Messages in this thread | | | Date | Wed, 7 Aug 2013 09:42:00 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH 7/8] rcu: add # of deferred _special() statistics |
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On Wed, Aug 07, 2013 at 06:25:03PM +0800, Lai Jiangshan wrote: > Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> > --- > kernel/rcutree.h | 1 + > kernel/rcutree_plugin.h | 1 + > kernel/rcutree_trace.c | 1 + > 3 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/kernel/rcutree.h b/kernel/rcutree.h > index 4a39d36..a5e9643 100644 > --- a/kernel/rcutree.h > +++ b/kernel/rcutree.h > @@ -290,6 +290,7 @@ struct rcu_data { > unsigned long n_force_qs_snap; > /* did other CPU force QS recently? */ > long blimit; /* Upper limit on a processed batch */ > + unsigned long n_defer_special;/* # of deferred _special() */ > > /* 3) dynticks interface. */ > struct rcu_dynticks *dynticks; /* Shared per-CPU dynticks state. */ > diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h > index c9ff9f1..d828eec 100644 > --- a/kernel/rcutree_plugin.h > +++ b/kernel/rcutree_plugin.h > @@ -396,6 +396,7 @@ void rcu_read_unlock_special(struct task_struct *t, bool unlock) > * is still unlikey to be true. > */ > if (unlikely(unlock && irqs_disabled_flags(flags))) { > + this_cpu_ptr(&rcu_preempt_data)->n_defer_special++; > set_need_resched(); > local_irq_restore(flags); > return; > diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c > index cf6c174..17d8b2c 100644 > --- a/kernel/rcutree_trace.c > +++ b/kernel/rcutree_trace.c > @@ -149,6 +149,7 @@ static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) > seq_printf(m, " ci=%lu nci=%lu co=%lu ca=%lu\n",
The above "\n" needs to be removed. (Fixed while queueing.)
Thanx, Paul
> rdp->n_cbs_invoked, rdp->n_nocbs_invoked, > rdp->n_cbs_orphaned, rdp->n_cbs_adopted); > + seq_printf(m, " ds=%lu\n", rdp->n_defer_special); > } > > static int show_rcudata(struct seq_file *m, void *v) > -- > 1.7.4.4 >
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