> http://rootshell.com/archive-j457nxiqi3gq59dv/199803/biffit.c > > 1. Linux 2.4.7 UP (pristine source, waiting for a new shiny Alan Cox patch) > - system gets frozen after 3 seconds of flood on a gigabit link. > Same result at a 100Mbps. The top utility shows (at least as long as it can) > that system(kernel) gets 100% of the CPU in its march to death. Same for > Linux kernel 2.2.19. 2.4.6 (modular, unpatched, selfcompiled) on an old P133: biffit against loopback: 99% cpu(system), no slowdown, system responds normaly. (no slowdown) biffit against eth0: same effect. (doh, cause linux sends it over loopback) Biffit from a PIII/600 FDX 100mbit connected: same as above. in the later case: my ssh connection to that system (going through the same nic that was target) became a bit sluggish. Console access showed no impact. It obviously just consumes idle time. Interupt load was not very high. (ping -f is much worse for interrupts) Hardware: Board: ASUS p55tp4n (Intel FX chipset) CPU: P133 (with F00F bug) RAM: 64mb eth0: RealTek RTL8139 Fast Ethernet at 0xc480b000, 00:00:cb:11:22:33, IRQ 11 eth0: Identified 8139 chip type 'RTL-8139C' (nothing else on IRQ11) running squid, a webserver, 3 ssh connections, and having several iptables rules (those udp packets matched ACCEPT-rule #2 (loopback case) and rule #4 on input chain) no SMP. > I would like to hear some other results for other operating systems. Windows 98 (running on the P3/600): 25% load. no side effects Juergen -- Juergen P. Meier
This archive was generated by hypermail 2b30 : Fri Jul 27 2001 - 10:35:45 PDT