---------{ tracing mini-HOWTO }--------------> pick up the latest latency tracer patch from: http://redhat.com/~mingo/private/latency-tracer-v2.6.24-rc2-git5-combo.patch apply it and enable CONFIG_FUNCTION_TRACING, then pick up trace-cmd.c: http://redhat.com/~mingo/private/trace-cmd.c to trace what the system is doing for 1 second, do something like this: ./trace-cmd sleep 1 > trace.txt If everything goes well then trace.txt should contain a pretty large trace of all the stuff the kernel was during in that 1 second. if it's an SMP box then first do: echo 1 > /proc/sys/kernel/trace_all_cpus to get a global trace. Let me know if something doesnt work with this scheme. Ingo