On Tue, Jun 07, 2011 at 05:55:03PM -0600, David Ahern wrote: > Trace points in timekeeping.c where xtime is modified by a user > or ntp. > > Signed-off-by: David Ahern <[email protected]> > --- > include/trace/events/timekeeping.h | 43 > ++++++++++++++++++++++++++++++++++++ > kernel/time/timekeeping.c | 8 ++++++ > 2 files changed, 51 insertions(+), 0 deletions(-) > create mode 100644 include/trace/events/timekeeping.h > > diff --git a/include/trace/events/timekeeping.h > b/include/trace/events/timekeeping.h > new file mode 100644 > index 0000000..3d5d083 > --- /dev/null > +++ b/include/trace/events/timekeeping.h > @@ -0,0 +1,43 @@ > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM timekeeping > + > +#if !defined(_TRACE_TIMEKEEP_H) || defined(TRACE_HEADER_MULTI_READ) > +#define _TRACE_TIMEKEEP_H > + > +#include <linux/tracepoint.h> > +#include <linux/time.h> > + > +DECLARE_EVENT_CLASS(tod_template, > + > + TP_PROTO(const struct timespec *tv), > + > + TP_ARGS(tv), > + > + TP_STRUCT__entry( > + __field( __kernel_time_t, tv_sec) > + __field( long, tv_nsec) > + ), > + > + TP_fast_assign( > + __entry->tv_sec = tv->tv_sec; > + __entry->tv_nsec = tv->tv_nsec; > + ), > + > + TP_printk("tv_sec=%ld tv_nsec=%ld", __entry->tv_sec, __entry->tv_nsec) > +); > + > +DEFINE_EVENT(tod_template, settimeofday, > + TP_PROTO(const struct timespec *tv), > + TP_ARGS(tv)); > + > +DEFINE_EVENT(tod_template, timekeeping_inject_offset, > + TP_PROTO(const struct timespec *tv), > + TP_ARGS(tv)); > + > +DEFINE_EVENT(tod_template, timekeeping_inject_sleeptime, > + TP_PROTO(const struct timespec *tv), > + TP_ARGS(tv));
Does the fact it's any of the three way of updating xtime make any difference from the user point of view? If not can we rather factorize that in a single settimeofday tracepoint? Or update_time_of_day if we don't want to confuse the user with the syscall. -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
