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Subject: Re: [RFC][PATCH 13/19] perf: Per cpu-context rotation timer
From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: paulus <paulus@samba.org>, stephane eranian <eranian@googlemail.com>,
        Robert Richter <robert.richter@amd.com>,
        Will Deacon <will.deacon@arm.com>, Paul Mundt <lethal@linux-sh.org>,
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        Cyrill Gorcunov <gorcunov@gmail.com>, Lin Ming <ming.m.lin@intel.com>,
        Yanmin <yanmin_zhang@linux.intel.com>,
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        David Miller <davem@davemloft.net>, Ingo Molnar <mingo@elte.hu>,
        linux-kernel@vger.kernel.org,
        Corey Ashford <cjashfor@linux.vnet.ibm.com>
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Date: Wed, 08 Sep 2010 15:56:17 +0200
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On Wed, 2010-09-08 at 15:50 +0200, Thomas Gleixner wrote:
> > Because some people (Corey) want to be able to have different rotation
> > periods per pmu driver, so a timer per context was the easy way out.
> 
> Makes sense. If you want it fully aligned with the tick, then you just
> might get the real tick time from the tick code and make it proper
> aligned. 

Right, I'll go see if I can make that work nicely.