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Date: Wed, 03 Mar 2010 09:55:38 -0800 From: "Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com> To: Matthew Garrett <mjg@...hat.com> Cc: Ingo Molnar <mingo@...e.hu>, H Peter Anvin <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Len Brown <lenb@...nel.org>, Dave Jones <davej@...hat.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org> Subject: Re: [patch 2/2] x86: Manage ENERGY_PERF_BIAS based on cpufreq governor On Wed, 2010-03-03 at 08:40 -0800, Matthew Garrett wrote: > Have you done any measurements with this bit being set dynamically by > ondemand depending on the target frequency? > The not so good part about this feature is that its setting is opaque. Different CPUs can use this value for different optimizations. So, in future we may have to change the value of this MSR based on frequency or other metrics. But, for CPUs which support this MSR today, changing the value with frequency do not make any difference. Thanks, Venki -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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