On Wed, Aug 12, 2015 at 11:27:35AM +0200, Christian Ascheberg wrote: > Is there any documentation regarding limitations of perf/ftrace support on > ARM (compared to x86)?
There's Documentation/features/ which lists the status of architecture support for various kernel options. I don't know of any other documentation. > For example, I also noticed that 'perf help' lists 'trace' command, but > running 'perf trace' says 'is not a perf-command'. That doesn't have anything to do with something missing in ARM afaics. It's probably because your perf wasn't built with libaudit. Information is printed about this when you build perf. The fact that 'perf help' lists unavailable commands is probably a bug. ~/dev/linux/tools/perf$ make BUILD: Doing 'make -j8' parallel build config/Makefile:366: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
