* Mark Wielaard (mjw@xxxxxxxxxx) wrote: > Hi Mathieu, > > On Fri, Jul 12, 2013 at 01:08:28PM -0400, Mathieu Desnoyers wrote: > > * Sarah Sharp (sarah.a.sharp@xxxxxxxxxxxxxxx) 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? LTTng-UST tracepoints are not built on sdt.h, but they can optionally emit sdt.h instrumentation. All you need to do is run: ./configure --with-sdt when configuring lttng-ust, and after a make install, sdt.h STAP_PROBEV() will be emitted whenever a lttng-ust tracepoint() macro is used in the system. > Can tools use lttng-ust and <sys/sdt.h> tracepoints > interchangeably by parsing the ELF notes described in > http://sourceware.org/systemtap/wiki/UserSpaceProbeImplementation Since lttng-ust tracepoints emit sdt.h instrumentation, yes. However, please note that the reverse is not possible: sdt.h instrumentation does not allow tracing with LTTng-UST. Thanks, Mathieu > > Thanks, > > Mark -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
