On Wed, 1 Feb 2006, Greg 'groggy' Lehey wrote:
Last week, at the Linux.conf.au in Dunedin, Van Jacobson presented some slides about work he has been doing rearchitecting the Linux network stack. He claims to have reduced the CPU usage by 80% and doubled network throughput (he expects more, but it was limited by memory bandwidth). The approach looks like it would work on FreeBSD as well. I spoke to him and he confirmed. He's currently trying to get the code released as open source, but in the meantime his slides are up on http://www.lemis.com/grog/Documentation/vj/. Yes, this is my web site. The conference organizers are going to put it up on their web site soon, but in the meantime he's asked me to put it were I can. Comments? Greg
The slides alone don't tell much. There seem to be two possibilities - either "channelizing" everything is responsible for the improvements, or the fact that it waits until the socket is woken up to process the packets is responsible for the improvements. I can't understand why the final step involves a userland TCP stack. The rest of the presentation doesn't explain why that is necessary.
I'm sure we'll learn more once we see the source. Mike "Silby" Silbersack _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
