PHP code example of fidry / cpu-core-counter

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

fidry / cpu-core-counter example snippets

use Fidry\CpuCoreCounter\CpuCoreCounter;
use Fidry\CpuCoreCounter\NumberOfCpuCoreNotFound;
use Fidry\CpuCoreCounter\Finder\DummyCpuCoreFinder;

$counter = new CpuCoreCounter();

// For knowing the number of cores you can use for launching parallel processes:
$counter->getAvailableForParallelisation()->availableCpus;

// Get the number of CPU cores (by default it will use the logical cores count).
// This count does not account for CPU quotas or limits, e.g. `docker run --cpus=2`
// or KUBERNETES_CPU_LIMIT. Use ::getAvailableForParallelisation() to account for them.
try {
    $counter->getCount();   // e.g. 8
} catch (NumberOfCpuCoreNotFound) {
    return 1;   // Fallback value
}

// Alternatively, to avoid having to catch the exception:

$counter = new CpuCoreCounter([
    ...CpuCoreCounter::getDefaultFinders(),
    new DummyCpuCoreFinder(1),  // Fallback value
]);

// A type-safe alternative form:
$counter->getCountWithFallback(1);

// Note that the result is memoized.
$counter->getCount();   // e.g. 8

// Remove WindowsWmicFinder 
$finders = array_filter(
    CpuCoreCounter::getDefaultFinders(),
    static fn (CpuCoreFinder $finder) => !($finder instanceof WindowsWmicFinder)
);

$cores = (new CpuCoreCounter($finders))->getCount();

// Use CPUInfo first & don't use Nproc
$finders = [
    new CpuInfoFinder(),
    new WindowsWmicFinder(),
    new HwLogicalFinder(),
];

$cores = (new CpuCoreCounter($finders))->getCount();

$result = $counter->getAvailableForParallelisation();

$result->totalCoresCount;       // e.g. 8
$result->correctedCountLimit;   // e.g. 2, or null if there is no limit
$result->availableCpus;         // e.g. 2