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<?php
namespace gipfl\LinuxHealth;
class Cpu
{
public static function getCounters($procFile = '/proc/stat')
{
$info = [];
$cpus = [];
$cpuKeys = [ // From 'man proc':
'user', // Time spent in user mode.
'nice', // Time spent in user mode with low priority (nice).
'system', // Time spent in system mode.
'idle', // Time spent in the idle task.
// This value should be USER_HZ times the second entry in the
// /proc/uptime pseudo-file.
'iowait', // Time waiting for I/O to complete. (Linux >= 2.5.41)
'irq', // Time servicing interrupts. (Linux >= 2.6.0-test4)
'softirq', // Time servicing softirqs. (Linux >= 2.6.0-test4)
'steal', // Stolen time, which is the time spent in other operating
// systems when running in a virtualized environment
// (Linux >= 2.6.11)
'guest', // Time spent running a virtual CPU for guest operating systems
// under the control of the Linux kernel. (Linux >= 2.6.24)
'guest_nice' // Time spent running a niced guest (virtual CPU for guest
// operating systems under the control of the Linux kernel).
// (Linux >= 2.6.33)
];
// TODO:
// ctxt 891299797 -> The number of context switches that the system underwent
// btime 1540828526 -> boot time, in seconds since the Epoch
// processes 2079015 -> Number of forks since boot
// procs_running 6 -> Number of processes in runnable state
// procs_blocked 0 -> Number of processes blocked waiting for I/O to complete
foreach (file($procFile, FILE_IGNORE_NEW_LINES) as $line) {
$parts = preg_split('/\s+/', $line);
$key = array_shift($parts);
if (substr($key, 0, 3) === 'cpu') {
// TODO: handle count mismatch
$cpus[$key] = array_combine(
array_slice($cpuKeys, 0, count($parts), true),
$parts
);
for ($i = count($cpus[$key]) - 1; $i < count($cpuKeys); $i++) {
$cpus[$key][$cpuKeys[$i]] = 0;
}
} else {
$info[$key] = $parts;
}
}
return $cpus;
}
}
|
