On Thu, Jan 23, 2020 at 8:15 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote: > > hi, > sending 2 fixes to fix kernel support for loading > trampoline programs in bcc/bpftrace and allow to > unwind through trampoline/dispatcher. > > Original rfc post [1]. > > Speedup output of perf bench while running klockstat.py > on kprobes vs trampolines: > > Without: > $ perf bench sched messaging -l 50000 > ... > Total time: 18.571 [sec] > > With current kprobe tracing: > $ perf bench sched messaging -l 50000 > ... > Total time: 183.395 [sec] > > With kfunc tracing: > $ perf bench sched messaging -l 50000 > ... > Total time: 39.773 [sec] > > v4 changes: > - rebased on latest bpf-next/master > - removed image tree mutex and use trampoline_mutex instead > - checking directly for string pointer in patch 1 [Alexei] > - skipped helpers patches, as they are no longer needed [Alexei] Applied. Thanks
