/usr/share/phoronix-test-suite/pts-core/objects/phodevi/sensors/gpu_usage.php is in phoronix-test-suite 4.8.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
Phoronix Test Suite
URLs: http://www.phoronix.com, http://www.phoronix-test-suite.com/
Copyright (C) 2009 - 2011, Phoronix Media
Copyright (C) 2009 - 2011, Michael Larabel
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class gpu_usage implements phodevi_sensor
{
static $probe_ati_overdrive = false;
static $probe_radeon_fences = false;
static $probe_intel_commands = false;
static $probe_nvidia_smi = false;
public static function get_type()
{
return 'gpu';
}
public static function get_sensor()
{
return 'usage';
}
public static function get_unit()
{
if(self::$probe_ati_overdrive || self::$probe_nvidia_smi)
{
$unit = 'Percent';
}
else if(self::$probe_radeon_fences)
{
$unit = 'Fences/s';
}
else if(self::$probe_intel_commands)
{
$unit = 'Commands/s';
}
return $unit;
}
public static function support_check()
{
if(phodevi::is_ati_graphics() && phodevi::is_linux())
{
$gpu_usage = self::ati_overdrive_core_usage();
if(is_numeric($gpu_usage))
{
self::$probe_ati_overdrive = true;
return true;
}
}
else if(phodevi::is_mesa_graphics())
{
if(is_readable('/sys/kernel/debug/dri/0/radeon_fence_info'))
{
$fence_speed = self::radeon_fence_speed();
if(is_numeric($fence_speed) && $fence_speed >= 0)
{
self::$probe_radeon_fences = true;
return true;
}
}
else if(is_readable('/sys/kernel/debug/dri/0/i915_gem_seqno'))
{
$commands = self::intel_command_speed();
if(is_numeric($commands) && $commands > 0)
{
self::$probe_intel_commands = true;
return true;
}
}
}
else if(phodevi::is_nvidia_graphics())
{
if(pts_client::executable_in_path('nvidia-smi'))
{
$usage = self::nvidia_core_usage();
if(is_numeric($usage) && $usage >= 0 && $usage <= 100)
{
self::$probe_nvidia_smi = true;
return true;
}
}
}
return false;
}
public static function read_sensor()
{
if(self::$probe_ati_overdrive)
{
return self::ati_overdrive_core_usage();
}
else if(self::$probe_nvidia_smi)
{
return self::nvidia_core_usage();
}
else if(self::$probe_radeon_fences)
{
return self::radeon_fence_speed();
}
else if(self::$probe_intel_commands)
{
return self::intel_command_speed();
}
}
public static function ati_overdrive_core_usage()
{
return phodevi_linux_parser::read_ati_overdrive('GPUload');
}
public static function nvidia_core_usage()
{
$nvidia_smi = shell_exec('nvidia-smi -a');
$util = substr($nvidia_smi, strpos($nvidia_smi, 'Utilization'));
$util = substr($util, strpos($util, 'GPU'));
$util = substr($util, strpos($util, ':') + 1);
$util = trim(substr($util, 0, strpos($util, '%')));
return $util;
}
public static function radeon_fence_speed()
{
// Determine GPU usage
$fence_speed = -1;
/*
Last signaled fence 0x00AF9AF1
Last emited fence ffff8800ac0e2080 with 0x00AF9AF1
*/
$fence_info = file_get_contents('/sys/kernel/debug/dri/0/radeon_fence_info');
$start_signaled_fence = substr($fence_info, strpos('Last signaled fence', $fence_info));
$start_signaled_fence = substr($start_signaled_fence, 0, strpos($start_signaled_fence, "\n"));
$start_signaled_fence = substr($start_signaled_fence, strrpos($start_signaled_fence, ' '));
sleep(1);
$fence_info = file_get_contents('/sys/kernel/debug/dri/0/radeon_fence_info');
$end_signaled_fence = substr($fence_info, strpos('Last signaled fence', $fence_info));
$end_signaled_fence = substr($end_signaled_fence, 0, strpos($end_signaled_fence, "\n"));
$end_signaled_fence = substr($end_signaled_fence, strrpos($end_signaled_fence, ' '));
$fence_speed = hexdec($end_signaled_fence) - hexdec($start_signaled_fence);
return $fence_speed;
}
protected static function intel_current_sequence_count()
{
$count = 0;
$i915_gem_seqno = file_get_contents('/sys/kernel/debug/dri/0/i915_gem_seqno');
$current_sequence = strpos($i915_gem_seqno, 'Current sequence (render ring): ');
if($current_sequence !== false)
{
$current_sequence = substr($i915_gem_seqno, $current_sequence + 32);
$current_sequence = substr($current_sequence, 0, strpos($current_sequence, PHP_EOL));
if(is_numeric($current_sequence))
{
$count = $current_sequence;
}
}
return $count;
}
public static function intel_command_speed()
{
// Determine GPU usage
$first_read = self::intel_current_sequence_count();
sleep(1);
$second_read = self::intel_current_sequence_count();
return $second_read - $first_read;
}
}
?>
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