* Peter Zijlstra [off-list ref] wrote:

On Mon, 2012-01-30 at 11:11 +0100, Ingo Molnar wrote:

quoted

So, what workflow are you suggesting to Andrew?

Librarize perf record, then in your code do something like:

#include "perf_record.h"

Maybe. (and then it shouldnt be limited to perf_record.h but 
should be events.h plus libevents.so or such)

  handle = perf_record_init(); /* creates perf events and creates
                                  a record thread that writes samples
                                  to perf.data, consumes env(PERF_*)
                                  for configuration, registers with
                                  at_exit() for cleanup */
  if (!handle)
    /* burn */

  /* do you other code */

  perf_record_start(handle);

  /* do the bit you want profiled */

  perf_record_stop(handle);

Then build with -lperfrecord or so. Not too hard, right?

Isnt a simple prctl() so much easier and faster?

What's your concern with the prctl()? This would arguably be the 
right kind of usage for prctl(): it's an established API/ABI for 
process/task-wide settings.

Thanks,

	Ingo