Thread (21 messages) 21 messages, 8 authors, 2013-07-26

Re: Help adding trace events to xHCI

From: Mark Wielaard <hidden>
Date: 2013-07-12 19:35:59

Hi Mathieu,

On Fri, Jul 12, 2013 at 01:08:28PM -0400, Mathieu Desnoyers wrote:
* Sarah Sharp (sarah.a.sharp@linux.intel.com) wrote:
quoted
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
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