Bugtraq mailing list archives
Re: UDP packet handling weird behaviour of various operating systems
From: Kevin Day <toasty () temphost dragondata com>
Date: Thu, 26 Jul 2001 16:48:34 -0500 (CDT)
The flood is performed via a Gigabit link. The packet rate handling of win2k is wonderful, it even beats an OpenBSD 2.8. Kudos to MS guys, this one is a real hit. As I couldn't believe my eyes I ran some applications on it (crunching queries on the local MS SQL2k server etc) and I got timely-fashion responses.I believe you are actually testing link layer performance, PCI bus speed and network cards, not operating systems ;)
Actually, you're probably entering a "livelock" situation. Packets were coming in so fast that the interrupt handler is consuming all your time. Alot of high speed network devices have special modes to prevent this from happening. (Only interrupt when a certain number of packets are in the FIFO, make sure the interrupt isn't asserted for more than x% of the time, etc). This is probably possible on 100MBit links on slow CPUs too. Which network card are you using? I don't ever want to buy one. :) -- Kevin Day toasty () dragondata com - kevin () stileproject com
Current thread:
- UDP packet handling weird behaviour of various operating systems Stefan Laudat (Jul 25)
- Re: UDP packet handling weird behaviour of various operating systems Michal Zalewski (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Kevin Day (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Cade Cairns (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Michal Zalewski (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Cade Cairns (Jul 27)
- Re: UDP packet handling weird behaviour of various operating systems aland (Jul 27)
- Re: UDP packet handling weird behaviour of various operating systems Stefan Laudat (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Michal Zalewski (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Stefan Laudat (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Niels Bakker (Jul 27)
- RE: UDP packet handling weird behaviour of various operating systems David LeBlanc (Jul 26)
- Re: UDP packet handling weird behaviour of various operating systems Radu-Adrian Feurdean (Jul 27)
- Re: UDP packet handling weird behaviour of various operating systems Michal Zalewski (Jul 26)