NAME

       tuned-profiles - description of basic tuned profiles

DESCRIPTION

       These  are  the base profiles which are mostly shipped in the base tuned package. They are
       targeted to various goals. Mostly they provide performance  optimizations  but  there  are
       also  profiles  targeted  to low power consumption, low latency and others. You can mostly
       deduce the purpose of the profile by its name or you can see full description below.

       The profiles are stored in subdirectories below /usr/lib/tuned. If you need  to  customize
       the  profiles,  you  can copy them to /etc/tuned and modify them as you need. When loading
       profiles with the same name, the /etc/tuned takes precedence. In such case  you  will  not
       lose your customized profiles  between tuned updates.

       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.

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
              conservative  governor  is active (if supported by the current cpufreq driver).  It
              enables ALPM power saving for SATA host adapters and sets the link power management
              policy  to medium_power. It also sets the CPU energy performance 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 and sets the link power management policy to min_power.  It  also  enables
              WiFi  power  saving 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 saving.
              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 and locked 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 additionally increases kernel network buffers.

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

       desktop
              Profile optimized for desktops based on balanced profile. It  additionally  enables
              scheduler autogroups for better response of interactive applications.

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

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

FILES

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

SEE ALSO

       tuned(8) tuned-adm(8) tuned-profiles-atomic(7)  tuned-profiles-sap(7)  tuned-profiles-sap-
       hana(7)   tuned-profiles-oracle(7)  tuned-profiles-realtime(7)  tuned-profiles-nfv-host(7)
       tuned-profiles-nfv-guest(7) tuned-profiles-cpu-partitioning(7) tuned-profiles-compat(7)

AUTHOR

       Jaroslav Škarvada <jskarvad@redhat.com>
       Jan Kaluža <jkaluza@redhat.com>
       Jan Včelák <jvcelak@redhat.com>
       Marcela Mašláňová <mmaslano@redhat.com>
       Phil Knirsch <pknirsch@redhat.com>