On Thursday, March 12, 2015 01:17:39 PM Jacob Pan wrote: > On Wed, 11 Mar 2015 23:01:30 +0100 > "Rafael J. Wysocki" <[email protected]> wrote: > > > On Wednesday, March 11, 2015 05:55:09 AM Jacob Pan wrote: > > > The current driver assumes all RAPL domains within a CPU package > > > have the same energy unit. This is no longer true for HSW server > > > CPUs since DRAM domain has is own fixed energy unit which can be > > > different than the package energy unit enumerated by package > > > power MSR. In fact, the default HSW EP package power unit is 61uJ > > > whereas DRAM domain unit is 15.3uJ. The result is that DRAM power > > > consumption is counted 4x more than real power reported by energy > > > counters. > > > > > > This patch adds domain specific energy unit per cpu type, it allows > > > domain energy unit to override package energy unit if non zero. > > > > > > Signed-off-by: Jacob Pan <[email protected]> > > > > Should I regard this as a fix for 4.0? If so, should it also go to > > "stable" (and which "stable" series should it go to in that case)? > > > yes, it is a bug fix. I think this should be applied to all stable > kernels since RAPL driver was merged. So 3.10.71 and later.
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