€•=      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ8/translations/zh_CN/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ8/translations/zh_TW/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ8/translations/it_IT/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ8/translations/ja_JP/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ8/translations/ko_KR/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ8/translations/sp_SP/userspace-api/sysfs-platform_profile”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒEPlatform Profile Selection (e.g. /sys/firmware/acpi/platform_profile)”h]”hŒEPlatform Profile Selection (e.g. /sys/firmware/acpi/platform_profile)”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒR/var/lib/git/docbuild/linux/Documentation/userspace-api/sysfs-platform_profile.rst”h KubhŒ	paragraph”“”)”}”(hX+  On modern systems the platform performance, temperature, fan and other
hardware related characteristics are often dynamically configurable. The
platform configuration is often automatically adjusted to the current
conditions by some automatic mechanism (which may very well live outside
the kernel).”h]”hX+  On modern systems the platform performance, temperature, fan and other
hardware related characteristics are often dynamically configurable. The
platform configuration is often automatically adjusted to the current
conditions by some automatic mechanism (which may very well live outside
the kernel).”…””}”(hh¹hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒ¯These auto platform adjustment mechanisms often can be configured with
one of several platform profiles, with either a bias towards low power
operation or towards performance.”h]”hŒ¯These auto platform adjustment mechanisms often can be configured with
one of several platform profiles, with either a bias towards low power
operation or towards performance.”…””}”(hhÇhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒThe purpose of the platform_profile attribute is to offer a generic sysfs
API for selecting the platform profile of these automatic mechanisms.”h]”hŒThe purpose of the platform_profile attribute is to offer a generic sysfs
API for selecting the platform profile of these automatic mechanisms.”…””}”(hhÕhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒøNote that this API is only for selecting the platform profile, it is
NOT a goal of this API to allow monitoring the resulting performance
characteristics. Monitoring performance is best done with device/vendor
specific tools such as e.g. turbostat.”h]”hŒøNote that this API is only for selecting the platform profile, it is
NOT a goal of this API to allow monitoring the resulting performance
characteristics. Monitoring performance is best done with device/vendor
specific tools such as e.g. turbostat.”…””}”(hhãhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hX…  Specifically when selecting a high performance profile the actual achieved
performance may be limited by various factors such as: the heat generated
by other components, room temperature, free air flow at the bottom of a
laptop, etc. It is explicitly NOT a goal of this API to let userspace know
about any sub-optimal conditions which are impeding reaching the requested
performance level.”h]”hX…  Specifically when selecting a high performance profile the actual achieved
performance may be limited by various factors such as: the heat generated
by other components, room temperature, free air flow at the bottom of a
laptop, etc. It is explicitly NOT a goal of this API to let userspace know
about any sub-optimal conditions which are impeding reaching the requested
performance level.”…””}”(hhñhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hX”  Since numbers on their own cannot represent the multiple variables that a
profile will adjust (power consumption, heat generation, etc) this API
uses strings to describe the various profiles. To make sure that userspace
gets a consistent experience the sysfs-platform_profile ABI document defines
a fixed set of profile names. Drivers *must* map their internal profile
representation onto this fixed set.”h]”(hXO  Since numbers on their own cannot represent the multiple variables that a
profile will adjust (power consumption, heat generation, etc) this API
uses strings to describe the various profiles. To make sure that userspace
gets a consistent experience the sysfs-platform_profile ABI document defines
a fixed set of profile names. Drivers ”…””}”(hhÿhžhhŸNh NubhŒemphasis”“”)”}”(hŒ*must*”h]”hŒmust”…””}”(hj	  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hhÿubhŒ? map their internal profile
representation onto this fixed set.”…””}”(hhÿhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒ„If there is no good match when mapping then a new profile name may be
added. Drivers which wish to introduce new profile names must:”h]”hŒ„If there is no good match when mapping then a new profile name may be
added. Drivers which wish to introduce new profile names must:”…””}”(hj!  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K%hh£hžhubhŒblock_quote”“”)”}”(hŒÅ1. Explain why the existing profile names cannot be used.
2. Add the new profile name, along with a clear description of the
   expected behaviour, to the sysfs-platform_profile ABI documentation.
”h]”hŒenumerated_list”“”)”}”(hhh]”(hŒ	list_item”“”)”}”(hŒ6Explain why the existing profile names cannot be used.”h]”h¸)”}”(hj>  h]”hŒ6Explain why the existing profile names cannot be used.”…””}”(hj@  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K(hj<  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j:  hj7  ubj;  )”}”(hŒ…Add the new profile name, along with a clear description of the
expected behaviour, to the sysfs-platform_profile ABI documentation.
