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Groups > linux.kernel > #1289978

[PATCH 0/2] combine remote cpu msr access

From Jacob Pan <jacob.jun.pan@linux.intel.com>
Newsgroups linux.kernel
Subject [PATCH 0/2] combine remote cpu msr access
Date 2015-12-11 23:50 +0100
Message-ID <qEEFI-29G-15@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

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IPI calls to access MSRs on remote CPUs are expensive. So add a lib call
for read/modify/write access and use it in Intel RAPL driver.

Jacob Pan (2):
  x86/msr: add on cpu read/modify/write function
  powercap/rapl: reduce ipi calls

 arch/x86/include/asm/msr.h    | 24 +++++++++++++++
 arch/x86/lib/msr-smp.c        | 47 ++++++++++++++++++++++++++++
 drivers/powercap/intel_rapl.c | 71 ++++++++++++++++++++++---------------------
 3 files changed, 108 insertions(+), 34 deletions(-)

-- 
1.9.1

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Thread

[PATCH 0/2] combine remote cpu msr access Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-11 23:50 +0100
  [PATCH 2/2] powercap/rapl: reduce ipi calls Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-11 23:50 +0100
  [PATCH 1/2] x86/msr: add on cpu read/modify/write function Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-11 23:50 +0100
    Re: [PATCH 1/2] x86/msr: add on cpu read/modify/write function Thomas Gleixner <tglx@linutronix.de> - 2015-12-20 14:40 +0100
      Re: [PATCH 1/2] x86/msr: add on cpu read/modify/write function Borislav Petkov <bp@alien8.de> - 2015-12-20 16:30 +0100

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