Messages in this thread |  | | | Date | Fri, 10 Dec 2004 22:09:03 +0100 | | From | Ingo Molnar <> | | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-15 |
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* Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:
> [1] I still do not get traces where cpu_delay switches CPU's. I only > get trace output if it starts and ends on a single CPU. [...]
lt001.18RT/lt.02 is such a trace. It starts on CPU#1:
<unknown-3556 1...1 0µs : find_next_bit (user_trace_start)
and ends on CPU#0:
<unknown-3556 1...1 247µs : _raw_spin_lock_irqsave (user_trace_stop)
the trace shows a typical migration of an RT task.
(but ... i have to say the debugging overhead is horrible. Please try a completely-non-debug-non-tracing kernel just to see the difference.)
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