iperf -c machine1 -d doesn't lock mine up, but adding "-p 2" (any number of multiple threads) will do it every time, although not necessarily right away.
And yes, this makes the forcedeth driver virtually useless on a gigabit network. My findings were the same, only a reboot will bring the interface back online. db On 9/25/07, BullCreek <[EMAIL PROTECTED]> wrote: > I've played around with it a bit more, and even with the options > max_interrupt_work=20 set in /etc/modprobe.d/forcedeth, it still > happens. Only additional thing to report, is I happened upon an easy > way to reproduce the hangup every time: > > 1. Login to machine1 which has a gigabit ethernet card in it and is > attached to a gigabit switch. Run "iperf -s" > > 2. Login to a machine that has the gigabit forcedeth adapter in it - > also hooked up to a gigabit switch. Run "iperf -c machine1 -d". > > The command in step two generates a lot of traffic in that it tells it > to test speeds going both ways at once. On both my forcedeth systems, > it will lock up the interface almost immediately, requiring a full > reboot (i.e. /etc/init.d/networking restart has no effect). Note the > problem only occurs under heavy load - if you just run iperf -c machine1 > without the -d option, it usually won't lock up. > > Should we report this bug to the kernel mailing list? I see that back > in August, someone reported similar behavior in 2.6.22.1 but said adding > the forcedeth.max_interrupt_work=20 option to their bootline fixed it > (FWIW, I tried that and just go invalid option with feisty). Here is > the thread: > > http://lkml.org/lkml/2007/8/5/92 > > Does anyone know how to tell if the options in modprobe.d are in effect > - dmesg doesn't show anything and lsmod doesn't have any flags? I have > tried putting the appropriate line in /boot/grub/menu.lst, in > /etc/modprobe.d/options, and in /etc/modprobe.d/forcedeth and as best as > I can tell none have had any effect. > > P.S. I'm now wishing I had spent a little more and bought Intel boards > with Intel NICs. > > -- > Random pauses when transferring data at gigabit speeds with forcedeth driver > https://bugs.launchpad.net/bugs/130075 > You received this bug notification because you are a direct subscriber > of the bug. > -- Random pauses when transferring data at gigabit speeds with forcedeth driver https://bugs.launchpad.net/bugs/130075 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
