On Wed, 2013-06-26 at 17:50 +0200, Ingo Molnar wrote: > * Peter Zijlstra <pet...@infradead.org> wrote: > > > On Wed, Jun 26, 2013 at 11:37:13AM +0200, Ingo Molnar wrote: > > > Would be very nice to randomize the sampling rate, by randomizing the > > > intervals within a 1% range or so - perf tooling will probably recognize > > > the different weights. > > > > You're suggesting adding noise to the regular kernel tick? > > No, to the perf interval (which I assumed Mike was using to profile this?)
Yeah, perf top -F 250 exhibits the same inaccuracy as 250 Hz tick cpu accounting. (sufficient sample jitter should cure it, but I think I'd prefer to just live with it) -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
