On Mon, 2011-11-28 at 12:03 +0300, Andrew Vagin wrote: > This tracepoint shows how long a task is sleeping in uninterruptible state. > > E.g. > It may show how long and where a mutex is waited.
Fair enough, makes one wonder how much it would take to make account_scheduler_latency() go away.. > Signed-off-by: Andrew Vagin <ava...@openvz.org> > --- > include/trace/events/sched.h | 7 +++++++ > kernel/sched_fair.c | 2 ++ > 2 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h > index 959ff18..be077cf 100644 > --- a/include/trace/events/sched.h > +++ b/include/trace/events/sched.h > @@ -331,6 +331,13 @@ DEFINE_EVENT(sched_stat_template, sched_stat_iowait, > TP_ARGS(tsk, delay)); > > /* > + * Tracepoint for accounting block time (time the task is in > uninterruptible). > + */ > +DEFINE_EVENT(sched_stat_template, sched_stat_block, > + TP_PROTO(struct task_struct *tsk, u64 delay), > + TP_ARGS(tsk, delay)); > + > +/* > * Tracepoint for accounting runtime (time the task is executing > * on a CPU). > */ > diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c > index 5c9e679..0d7b156 100644 > --- a/kernel/sched_fair.c > +++ b/kernel/sched_fair.c > @@ -907,6 +907,8 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct > sched_entity *se) > trace_sched_stat_iowait(tsk, delta); > } > > + trace_sched_stat_block(tsk, delta); > + > /* > * Blocking time is in units of nanosecs, so shift by > * 20 to get a milliseconds-range estimation of the _______________________________________________ Devel mailing list Devel@openvz.org https://openvz.org/mailman/listinfo/devel
