Re: Does LTT code exclusively use hrtimers ?
Mathieu Desnoyers <[email protected]> Tue, 4 Sep 2007 07:37:43 -0400
| Newsgroups | gmane.linux.kernel.tracing |
|---|---|
| Message-ID | <20070904113743.GD14618@Krystal> |
* Godbole, Lalita ([email protected]) wrote: > > Does the lttng code (for linux kernel 2.6.20) exclusively use hrtimers > api ? Or can this be optionally configured? > Nope, we don't use it at all. We use the cycle counter directly, or the most precise clock available. We fall back on a self-contained logical clock if needed. It gives use the event order, and then the kernel_timer_update_time happening at the timer interrupt can be used to have an idea of the time passing. Mathieu > Thanks > Lalita Godbole > > > _______________________________________________ > Ltt-dev mailing list > [email protected] > http://listserv.shafik.org/mailman/listinfo/ltt-dev -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68