From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org,
laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com,
edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
sbw@mit.edu
Subject: Re: [PATCH tip/core/timers 3/4] timers: Reduce future __run_timers() latency for newly emptied list
Date: Wed, 15 Jan 2014 18:23:32 -0800 [thread overview]
Message-ID: <20140116022332.GQ10038@linux.vnet.ibm.com> (raw)
In-Reply-To: <20140115170835.GC11499@redhat.com>
On Wed, Jan 15, 2014 at 06:08:35PM +0100, Oleg Nesterov wrote:
> On 01/14, Paul E. McKenney wrote:
> >
> > @@ -700,6 +700,7 @@ static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
> > base->next_timer = base->timer_jiffies;
> > }
> > base->all_timers--;
> > + (void)catchup_timer_jiffies(base);
>
> Agreed, but I think that detach_expired_timer() should do the same,
> this can stop main loop in __run_timers().
Good point, added to detach_expired_timer().
Thanx, Paul
next prev parent reply other threads:[~2014-01-16 2:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 5:19 [PATCH v2 tip/core/timers] Crude timer-wheel latency hacks Paul E. McKenney
2014-01-15 5:20 ` [PATCH tip/core/timers 1/4] timers: Track total number of timers in list Paul E. McKenney
2014-01-15 5:20 ` [PATCH tip/core/timers 2/4] timers: Reduce __run_timers() latency for empty list Paul E. McKenney
2014-01-15 17:03 ` Oleg Nesterov
2014-01-15 17:10 ` Peter Zijlstra
2014-01-16 2:14 ` Paul E. McKenney
2014-01-15 17:38 ` Oleg Nesterov
2014-01-15 20:32 ` Josh Triplett
2014-01-15 20:47 ` Steven Rostedt
2014-01-16 2:22 ` Paul E. McKenney
2014-01-15 20:33 ` Josh Triplett
2014-01-16 2:23 ` Paul E. McKenney
2014-01-15 5:20 ` [PATCH tip/core/timers 3/4] timers: Reduce future __run_timers() latency for newly emptied list Paul E. McKenney
2014-01-15 17:08 ` Oleg Nesterov
2014-01-16 2:23 ` Paul E. McKenney [this message]
2014-01-15 20:54 ` Steven Rostedt
2014-01-15 23:41 ` Paul E. McKenney
2014-01-15 5:20 ` [PATCH tip/core/timers 4/4] timers: Reduce future __run_timers() latency for first add to empty list Paul E. McKenney
2014-01-15 17:24 ` Oleg Nesterov
2014-01-15 17:31 ` [PATCH 0/1] timers: internal_add_timer() should update ->next_timer if ->active_timers == 0 Oleg Nesterov
2014-01-15 17:31 ` [PATCH 1/1] " Oleg Nesterov
2014-01-15 20:56 ` Steven Rostedt
2014-01-16 2:10 ` Paul E. McKenney
2014-01-16 2:33 ` [PATCH tip/core/timers 4/4] timers: Reduce future __run_timers() latency for first add to empty list Paul E. McKenney
2014-01-15 22:22 ` [PATCH v2 tip/core/timers] Crude timer-wheel latency hacks Thomas Gleixner
2014-01-16 2:36 ` Paul E. McKenney
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