Messages in this thread | | | Date | Mon, 12 Aug 2013 12:26:57 -0300 | From | Karim Yaghmour <> | Subject | Re: Reading perf counters at ftrace trace boundaries |
| |
On 13-08-11 11:24 PM, zhangwei(Jovi) wrote: > If you want to base on ftrace, below two approach maybe take into use: > > - register_ftrace_function/unregister_ftrace_function > > - perf_event_create_kernel_counter (function event id is 1) > > the first one is simplest, IMO.
Thx for the pointers.
> You need to write your own kernel module to use these approach.
As a proof-of-concept, sure. For something more permanent it would make more sense to adapt the various perf/ftrace tools to make this available on the command line with other options. But we're far away from that for the moment.
-- Karim Yaghmour CEO - Opersys inc. / www.opersys.com http://twitter.com/karimyaghmour
| |