[netperf-talk] global question concerning Netperf test and SMP support

[Rick Jones]

On 04/04/2012 10:58 AM, Andrew Gallatin wrote:
>
> Simon,
>
> A random few thoughts:
>
> Why do you use a 128 byte TCP message size? Unless there is some
> particular use case you're interested in, this is going to stress
> things like the client's system call interface, and not so much the
> networking system. For 10GbE line rate, you're going to have to issue
> more than 10 million syscalls / second. Also note the -- -M parameter
> to adjust the *server*'s message size.

Terminology nit - even if the netperf docs aren't good about it. :)  The 
-m and -M options do not control message size, they control the size of 
the buffers posted in send and receive calls respectively.  And in the 
case of -M, the receive calls can still complete before filling the buffer.

rick