Hi,
I am trying to get an ipipe trace and need help to get it working.
I am using Xenomai 2.6 with linux 3.0.0.
The kernel is compiled with following config parameters:
CONFIG_IPIPE_DEBUG=y
CONFIG_IPIPE_DEBUG_CONTEXT=y
CONFIG_IPIPE_DEBUG_INTERNAL=y
CONFIG_IPIPE_TRACE=y
CONFIG_IPIPE_TRACE_ENABLE=y
CONFIG_IPIPE_TRACE_MCOUNT=y
CONFIG_IPIPE_TRACE_IRQSOFF=y
CONFIG_IPIPE_TRACE_SHIFT=14
CONFIG_IPIPE_TRACE_VMALLOC=y
CONFIG_IPIPE_TRACE_PANIC=y
CONFIG_DEBUG_KERNEL=y
The /proc/ipipe direcotry is created.
In my application I am using:
xntrace_max_begin(0); -> To start tracing.
xntrace_max_end(0); -> To stop tracing.
The function trace that I get in the /proc/ipipe/trace/max file does not
have the xenomai calls that I am invoking e.g. rt_timer_read.
Can you pl advice if this is the correct method of using the tracer?
Can you pl elaborate on the value being passed in? I see it is
initializing to:
+ tp->nmi_saved_v = v;
but could not understand it's use? Is it the no. of nested nmi's that
will be traced?
Are there any examples of the use of xntrace_max_* functions?
I have also tried using xntrace_user_freeze by looking at latency.c. The
contents of the frozen file does have a trace to the functions I am
calling e.g. rt_timer_read, but I do not see any interrupt processing in
the trace.
Will interrupts be traced by the ipipe tracer? Is there any other way to
trace the interrupts with a timestamp that are handled by ipipe?
Thanks for your time.
Warm Rgds,
Mak.
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