From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: linux-pm@vger.kernel.org, gregkh@linuxfoundation.org,
len.brown@intel.com, rjw@sisk.pl, arjan@linux.intel.com,
jacob.jun.pan@linux.intel.com,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH v2 0/6] Power Capping Framework and RAPL Driver
Date: Fri, 4 Oct 2013 09:36:50 -0700 [thread overview]
Message-ID: <1380904616-17519-1-git-send-email-srinivas.pandruvada@linux.intel.com> (raw)
Overview
With the evolution of technologies, which enables power monitoring and limiting,
more and more devices are able to constrain their power consumption under certain
limits. There are several use cases for such technologies:
- Power monitoring: Each device can report its power consumption.
- Power Limiting: Setting power limits on the devices allows users to guard against
platform reaching max system power level.
- Maximize performance: While staying below a power limit, it allows devices to
automatically adjust performance to meet demands
- Dynamic control and re-budgeting: If each device can be constrained to some power,
extra power can redistributed to other devices, which needs additional performance.
One such example of technologies is RAPL (Running Average Power Limit) mechanism
available in the latest Intel processors. Intel is slowly adding many devices under
RAPL control. Also there are other technologies available, for power capping various
devices. Soon it is very likely that other vendors are also adding or considering
such implementation.
Power Capping framework is an effort to have a uniform interface available to Linux
drivers, which will enable
- A uniform sysfs interface for all devices which can offer power capping
- A common API for drivers, which will avoid code duplication and easy
implementation of client drivers.
Also submitting Intel RAPL driver using power capping framework.
History:
v2
As suggested, added BIT_ULL_MASK and BIT_ULL_WORD
v1
Incorporated changes suggested during RFC stage
Jacob Pan (2):
x86/msr: add 64bit _on_cpu access functions
Introduce Intel RAPL power capping driver
Srinivas Pandruvada (4):
PowerCap: Documentation
PowerCap: Add class driver
PowerCap: Added to drivers build
bitops: Introduce BIT_ULL
Documentation/ABI/testing/sysfs-class-powercap | 152 +++
Documentation/power/powercap/powercap.txt | 236 ++++
arch/x86/include/asm/msr.h | 22 +
arch/x86/lib/msr-smp.c | 62 ++
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/powercap/Kconfig | 31 +
drivers/powercap/Makefile | 2 +
drivers/powercap/intel_rapl.c | 1395 ++++++++++++++++++++++++
drivers/powercap/powercap_sys.c | 699 ++++++++++++
include/linux/bitops.h | 3 +
include/linux/powercap.h | 325 ++++++
12 files changed, 2930 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-class-powercap
create mode 100644 Documentation/power/powercap/powercap.txt
create mode 100644 drivers/powercap/Kconfig
create mode 100644 drivers/powercap/Makefile
create mode 100644 drivers/powercap/intel_rapl.c
create mode 100644 drivers/powercap/powercap_sys.c
create mode 100644 include/linux/powercap.h
--
1.8.3.1
next reply other threads:[~2013-10-04 16:36 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-04 16:36 Srinivas Pandruvada [this message]
2013-10-04 16:36 ` [PATCH v2 1/6] PowerCap: Documentation Srinivas Pandruvada
2013-10-04 16:36 ` [PATCH v2 2/6] PowerCap: Add class driver Srinivas Pandruvada
2013-10-04 16:51 ` Greg KH
2013-10-04 20:06 ` Srinivas Pandruvada
2013-10-04 16:36 ` [PATCH v2 3/6] PowerCap: Added to drivers build Srinivas Pandruvada
2013-10-04 19:24 ` Gene Heskett
2013-10-04 19:38 ` Srinivas Pandruvada
[not found] ` <201310041622.29259.gheskett@wdtv.com>
2013-10-04 20:55 ` Srinivas Pandruvada
2013-10-04 23:17 ` Gene Heskett
2013-10-06 15:50 ` Arjan van de Ven
2013-10-06 20:15 ` Gene Heskett
2013-10-07 15:46 ` Arjan van de Ven
2013-10-04 16:36 ` [PATCH v2 4/6] x86/msr: add 64bit _on_cpu access functions Srinivas Pandruvada
2013-10-04 16:36 ` [PATCH v2 5/6] bitops: Introduce BIT_ULL Srinivas Pandruvada
2013-10-04 16:36 ` [PATCH v2 6/6] Introduce Intel RAPL power capping driver Srinivas Pandruvada
2013-10-04 18:07 ` Joe Perches
2013-10-04 20:12 ` Jacob Pan
2013-10-04 22:14 ` Joe Perches
2013-10-04 23:25 ` Jacob Pan
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