Hi, On 3.18 kernel running on an arm64 device, I tried running: perf record -a -g -e sched:sched_wakeup
I was expecting something like the output at: www.brendangregg.com/perf.html But I don't see stacktraces, could I be missing any patches you could point me to? I do see stack traces if I do regular perf profiling (perf record -F 99 -a -g). Below is the output I get. Thanks for any insight into this. Regards, Joel sailfish:/data # ./perf report # Samples: 22 of event 'sched:sched_wakeup' # Event count (approx.): 410333 # # Children Self Trace output # ........ ........ ............................................................. # 61.29% 61.29% comm=ksoftirqd/0 pid=3 prio=120 success=1 target_cpu=000 | ---0 33.25% 33.25% comm=hw pid=12777 prio=120 success=1 target_cpu=002 | ---0 2.46% 2.46% comm=kworker/u8:2 pid=12482 prio=120 success=1 target_cpu=002 | ---0 1.39% 1.39% comm=migration/2 pid=21 prio=0 success=1 target_cpu=002 | ---0