From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: LKML <linux-kernel@vger.kernel.org>,
Linux PM <linux-pm@vger.kernel.org>,
Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
X86 Kernel <x86@kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH 0/2] combine remote cpu msr access
Date: Fri, 11 Dec 2015 14:40:35 -0800 [thread overview]
Message-ID: <1449873637-24300-1-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
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
next reply other threads:[~2015-12-11 22:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-11 22:40 Jacob Pan [this message]
2015-12-11 22:40 ` [PATCH 1/2] x86/msr: add on cpu read/modify/write function Jacob Pan
2015-12-20 13:28 ` Thomas Gleixner
2015-12-20 15:27 ` Borislav Petkov
2016-01-13 1:14 ` Jacob Pan
2015-12-11 22:40 ` [PATCH 2/2] powercap/rapl: reduce ipi calls Jacob Pan
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