[lttng-dev] Help adding trace events to xHCI

[Mark Wielaard]

Hi Mathieu,

On Fri, Jul 12, 2013 at 01:08:28PM -0400, Mathieu Desnoyers wrote:
> * Sarah Sharp (sarah.a.sharp at linux.intel.com) wrote:
> > Thanks for the suggestion.  I'm not familiar with all the userspace
> > tools for trace events, so I didn't know about the command parser.  Is
> > there documentation or a list of resources for all the userspace trace
> > event plugins?  If so, can you give us a pointer to it?
> 
> You might want to try out LTTng-UST. It provides TRACEPOINT_EVENT() and
> tracepoint() for user-space instrumentation. See:
> 
> - https://lttng.org/files/doc/man-pages/man3/lttng-ust.3.html

Is that build on the <sys/sdt.h> ust probe points as embedded in glibc
for example that gdb and systemtap use to access user space trace
points? Can tools use lttng-ust and <sys/sdt.h> tracepoints
interchangeably by parsing the ELF notes described in
http://sourceware.org/systemtap/wiki/UserSpaceProbeImplementation

Thanks,

Mark