Subject: Re: 80Mbps routing with Micrel KS8695
To: Jason Thorpe <firstname.lastname@example.org>
From: David Laight <email@example.com>
Date: 01/14/2005 20:17:22
> You can gain a lot of performance by not using Tx interrupts, on
> devices that can do it.
> Basically, lazily/opportunistically GC the Tx descriptors e.g. once per
> second, when you get Rx interrupts, and when you run out of descriptors
> on the (*if_start)() routine. Look at status bits in the pending
And on tx setup....
Unless your NFS implementation  detects when buffers are freed!
and refuses to send anything else until they are - even if it
receives an ack!!!
 some commercial Unix NFS code used to behave this way.
David Laight: firstname.lastname@example.org