On Mon, Oct 01, 2018 at 12:59:27PM -0700, Andi Kleen wrote: > From: Andi Kleen <[email protected]> > > Implement a weak group fallback for perf record, similar to the existing perf > stat support. > This allows to use groups that might be longer than the available counters > without > failing. > > Before: > > $ perf record -e > '{cycles,cache-misses,cache-references,cpu_clk_unhalted.thread,cycles,cycles,cycles}' > -a sleep 1 > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid argument) for > event (cycles). > /bin/dmesg | grep -i perf may provide additional information. > > After: > > $ ./perf record -e > '{cycles,cache-misses,cache-references,cpu_clk_unhalted.thread,cycles,cycles,cycles}:W' > -a sleep 1 > WARNING: No sample_id_all support, falling back to unordered processing > [ perf record: Woken up 3 times to write data ] > [ perf record: Captured and wrote 8.136 MB perf.data (134069 samples) ] > > Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Jiri Olsa <[email protected]> thanks, jirka
