From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: paulmck@linux.vnet.ibm.com
Cc: Arjan van de Ven <arjan@linux.intel.com>,
Linux PM <linux-pm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Rafael Wysocki <rafael.j.wysocki@intel.com>,
Len Brown <len.brown@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
Zhang Rui <rui.zhang@intel.com>, Rob Landley <rob@landley.net>
Subject: Re: [PATCH 3/3] PM: Introduce Intel PowerClamp Driver
Date: Tue, 13 Nov 2012 17:24:49 -0800 [thread overview]
Message-ID: <20121113172449.0f7b1754@chromoly> (raw)
In-Reply-To: <20121114000259.GK2489@linux.vnet.ibm.com>
On Tue, 13 Nov 2012 16:03:00 -0800
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:
> Just to make sure I am really understanding what is happening, let's
> suppose we have a HZ=1000 system that has a few tasks that
> occasionally run at prio 99. These tasks would run during the clamp
> interval, but would (for example) see the jiffies counter remaining
> at the value at the beginning of the clamp interval until the end of
> that interval, when the jiffies counter would suddenly jump by roughly
> six counts, right?
Yes, if there is no interrupts disturb the clamping duration.
We do not mask interrupts which will update jiffies.
--
Thanks,
Jacob
next prev parent reply other threads:[~2012-11-14 1:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-12 22:03 [PATCH 0/3] pm: Intel powerclamp driver Jacob Pan
2012-11-12 22:03 ` [PATCH 1/3] tick: export nohz tick idle symbols for module use Jacob Pan
2012-11-12 22:03 ` [PATCH 2/3] x86/nmi: export local_touch_nmi() symbol for modules Jacob Pan
2012-11-12 22:03 ` [PATCH 3/3] PM: Introduce Intel PowerClamp Driver Jacob Pan
2012-11-13 6:33 ` Joe Perches
2012-11-13 6:55 ` Jacob Pan
2012-11-13 21:16 ` Paul E. McKenney
2012-11-13 21:39 ` Jacob Pan
2012-11-13 22:23 ` Paul E. McKenney
2012-11-13 22:45 ` Arjan van de Ven
2012-11-13 23:02 ` Rafael J. Wysocki
2012-11-14 0:03 ` Paul E. McKenney
2012-11-14 0:03 ` Paul E. McKenney
2012-11-14 0:08 ` Arjan van de Ven
2012-11-14 1:14 ` Jacob Pan
2012-11-14 1:34 ` Paul E. McKenney
2012-11-14 2:59 ` Arjan van de Ven
2012-11-15 3:22 ` Paul E. McKenney
2012-11-14 1:24 ` Jacob Pan [this message]
2012-11-13 21:56 ` Arjan van de Ven
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