1TUNED_ADM(1) General Commands Manual TUNED_ADM(1)
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6 tuned-adm - commandline tool for switching between different tuning
7 profiles
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10 tuned-adm [ help , list , active , profile <profile> , off ]
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13 This command line utility allows user to switch between user definable
14 tuning profiles. Several predefined profiles are already included for
15 some of the more common cases. Although the profiles typically refer to
16 a common use case you can of course switch to any profile on any sys‐
17 tem. So switching to the laptop-battery-powersave profile on a server
18 will activate this profile on it. This way, depending on your require‐
19 ments you can select any of the profiles that fits your needs. You can
20 even create your own profile, either based on one of the existing ones
21 by copying it or make a completely new one. The profiles are stored in
22 subdirectories below /etc/tune-profiles.
23 The power saving profiles contain settings that are typically not
25 enabled by default as they will noticeably impact the latency/perfor‐
26 mance of your system as opposed to the power saving mechanisms we have
27 enabled by default. On the other hand the performance profiles disable
28 the additional power saving mechanisms of tuned and ktune as they would
29 negatively impact the performance tuning, be it throughput or latency.
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33 help Print out the list of commands. It's also the default if you
34 start tuned-adm without any commands.
35 list List all available profiles.
38 active Show current active profile.
41 profile <profile>
44 Switches to the given profilename. If none is given or no valid
45 one is given the command gracefully exits without performing any
46 operation.
47 off Switch off all ktune and tuned settings and remove them from
50 services. The configuration file are set to previous settings.
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54 At the moment we're providing the following pre defined profiles:
55 default
58 This is the default powersaving profile. It is the lowest of the
59 available profiles in regard to powersaving and only enables CPU
60 and disk plugins of tuned.
61 desktop-powersave
64 A powersaving profile directed at desktop systems. Enables ALPM
65 powersaving for SATA host adapters as well as the CPU, ethernet
66 and disk plugins of tuned.
67 server-powersave
70 A powersaving profile directed at server systems. Enables ALPM
71 powersaving for SATA host adapters, disables CD-ROM polling via
72 hal and activates the CPU and disk plugins of tuned.
73 laptop-ac-powersave
76 Medium powersaving profile directed at laptops running on AC.
77 Enables ALPM powersaving for SATA host adapters, WiFi power
78 saving as well as CPU, ethernet and disk plugins of tuned.
79 laptop-battery-powersave
82 Strong powersaving profile directed at laptops running on bat‐
83 tery. It activates all power saving mechanisms from the previous
84 profiles plus it enables multi core power savings scheduler for
85 low wakeup systems and makes sure the ondemand governor is
86 active and the AC97 audio power saving is enabled. This profile
87 can be used for any kind of system, not only laptops on battery
88 power in order to save the maximum amount of power. The tradeoff
89 for this profile is a noticeable impact on performance, specifi‐
90 cally latency of disk and network IO.
91 throughput-performance
94 Sever profile for typical throughput performance tuning. Dis‐
95 ables tuned and ktune power saving mechanisms and enables sysctl
96 settings that improve the throughput performance of your disk
97 and network IO and switches to the deadline scheduler.
98 latency-performance
101 Sever profile for typical latency performance tuning. Disables
102 tuned and ktune power saving mechanisms and enables sysctl set‐
103 tings that improve the latency performance of your network IO.
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107 /etc/tune-profiles/*
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111 tuned(8)
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114 Marcela Mašláňová <mmaslano@redhat.com>
115 Phil Knirsch <pknirsch@redhat.com>
116Linux Programmer's Manual 9 Jul 2009 TUNED_ADM(1)