On Wed, 16 Mar 2016 15:34:30 +0100 Jiri Olsa <jo...@kernel.org> wrote:
> We suppress events with attr::exclude_kernel set when > the event is generated, so following capture will > give no warning but won't produce any data: > > $ sudo perf record -e sched:sched_switch:u ls > $ sudo /perf script | wc -l > 0 > > Checking the attr::exclude_(kernel|user) at the event > init time and failing right away for tracepoints from > uprobes/kprobes and native ones: > > $ sudo perf record -e sched:sched_switch:u ls > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid argument) for > event (sched:sched_switch). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured? > > $ sudo perf record -e probe:sys_read:u ls > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid argument) for > event (probe:sys_read). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured? > > $ ./perf record -e probe_ex:main:k ./ex > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid argument) for > event (probe_ex:main). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured? > > Acked-by: Namhyung Kim <namhy...@kernel.org> > Signed-off-by: Jiri Olsa <jo...@kernel.org> Acked-by: Steven Rostedt <rost...@goodmis.org> -- Steve