”h]”h¸)”}”(hŒ„Add the new profile name, along with a clear description of the
expected behaviour, to the sysfs-platform_profile ABI documentation.”h]”hŒ„Add the new profile name, along with a clear description of the
expected behaviour, to the sysfs-platform_profile ABI documentation.”…””}”(hjW  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K)hjS  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j:  hj7  ubeh}”(h]”h ]”h"]”h$]”h&]”Œenumtype”Œarabic”Œprefix”hŒsuffix”Œ.”uh1j5  hj1  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j/  hŸh¶h K(hh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒ"Custom" profile support”h]”hŒâ€œCustomâ€ profile support”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj|  hžhhŸh¶h K-ubh¸)”}”(hŒñThe platform_profile class also supports profiles advertising a "custom"
profile. This is intended to be set by drivers when the setttings in the
driver have been modified in a way that a standard profile doesn't represent
the current state.”h]”hŒ÷The platform_profile class also supports profiles advertising a â€œcustomâ€
profile. This is intended to be set by drivers when the setttings in the
driver have been modified in a way that a standard profile doesnâ€™t represent
the current state.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K.hj|  hžhubeh}”(h]”Œcustom-profile-support”ah ]”h"]”Œ"custom" profile support”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K-ubh¢)”}”(hhh]”(h§)”}”(hŒMultiple driver support”h]”hŒMultiple driver support”…””}”(hj¦  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj£  hžhhŸh¶h K4ubh¸)”}”(hŒØWhen multiple drivers on a system advertise a platform profile handler, the
platform profile handler core will only advertise the profiles that are
common between all drivers to the ``/sys/firmware/acpi`` interfaces.”h]”(hŒ¶When multiple drivers on a system advertise a platform profile handler, the
platform profile handler core will only advertise the profiles that are
common between all drivers to the ”…””}”(hj´  hžhhŸNh NubhŒliteral”“”)”}”(hŒ``/sys/firmware/acpi``”h]”hŒ/sys/firmware/acpi”…””}”(hj¾  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hj´  ubhŒ interfaces.”…””}”(hj´  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K5hj£  hžhubh¸)”}”(hŒqThis is to ensure there is no ambiguity on what the profile names mean when
all handlers don't support a profile.”h]”hŒsThis is to ensure there is no ambiguity on what the profile names mean when
all handlers donâ€™t support a profile.”…””}”(hjÖ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K9hj£  hžhubh¸)”}”(hŒ—Individual drivers will register a 'platform_profile' class device that has
similar semantics as the ``/sys/firmware/acpi/platform_profile`` interface.”h]”(hŒiIndividual drivers will register a â€˜platform_profileâ€™ class device that has
similar semantics as the ”…””}”(hjä  hžhhŸNh Nubj½  )”}”(hŒ'``/sys/firmware/acpi/platform_profile``”h]”hŒ#/sys/firmware/acpi/platform_profile”…””}”(hjì  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hjä  ubhŒ interface.”…””}”(hjä  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K<hj£  hžhubh¸)”}”(hŒ„To discover which driver is associated with a platform profile handler the
user can read the ``name`` attribute of the class device.”h]”(hŒ]To discover which driver is associated with a platform profile handler the
user can read the ”…””}”(hj  hžhhŸNh Nubj½  )”}”(hŒ``name``”h]”hŒname”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hj  ubhŒ attribute of the class device.”…””}”(hj  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K?hj£  hžhubh¸)”}”(hŒdTo discover available profiles from the class interface the user can read the
``choices`` attribute.”h]”(hŒNTo discover available profiles from the class interface the user can read the
”…””}”(hj$  hžhhŸNh Nubj½  )”}”(hŒ``choices``”h]”hŒchoices”…””}”(hj,  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hj$  ubhŒ attribute.”…””}”(hj$  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KBhj£  hžhubh¸)”}”(hŒIf a user wants to select a profile for a specific driver, they can do so
by writing to the ``profile`` attribute of the driver's class device.”h]”(hŒ\If a user wants to select a profile for a specific driver, they can do so
by writing to the ”…””}”(hjD  hžhhŸNh Nubj½  )”}”(hŒ``profile``”h]”hŒprofile”…””}”(hjL  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hjD  ubhŒ* attribute of the driverâ€™s class device.”…””}”(hjD  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KEhj£  hžhubh¸)”}”(hX  This will allow users to set different profiles for different drivers on the
same system. If the selected profile by individual drivers differs the
platform profile handler core will display the profile 'custom' to indicate
that the profiles are not the same.”h]”hX  This will allow users to set different profiles for different drivers on the
same system. If the selected profile by individual drivers differs the
platform profile handler core will display the profile â€˜customâ€™ to indicate
that the profiles are not the same.”…””}”(hjd  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KHhj£  hžhubh¸)”}”(hŒêWhile the ``platform_profile`` attribute has the value ``custom``, writing a
common profile from ``platform_profile_choices`` to the platform_profile
attribute of the platform profile handler core will set the profile for all
drivers.”h]”(hŒ
While the ”…””}”(hjr  hžhhŸNh Nubj½  )”}”(hŒ``platform_profile``”h]”hŒplatform_profile”…””}”(hjz  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hjr  ubhŒ attribute has the value ”…””}”(hjr  hžhhŸNh Nubj½  )”}”(hŒ
``custom``”h]”hŒcustom”…””}”(hjŒ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hjr  ubhŒ , writing a
common profile from ”…””}”(hjr  hžhhŸNh Nubj½  )”}”(hŒ``platform_profile_choices``”h]”hŒplatform_profile_choices”…””}”(hjž  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j¼  hjr  ubhŒm to the platform_profile
attribute of the platform profile handler core will set the profile for all
drivers.”…””}”(hjr  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KMhj£  hžhubeh}”(h]”Œmultiple-driver-support”ah ]”h"]”Œmultiple driver support”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K4ubeh}”(h]”ŒAplatform-profile-selection-e-g-sys-firmware-acpi-platform-profile”ah ]”h"]”ŒEplatform profile selection (e.g. /sys/firmware/acpi/platform_profile)”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
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