On Thu, Dec 06, 2007 at 05:02:40PM -0600, Chris Friesen wrote:
quoted text
> Andi Kleen wrote:
> 
> >>On a 1.4GHz P4 I measured a 44% increase in latency between a unix 
> >>datagram and a UDP datagram.
> 
> >That's weird.
> 
> I just reran on a 3.2GHZ P4 running 2.6.11 (Fedora Core 4).  42% latency 
> increase.

Sounds like something that should be looked into. I know of no
principal reasons for that.

quoted text
> For stream sockets, unix gives approximately a 62% bandwidth increase 
> over tcp.   (Although tcp could probably be tuned to do better than this.)

How long a stream did you test? You might be measuring slow start.

-Andi
--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/