after running a
>> > few consecutive transfers.
>
> Some further info...
> I tried an old 3Com PCI Ethernet card in my O2 and I still get "cpu
> error 4" and it hangs after a few large FTP transmits. So the problem
> is not confined to the on-board Ethernet. Curiously, large FTP receives
> seem to work fine.
>
>> There are some small updates in NetBSD-current I was going to try.
>> http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/sgimips/mace/
>
> I'll be interested to hear if they make a difference.

I've found pkgsrc/benchmarks/ttcp a useful little tool for generating
simple test network load, both
UDP & TCP and with easy options to adjust block size.

Not that its likely to provide more useful data points in this case,
but you never know :)