TUNED_PROFILES(7) tuned TUNED_PROFILES(7)
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 con‐
sumption, low latency and others. You can mostly deduce the purpose of the profile by its name or you can see
full description bellow.
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 ondemand 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_AUTO‐
SUSPEND is set to 1), enables ALPM power saving for SATA host adapters and sets the link power manam‐
gent policy to min_power. It also enables WiFi power saving, enables multi core power savings sched‐
uler for low wakeup systems 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 andlocked to the low C states (by PM QoS). CPU energy performance bias to performance.
Profile optimized for desktops based on balanced profile. It additionaly 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 aggresive 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-pro‐
files-oracle(7) tuned-profiles-realtime(7) tuned-profiles-nfv(7) tuned-profiles-compat(7)
AUTHOR
Jaroslav Škarvada <[email protected]> Jan Kaluža <[email protected]> Jan Včelák <[email protected]>
Marcela Mašláňová <[email protected]> Phil Knirsch <[email protected]>
Fedora Power Management SIG 23 Sep 2014 TUNED_PROFILES(7)
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