sets "compute mode" on AMD GPU's in linux

ubu_1804_amdgpu_compute_mode_linux.php

#!/usr/bin/env php
<?php
declare(strict_types = 1);
// this does NOT work on my ubuntu 20.04, look at the other files for a 20.04 version
if (posix_geteuid () !== 0) {
	die ( "error: this script requires root privileges, re-run it as root." );
}
$amdgpu_dir = '/sys/bus/pci/drivers/amdgpu';
$dirs = array_filter ( array_map ( 'trim', glob ( $amdgpu_dir.DIRECTORY_SEPARATOR.'*', GLOB_NOSORT | GLOB_ONLYDIR | GLOB_MARK  ) ), function (string $str) {
	return (is_writable ( $str."power_dpm_force_performance_level" ) && is_writable ( $str.'pp_compute_power_profile' ));
} );
$max = count ( $dirs );
if ($max === 0) {
	die ( "error: found 0 applicable devices in $amdgpu_dir\n" );
}
echo "found $max applicable amdgpu devices\n";
$i = 0;
foreach ( $dirs as $gpu ) {
	++ $i;
	echo "setting card {$i}/{$max}: {$gpu}		..";
	my_write ( $gpu."power_dpm_force_performance_level", "auto" );
	my_write ( $gpu."pp_compute_power_profile", "set" );
	echo ". done\n";
}
die ( "finished!\n" );
function my_write(string $file, string $data, bool $append = false) {
	if (! is_writable ( $file )) {
		throw new \RuntimeException ( "$file is not writable!" );
	}
	$len = strlen ( $data );
	$written = file_put_contents ( $file, $data, $append ? FILE_APPEND : 0 );
	if ($written !== $len) {
		throw new \RuntimeException ( "tried to write $len bytes, but could only write $written bytes, file: $file" );
	}
	return $written;
}

ubu_2004_amdgpu_compute_mode_linux.php

#!/usr/bin/env php
<?php
declare(strict_types = 1);
// this does NOT work on ubuntu18.04, look at other files for an 18.04 version
if (posix_geteuid () !== 0) {
	die ( "error: this script requires root privileges, re-run it as root." );
}
$amdgpu_dir = '/sys/bus/pci/drivers/amdgpu';
$dirs = array_filter ( array_map ( 'trim', glob ( $amdgpu_dir.DIRECTORY_SEPARATOR.'*', GLOB_NOSORT | GLOB_ONLYDIR | GLOB_MARK  ) ), function (string $str) {
	return (is_writable ( $str."power_dpm_force_performance_level" ) && is_writable ( $str.'pp_power_profile_mode' ));
} );
$max = count ( $dirs );
if ($max === 0) {
	die ( "error: found 0 applicable devices in $amdgpu_dir\n" );
}
echo "found $max applicable amdgpu devices\n";
$i = 0;
foreach ( $dirs as $gpu ) {
	++ $i;
	echo "setting card {$i}/{$max}: {$gpu}		..";
	my_write ( $gpu."power_dpm_force_performance_level", "manual" );
	my_write ( $gpu."pp_power_profile_mode", "5" );
	echo ". done\n";
}
die ( "finished!\n" );
function my_write(string $file, string $data, bool $append = false) {
	if (! is_writable ( $file )) {
		throw new \RuntimeException ( "$file is not writable!" );
	}
	$len = strlen ( $data );
	$written = file_put_contents ( $file, $data, $append ? FILE_APPEND : 0 );
	if ($written !== $len) {
		throw new \RuntimeException ( "tried to write $len bytes, but could only write $written bytes, file: $file" );
	}
	return $written;
}

Thanks for this, much appreciated!

Will it work on today latest drivers

Will it work on today latest drivers

kinda doubt it, on Ubuntu 16.04, the interface for activating "compute mode" was something like

set pp_power_profile_mode to the magic number 4

and around Ubuntu 18.04 the interface changed to like

activate pp_compute_power_profile

so it wouldn't surprise me if the correct way to set compute-mode has changed yet again by ubuntu 20.04...

in any case, i don't have any system to test on, so i don't know.

https://wiki.archlinux.org/index.php/AMDGPU#Power_profiles

Will it work on today latest drivers

made a new ubuntu 20.04 version based on the link provided by liolok ^^ this version doesn't seem to work on 18.04 though.