Hi, as I'm lazy, er busy, I'm pushing this idea into public instead of hacking a patch on my own: wouldn't it be nice to have something like the latency backtrace of PREEMPT_RT also in Xenomai? Even when the core is once optimised ;), there can still be drivers with long IRQ locks nuking the WCET.
I saw that there is already something for SMP spinlock debugging. Is it a lot of work to extend this to UP and maybe even all IRQ-off locks? Did someone already look at the backtrace implementation of PREEMPT_RT in details? Is is complicated to port? Does it require some changes at ADEOS level? Jan
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