bionic (7) tuned-profiles.7.gz

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>