tuned-main.conf(5) tuned-main.conf file format description tuned-main.conf(5)NAME
tuned-main.conf - Tuned global configuration file
SYNOPSIS
/etc/tuned/tuned-main.conf
DESCRIPTION
This man page documents format of the Tuned global configuration file. The tuned-main.conf file uses the ini-file format.
dynamic_tuning=BOOL
This defines whether the dynamic tuning is enabled. It is boolean value. It can be True or 1 if the dynamic tuning is enabled and
False or 0 if disabled. In such case only the static tuning will be used. Please note if it is enabled here, it is still possible to
individually disable it in plugins.
sleep_interval=INT
Tuned daemon is periodically waken after INT seconds and checks for events. By default this is set to 1 second. If you have Python 2
interpreter with applied patch from Red Hat Bugzilla #917709 this controls responsiveness time of Tuned to commands (i.e. if you
request profile switch, it may take up to 1 second until Tuned reacts). Increase this number for higher responsiveness times and
more power savings (due to lower number of wakeups). In case you have unpatched Python 2 interpreter, this settings will have no
visible effect, because the intepreter will poll 20 times per second.
update_interval=INT
Update interval for dynamic tuning (in seconds). Tuned daemon is periodically waken after INT seconds, updates its monitors, calcu-
lates new tuning parameters for enabled plugins and applies the changes. Plugins that have disabled dynamic tuning are not pro-
cessed. By default the INT is set to 10 seconds. Tuned daemon doesn't periodically wake if dynamic tuning is globally disabled (see
dynamic_tuning) or this setting set to 0. This must be multiple of sleep_interval.
EXAMPLE
dynamic_tuning = 1
sleep_interval = 1
update_interval = 10
FILES
/etc/tuned/tuned-main.conf
SEE ALSO tuned(8)AUTHOR
Written by Jaroslav karvada <jskarvad@redhat.com>.
REPORTING BUGS
Report bugs to <power-management@lists.fedoraproject.org>.
Jaroslav karvada 15 Oct 2013 tuned-main.conf(5)
Check Out this Related Man Page
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)