Manual Pages for Linux CentOS command on man tuned-profiles
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Manual Pages for Linux CentOS command on man tuned-profiles

TUNEDPROFILES(7) tuned TUNEDPROFILES(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 per‐ formance 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 cus‐ tomized profiles between tuned updates. The power saving profiles contain settings that are typically not enabled by default as they will noticeably impact the latency/perfor‐ mance 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 nega‐ tively 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 mediumpower. 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 sav‐ ing. powersave Maximal power saving, at the moment it enables USB autosuspend (in case environment variable USBAUTOSUSPEND is set to 1), enables ALPM power saving for SATA host adapters and sets the link power management policy to minpower. 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 sup‐ ported 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 gov‐ ernor 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 sav‐ ing 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 transpar‐ ent 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-perfor‐ mance profile. It additionally decreases virtual memory swappi‐ ness and increases dirtyratio settings.

virtual-host

Profile optimized for virtual hosts based on throughput-perfor‐ mance profile. It additionally enables more aggressive write‐ back 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-pro‐

files-realtime(7) tuned-profiles-nfv-host(7) tuned-pro‐

files-nfv-guest(7) tuned-profiles-cpu-partitioning(7) tuned-pro‐

files-compat(7) AUTHOR Jaroslav Škarvada Jan Kaluža Jan Včelák Marcela Mašláňová Phil Knirsch Fedora Power Management SIG 30 Mar 2017 TUNEDPROFILES(7)




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