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Date: Tue, 19 Jan 2016 13:06:05 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Arjan van de Ven <arjan@linux.intel.com>,
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        LKML <linux-kernel@vger.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Len Brown <len.brown@intel.com>,
        Rafael Wysocki <rafael.j.wysocki@intel.com>,
        Eduardo Valentin <edubezval@gmail.com>, Paul Turner <pjt@google.com>
Subject: Re: [PATCH 3/4] sched: introduce synchronized idle injection
Message-ID: <20160119120605.GA26634@gmail.com>
References: <20151118154457.GD30184@e105550-lin.cambridge.arm.com>
 <564C9E93.8030901@linux.intel.com>
 <20151119172405.GA798@e105550-lin.cambridge.arm.com>
 <20151119200906.GS3816@twins.programming.kicks-ass.net>
 <alpine.DEB.2.11.1511201032300.3989@nanos>
 <20151120102014.GC17308@twins.programming.kicks-ass.net>
 <alpine.DEB.2.11.1511201150480.3989@nanos>
 <20151120125441.GD17308@twins.programming.kicks-ass.net>
 <alpine.DEB.2.11.1511201418580.3989@nanos>
 <20160111135005.49f38a45@icelake>
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* Jacob Pan <jacob.jun.pan@linux.intel.com> wrote:

> Note: PPW_RAPL= performance per watt measured by RAPL package power
> meter.
> 
> If we just look at 20% forced idle, I can see significantly more deep
> package C-states(PC7) residency.
> 		Pkg%pc2 	Pkg%pc6 	Pkg%pc7 
> w/o patch	3.17		4.39   		13.21 
> w/ patch	1.15   		1.43            17.24 

Can this be translated to: "this patch improved power efficiency (watts per 
second) by XYZ percent?", with XYZ filled in accordingly?

Thanks,

	Ingo