forked from Minki/linux
9de8d68695
RAPL is a per package facility and we already have a mechanism for a dedicated per package reader. So there is no point to have multiple CPUs doing the same. The current implementation actually starts two timers on two CPUs if one does: perf stat -C1,2 -e -e power/energy-pkg .... which makes the whole concept of 1 reader per package moot. What's worse is that the above returns the double of the actual energy consumption, but that's a different problem to address and cannot be solved by removing the pointless per cpuness of that mechanism. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Harish Chegondi <harish.chegondi@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20160222221012.845369524@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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