Re: NetBSD/sparc64 and GbE performance

On Mon, May 09, 2011 at 09:31:57AM +0100, Julian Coleman wrote:
>   I received a comment that Apple got better throughput on the same gem
>   hardware than we did.  However, I'm not sure if that points to the gem(4)
>   driver, or our stack.  Our cas(4) driver is very similar to the gem(4)
>   one.

If I remember correctly a gem(4) in a 1GHz PowerMac G4 could saturate a
gigabit ethernet link.

> It also has the ability to match TCP streams to up to 4 interrupt
> lines, so that different CPU's can handle different streams.

I remember that this feature didn't work very well for a lot of workloads
because the number of TCP streams the hardware support was too small.

	Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/