Re: Linuxppc and MPC8255 routing performance

On Tuesday 13 November 2001 20:02, Dan Malek wrote:

Ricardo Scop wrote:

quoted

Nevertheless, I'm aware that using local bus memory for I/O data flowing
between CPM and CPU may improve performance in some Linux applications,
so I would like to experiment with this.

You don't need this as a solution to your performance troubles.  I have
been experimenting with using this space for socket buffers, but unless
you have something else on the bus consuming the cycles, I haven't seen
any benefit.  It could be very useful for custom network applications,

Gee, sorry... I meant _network_ applications, indeed. And, thank you for your
advice.

As for our performance troubles, there have been some improvements; we were
making some mistakes regarding both FCC and PHY programming. After fixing
those, we're able to achieve more than 50 Mbits/s in a _real_ FTP transfer,
which is more than enough for our router application.  We are still
conducting more performance tests with netperf, and will publish the resuts
when available.

Thanks,

~Ricardo

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