Average Load (1m, 5m, 15m) Display for Windows

avgload.ps1

# https://github.com/giampaolo/psutil/blob/master/psutil/arch/windows/wmi.c

$LOADAVG_FACTOR_1F = 0.9200444146293232478931553241
$LOADAVG_FACTOR_5F = 0.9834714538216174894737477501
$LOADAVG_FACTOR_15F = 0.9944598480048967508795473394

$SAMPLING_INTERVAL = 5

$load_avg_1m = 0.0;
$load_avg_5m = 0.0;
$load_avg_15m = 0.0;

$myCounter = New-Object -TypeName 'System.Diagnostics.PerformanceCounter' -ArgumentList ('System', 'Processor Queue Length', $null, '.')

try {
    while ($true) {
        $currentLoad = $myCounter.NextValue()
        $load_avg_1m = $load_avg_1m * $LOADAVG_FACTOR_1F + $currentLoad * (1.0 - $LOADAVG_FACTOR_1F);
        $load_avg_5m = $load_avg_5m * $LOADAVG_FACTOR_5F + $currentLoad * (1.0 - $LOADAVG_FACTOR_5F);
        $load_avg_15m = $load_avg_15m * $LOADAVG_FACTOR_15F + $currentLoad * (1.0 - $LOADAVG_FACTOR_15F);

        ([Math]::Round($load_avg_1m, 2), [Math]::Round($load_avg_5m, 2), [Math]::Round($load_avg_15m, 2)) | ConvertTo-Json -Compress | Write-Output
        Sleep -Seconds $SAMPLING_INTERVAL
    }
} finally {
    $myCounter.Dispose()
}