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From: Frederic Weisbecker <fweisbec@gmail.com>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Alessio Igor Bogani <abogani@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Avi Kivity <avi@redhat.com>, Chris Metcalf <cmetcalf@tilera.com>,
	Christoph Lameter <cl@linux.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Geoff Levand <geoff@infradead.org>,
	Gilad Ben Yossef <gilad@benyossef.com>,
	Hakan Akkan <hakanakkan@gmail.com>, Kevin Hilman <khilman@ti.com>,
	Max Krasnyansky <maxk@qualcomm.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Stephen Hemminger <shemminger@vyatta.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Sven-Thorsten Dietrich <thebigcorporation@gmail.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	"Luck,Tony" <tony.luck@intel.com>
Subject: Re: [RFC GIT PULL] nohz: Basic cputime accounting for adaptive tickless
Date: Thu, 14 Jun 2012 15:04:29 +0200	[thread overview]
Message-ID: <20120614130425.GC16848@somewhere> (raw)
In-Reply-To: <20120614144815.1401af49@de.ibm.com>

On Thu, Jun 14, 2012 at 02:48:15PM +0200, Martin Schwidefsky wrote:
> On Thu, 14 Jun 2012 13:22:45 +0200
> Frederic Weisbecker <fweisbec@gmail.com> wrote:
> 
> > On Thu, Jun 14, 2012 at 01:21:23PM +0200, Thomas Gleixner wrote:
> > > On Thu, 14 Jun 2012, Ingo Molnar wrote:
> > > > * Frederic Weisbecker <fweisbec@gmail.com> wrote:
> > > > > You're right, I should have looked into CONFIG_VIRT_CPU_ACCOUNTING sooner
> > > > > and see if I can reuse it.
> > > > > 
> > > > > I'll try something with that.
> > > > 
> > > > Maybe sanitize all the variants under a single set of 
> > > > wrappers/callbacks?
> > > 
> > > Yes, please!
> > 
> > Sure, I'm working in it.
>  
> Please keep me in the loop, I want to avoid that things break on s390. Thanks.

Well, I realize I can't consolidate much between ia64, s390 and ppc because they
all handle virtual cpu time accounting very differently. I'm also not what the
virtual timer is for.

Also it seems only powerpc flushes the time when a task is descheduled. May be
I'm missing something.

  reply	other threads:[~2012-06-14 13:04 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-13 16:19 [RFC GIT PULL] nohz: Basic cputime accounting for adaptive tickless Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 1/7] nohz: Add more comment about CONFIG_NO_HZ Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 2/7] nohz: Introduce adaptive nohz config Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 3/7] nohz: Generalize tickless cpu time accounting Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 4/7] nohz: Account user and system times in adaptive nohz mode Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 5/7] x86: Syscall hooks for " Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 6/7] x86: Add adaptive tickless hooks on do_notify_resume() Frederic Weisbecker
2012-06-13 16:19 ` [PATCH 7/7] x86: Exception hooks for adaptive tickless Frederic Weisbecker
2012-06-13 16:35 ` [RFC GIT PULL] nohz: Basic cputime accounting " Frederic Weisbecker
2012-06-14  9:07 ` Peter Zijlstra
2012-06-14  9:10   ` Peter Zijlstra
2012-06-14 11:12   ` Frederic Weisbecker
2012-06-14 11:16     ` Ingo Molnar
2012-06-14 11:21       ` Thomas Gleixner
2012-06-14 11:22         ` Frederic Weisbecker
2012-06-14 12:48           ` Martin Schwidefsky
2012-06-14 13:04             ` Frederic Weisbecker [this message]
2012-06-14 14:36               ` Ingo Molnar
2012-06-14 17:34                 ` Frederic Weisbecker
2012-06-15 12:13                   ` Ingo Molnar
2012-06-14 13:42             ` Frederic Weisbecker
2012-06-14 15:18               ` Martin Schwidefsky
2012-06-15 17:37                 ` Frederic Weisbecker
2012-06-18 10:46                   ` Martin Schwidefsky

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