On Monday 04 June 2007, Ingo Molnar wrote: > * Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx> wrote: > > Yes, the following patch makes iperf work better than ever. But are > > other broken applications going to have same problem. Sounds like the > > old "who runs first" fork() problems. > > this is the first such app and really, and even for this app: i've been > frequently running iperf on -rt kernels for _years_ and never noticed > how buggy its 'locking' code was, and that it would under some > circumstances use up the whole CPU on high-res timers. I must admit I don't know much about that topic, but there is one thing I don't understand. Why is iperf (even if it's buggy) able to use up the whole cpu? I didn't run it as root but as my normal user so it should have limited rights. Shouldn't the linux scheduler distribute cpu time among all running processes? Maxi
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