From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
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, tglx@linutronix.de, rostedt@goodmis.org,
dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com,
fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com
Subject: Re: [PATCH RFC tip/core/rcu 1/9] rcu: Add call_rcu_tasks()
Date: Fri, 1 Aug 2014 08:16:42 -0700 [thread overview]
Message-ID: <20140801151641.GG4784@linux.vnet.ibm.com> (raw)
In-Reply-To: <1406861975.5319.5.camel@marge.simpson.net>
On Fri, Aug 01, 2014 at 04:59:35AM +0200, Mike Galbraith wrote:
> On Thu, 2014-07-31 at 09:38 -0700, Paul E. McKenney wrote:
>
> > Does building with CONFIG_NO_HZ_FULL_SYSIDLE=y slow things down even more?
> > If so, that would give me a rough idea of the cost of RCU's dyntick-idle
> > handling.
>
> Nope. Deltas are all down in the statistical frog hair.
OK, then I guess that trying to squeeze down RCU's dyntick-idle detection
won't be much help. Worth a thought, though, and thank you for running
the tests!
Thanx, Paul
next prev parent reply other threads:[~2014-08-02 6:49 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-28 22:55 [PATCH tip/core/rcu 0/9] RCU-tasks implementation Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 1/9] rcu: Add call_rcu_tasks() Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 2/9] rcu: Provide cond_resched_rcu_qs() to force quiescent states in long loops Paul E. McKenney
2014-07-29 7:55 ` Peter Zijlstra
2014-07-29 16:22 ` Paul E. McKenney
2014-07-29 17:25 ` Peter Zijlstra
2014-07-29 17:33 ` Paul E. McKenney
2014-07-29 17:36 ` Peter Zijlstra
2014-07-29 17:37 ` Peter Zijlstra
2014-07-29 17:55 ` Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 3/9] rcu: Add synchronous grace-period waiting for RCU-tasks Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 4/9] rcu: Export RCU-tasks APIs to GPL modules Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 5/9] rcutorture: Add torture tests for RCU-tasks Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 6/9] rcutorture: Add RCU-tasks test cases Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 7/9] rcu: Add stall-warning checks for RCU-tasks Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 8/9] rcu: Make RCU-tasks track exiting tasks Paul E. McKenney
2014-07-30 17:04 ` Oleg Nesterov
2014-07-30 18:24 ` Paul E. McKenney
2014-07-28 22:56 ` [PATCH RFC tip/core/rcu 9/9] rcu: Improve RCU-tasks energy efficiency Paul E. McKenney
2014-07-29 7:50 ` [PATCH RFC tip/core/rcu 1/9] rcu: Add call_rcu_tasks() Peter Zijlstra
2014-07-29 15:57 ` Paul E. McKenney
2014-07-29 16:07 ` Peter Zijlstra
2014-07-29 16:33 ` Paul E. McKenney
2014-07-29 17:31 ` Peter Zijlstra
2014-07-29 18:19 ` Paul E. McKenney
2014-07-29 19:25 ` Peter Zijlstra
2014-07-29 20:11 ` Paul E. McKenney
2014-07-29 8:12 ` Peter Zijlstra
2014-07-29 16:36 ` Paul E. McKenney
2014-07-29 8:12 ` Peter Zijlstra
2014-07-29 8:14 ` Peter Zijlstra
2014-07-29 17:23 ` Paul E. McKenney
2014-07-29 17:33 ` Peter Zijlstra
2014-07-29 18:06 ` Paul E. McKenney
2014-07-30 13:23 ` Mike Galbraith
2014-07-30 14:23 ` Paul E. McKenney
2014-07-31 7:37 ` Mike Galbraith
2014-07-31 16:38 ` Paul E. McKenney
2014-08-01 2:59 ` Mike Galbraith
2014-08-01 15:16 ` Paul E. McKenney [this message]
2014-07-30 6:52 ` Lai Jiangshan
2014-07-30 15:07 ` Paul E. McKenney
2014-07-30 13:41 ` Frederic Weisbecker
2014-07-30 16:10 ` Paul E. McKenney
2014-07-30 15:49 ` Oleg Nesterov
2014-07-30 16:08 ` Paul E. McKenney
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