From 2d57d6d7e0dd7c18e03a3074a193243cbf51bea3 Mon Sep 17 00:00:00 2001 From: f4exb Date: Wed, 9 May 2018 17:05:17 +0200 Subject: [PATCH] Added mention of Ubuntu 18.04 powersave CPU governor being now the default --- Readme.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Readme.md b/Readme.md index f3a7cacb2..0bdfb47d0 100644 --- a/Readme.md +++ b/Readme.md @@ -295,6 +295,10 @@ The software is installed in `/opt/sdrangel` you can start it from the command l - `/opt/sdrangel/bin/sdrangel` **⚠** The udev rules are not set by the package installation so you will have to set it manually in order to be able to access the various SDR hardware. The `udev-rules` folder contains the rules file and the `install.sh` script that you can run as sudo to install all rules files. You may also adapt the script to copy only the required files. + +

Ubuntu 18.04

+ +The default CPU governor is now `powersave` which exhibits excessive CPU usage when running SDRangel. In the case of benchmarking and maybe high throughput usage it is recommended to switch to `performance` before running SDRangel by running the command: `sudo cpupower frequency-set --governor performance`. You can turn it back to `powersave` any time by running: `sudo cpupower frequency-set --governor powersave`. It is normal that with a lower CPU frequency the relative CPU usage rises for the same actual load. If not impairing operation this is normal and overall beneficial for heat and power consumption.

Windows distribution