TUNED_ADM(8)							       tuned							      TUNED_ADM(8)

NAME

       tuned-adm - commandline tool for switching between different tuning profiles

SYNOPSIS

       tuned-adm [ list , active , profile <profile> , off ]

DESCRIPTION

       This  command  line utility allows user to switch between user definable tuning profiles. Several predefined profiles are already included.
       You can even create your own profile, either based on one of the existing ones by copying it or make a completely new one. The distribution
       provided  profiles  are	stored in subdirectories below /usr/lib/tuned and the user defined profiles in subdirectories below /etc/tuned. If
       there are same profiles on both places, user defined profiles have precedence.

       The power saving profiles contain settings that are typically not enabled by default as they will noticeably impact the latency/performance
       of  your  system  as opposed to the power saving mechanisms that are enabled by default. On the other hand the performance profiles disable
       the additional power saving mechanisms of tuned as they would negatively impact throughput or latency.

OPTIONS

       list   List all available profiles.

       active Show current active profile.

       profile <profile>
	      Switches to the given profilename. If none is given or no valid one is given the command gracefully  exits  without  performing  any
	      operation.

       recommend
	      Recommend  profile  suitable  for  your  system.	Currently  only  static detection is implemented - it decides according to data in
	      /etc/system-release-cpe and virt-what output. The rules for autodetection are defined in recommend.conf in profile  directory.  They
	      can  be  overriden by user by putting the recommend.conf into /etc/tuned. The default rules recommends profiles targeted to the best
	      performance or balanced profile if unsure.

       off    Switch off tuned.

PREDEFINED PROFILES

       At the moment we're providing the following pre defined profiles:

       balanced
	      It is the default profile. It provides balanced power saving and performance.  At the moment it enables  CPU  and  disk  plugins	of
	      tuned and it makes sure the ondemand governor is active (if supported by the current cpufreq driver). It sets the CPU energy perfor-
	      mance bias to normal. It also enables AC97 audio power saving or (it depends on your system) HDA-Intel power savings with 10 seconds
	      timeout. In case your system contains supported Radeon graphics card (with enabled KMS) it configures it to automatic power saving.

       powersave
	      Maximal  power  saving, at the moment it enables USB autosuspend (in case environment variable USB_AUTOSUSPEND is set to 1), enables
	      ALPM power saving for SATA host adapters, enables WiFi power saving, enables multi core power savings scheduler for low wakeup  sys-
	      tems and makes sure the ondemand governor is active (if supported by the current cpufreq driver). It sets the CPU energy performance
	      bias to powersave. It also enables AC97 audio power saving or (it depends on your system) HDA-Intel power savings (with  10  seconds
	      timeout).   In  case your system contains supported Radeon graphics card (with enabled KMS) it configures it to automatic power sav-
	      ing. On Asus Eee PCs dynamic Super Hybrid Engine is enabled.

       throughput-performance
	      Profile for typical throughput performance tuning. Disables power saving mechanisms and enables sysctl  settings	that  improve  the
	      throughput  performance  of  your  disk and network IO. CPU governor is set to performance and CPU energy performance bias is set to
	      performance. Disk readahead values are increased.

       latency-performance
	      Profile for low latency performance tuning. Disables power saving mechanisms.  CPU governor is set to performance andlocked  to  the
	      low C states (by PM QoS).  CPU energy performance bias to performance.

       network-throughput
	      Profile  for  throughput	network tuning. It is based on the throughput-performance profile. It additionaly increases kernel network
	      buffers.

       network-latency
	      Profile for low latency network tuning. It is  based  on	the  latency-performance  profile.  It	additionaly  disables  transparent
	      hugepages, NUMA balancing and tunes several other network related sysctl parameters.

       desktop
	      Profile  optimized for desktops based on balanced profile. It additionaly enables scheduler autogroups for better response of inter-
	      active applications.

       virtual-guest
	      Profile optimized for virtual guests based on throughput-performance profile.  It additionally decreases	virtual  memory  swapiness
	      and increases dirty_ratio settings.

       virtual-host
	      Profile  optimized  for  virtual hosts based on throughput-performance profile.  It additionally enables more aggresive writeback of
	      dirty pages.

       sap    Profile optimized for the best performance of SAP software. It is based on throughput-performance  profile.  It  additionally  tunes
	      sysctl settings regarding shared memory, semaphores and maximum number of memory map areas a process may have.

PREDEFINED COMPAT PROFILES

       We are also providing so called "compat" profiles that are here mostly for backward compatibility with tuned 1.0. They are oriented to more
       specific scenarios.

       default
	      It is the lowest of the available profiles in regard to power saving and only enables CPU and disk plugins of tuned.

       desktop-powersave
	      A power saving profile directed at desktop systems. Enables ALPM power saving for SATA host adapters as well as  the  CPU,  ethernet
	      and disk plugins of tuned.

       server-powersave
	      A  power saving profile directed at server systems. Enables ALPM power saving for SATA host adapters, and activates the CPU and disk
	      plugins of tuned.

       laptop-ac-powersave
	      Medium power saving profile directed at laptops running on AC. Enables ALPM power saving for SATA host adapters,	WiFi power  saving
	      as well as CPU, ethernet and disk plugins of tuned.

       laptop-battery-powersave
	      Strong power saving profile directed at laptops running on battery. Currently an alias to powersave profile.

       spindown-disk
	      Strong  power saving profile directed at machines with classic HDDs. It enables aggressive disk spin-down. Disk writeback values are
	      increased and disk swappiness is lowered. Log syncing is disabled. All partitions are remounted with  'noatime'  option.	All  tuned
	      plugins are disabled.

       enterprise-storage
	      Server  profile  for  high  disk	throughput  performace tuning. Disables power saving mechanisms and enables deadline IO scheduler.
	      Enables hugepages and disables disk barriers. Disk readahead values are increased. CPU governor is set to performance.

FILES

       /etc/tuned/*
       /usr/lib/tuned/*

SEE ALSO

       tuned(8) tuned-conf(5)

AUTHOR

       Jan Kalua <jkaluza@redhat.com>
       Jan Velak <jvcelak@redhat.com>
       Jaroslav karvada <jskarvad@redhat.com>
       Marcela Malaova <mmaslano@redhat.com>
       Phil Knirsch <pknirsch@redhat.com>

Fedora Power Management SIG					    28 Mar 2012 						      TUNED_ADM(8)