From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Christoph Lameter <cl@linux.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Clark Williams <clark.williams@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Li Zefan <lizf@cn.fujitsu.com>, Ingo Molnar <mingo@kernel.org>,
Mike Galbraith <efault@gmx.de>
Subject: Re: [PATCH 00/32] [RFC] nohz/cpuset: Start discussions on nohz CPUs
Date: Fri, 2 Nov 2012 13:41:57 -0700 [thread overview]
Message-ID: <20121102204157.GE3027@linux.vnet.ibm.com> (raw)
In-Reply-To: <0000013ac2c4f47a-d21f2685-6660-4d02-872d-581d203285a0-000000@email.amazonses.com>
On Fri, Nov 02, 2012 at 08:16:58PM +0000, Christoph Lameter wrote:
> On Fri, 2 Nov 2012, Paul E. McKenney wrote:
>
> > So I believe that these need to be controlled separately for the immediate
> > future.
>
> Yes they do but the configurations are similar and it would be best if
> these were cpumasks in standard locations instead of being specified at
> boot time or in a cpuset.
>
> Put the cpu masks into
>
> /sys/devices/system/cpu/{nohz_cpus,rcu_cpus}
>
> or so?
The no-CBs mask would be read-only for some time -- changed only at
boot. Longer term, I hope to allow run-time modification, but...
Thanx, Paul
next prev parent reply other threads:[~2012-11-02 20:42 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-29 20:27 [PATCH 00/32] [RFC] nohz/cpuset: Start discussions on nohz CPUs Steven Rostedt
2012-10-29 20:27 ` [PATCH 01/32] nohz: Move nohz load balancer selection into idle logic Steven Rostedt
2012-10-30 8:32 ` Charles Wang
2012-10-30 15:39 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 02/32] cpuset: Set up interface for nohz flag Steven Rostedt
2012-10-30 17:16 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 03/32] nohz: Try not to give the timekeeping duty to an adaptive tickless cpu Steven Rostedt
2012-10-30 17:33 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 04/32] x86: New cpuset nohz irq vector Steven Rostedt
2012-10-30 17:39 ` Steven Rostedt
2012-10-30 23:51 ` Frederic Weisbecker
2012-10-31 0:07 ` Steven Rostedt
2012-10-31 0:45 ` Frederic Weisbecker
2012-10-29 20:27 ` [PATCH 05/32] nohz: Adaptive tick stop and restart on nohz cpuset Steven Rostedt
2012-10-30 18:23 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 06/32] nohz/cpuset: Dont turn off the tick if rcu needs it Steven Rostedt
2012-10-30 18:30 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 07/32] nohz/cpuset: Wake up adaptive nohz CPU when a timer gets enqueued Steven Rostedt
2012-10-29 20:27 ` [PATCH 08/32] nohz/cpuset: Dont stop the tick if posix cpu timers are running Steven Rostedt
2012-10-29 20:27 ` [PATCH 09/32] nohz/cpuset: Restart tick when nohz flag is cleared on cpuset Steven Rostedt
2012-10-30 18:55 ` Steven Rostedt
2012-10-29 20:27 ` [PATCH 10/32] nohz/cpuset: Restart the tick if printk needs it Steven Rostedt
2012-10-30 19:01 ` Steven Rostedt
2012-10-30 23:54 ` Frederic Weisbecker
2012-10-29 20:27 ` [PATCH 11/32] rcu: Restart the tick on non-responding adaptive nohz CPUs Steven Rostedt
2012-10-29 20:27 ` [PATCH 12/32] rcu: Restart tick if we enqueue a callback in a nohz/cpuset CPU Steven Rostedt
2012-10-29 20:27 ` [PATCH 13/32] nohz: Generalize tickless cpu time accounting Steven Rostedt
2012-10-29 20:27 ` [PATCH 14/32] nohz/cpuset: Account user and system times in adaptive nohz mode Steven Rostedt
2012-10-29 20:27 ` [PATCH 15/32] nohz/cpuset: New API to flush cputimes on nohz cpusets Steven Rostedt
2012-10-29 20:27 ` [PATCH 16/32] nohz/cpuset: Flush cputime on threads in nohz cpusets when waiting leader Steven Rostedt
2012-10-29 20:27 ` [PATCH 17/32] nohz/cpuset: Flush cputimes on procfs stat file read Steven Rostedt
2012-10-29 20:27 ` [PATCH 18/32] nohz/cpuset: Flush cputimes for getrusage() and times() syscalls Steven Rostedt
2012-10-29 20:27 ` [PATCH 19/32] x86: Syscall hooks for nohz cpusets Steven Rostedt
2012-10-29 20:27 ` [PATCH 20/32] nohz/cpuset: enable addition&removal of cpus while in adaptive nohz mode Steven Rostedt
2012-10-29 20:27 ` [PATCH 21/32] nohz: Dont restart the tick before scheduling to idle Steven Rostedt
2012-10-29 20:27 ` [PATCH 22/32] sched: Comment on rq->clock correctness in ttwu_do_wakeup() in nohz Steven Rostedt
2012-10-29 20:27 ` [PATCH 23/32] sched: Update rq clock on nohz CPU before migrating tasks Steven Rostedt
2012-10-29 20:27 ` [PATCH 24/32] sched: Update rq clock on nohz CPU before setting fair group shares Steven Rostedt
2012-10-29 20:27 ` [PATCH 25/32] sched: Update rq clock on tickless CPUs before calling check_preempt_curr() Steven Rostedt
2012-10-29 20:27 ` [PATCH 26/32] sched: Update rq clock earlier in unthrottle_cfs_rq Steven Rostedt
2012-10-29 20:27 ` [PATCH 27/32] sched: Update clock of nohz busiest rq before balancing Steven Rostedt
2012-10-29 20:27 ` [PATCH 28/32] sched: Update rq clock before idle balancing Steven Rostedt
2012-10-29 20:27 ` [PATCH 29/32] sched: Update nohz rq clock before searching busiest group on load balancing Steven Rostedt
2012-10-29 20:27 ` [PATCH 30/32] rcu: Switch to extended quiescent state in userspace from nohz cpuset Steven Rostedt
2012-10-29 20:27 ` [PATCH 31/32] nohz/cpuset: Disable under some configs Steven Rostedt
2012-10-29 20:27 ` [PATCH 32/32] nohz, not for merge: Add tickless tracing Steven Rostedt
2012-10-30 14:02 ` [PATCH 00/32] [RFC] nohz/cpuset: Start discussions on nohz CPUs Gilad Ben-Yossef
2012-11-02 14:23 ` Christoph Lameter
2012-11-02 14:37 ` Steven Rostedt
2012-11-02 14:50 ` David Nyström
2012-11-02 15:03 ` Christoph Lameter
2012-11-02 15:14 ` Steven Rostedt
2012-11-02 18:35 ` Paul E. McKenney
2012-11-02 20:16 ` Christoph Lameter
2012-11-02 20:41 ` Paul E. McKenney [this message]
2012-11-02 20:51 ` Steven Rostedt
2012-11-03 2:08 ` Paul E. McKenney
2012-11-05 15:17 ` Christoph Lameter
2012-11-05 22:41 ` Frederic Weisbecker
2012-11-05 22:32 ` Frederic Weisbecker
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121102204157.GE3027@linux.vnet.ibm.com \
--to=paulmck@linux.vnet.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=cl@linux.com \
--cc=clark.williams@gmail.com \
--cc=efault@gmx.de \
--cc=fweisbec@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lizf@cn.fujitsu.com \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).