if err != nil {
		metricsLogIf(ctx, err)
	} else if openFDs > 0 {
		m.Set(processFileDescriptorOpenTotal, float64(openFDs))
	}
}

// loadProcessMetrics - `MetricsLoaderFn` for process metrics
func loadProcessMetrics(ctx context.Context, m MetricValues, c *metricsCache) error {
	m.Set(processGoRoutineTotal, float64(runtime.NumGoroutine()))

	if !globalBootTime.IsZero() {

			processFileDescriptorOpenTotalMD,
			processSyscallReadTotalMD,
			processSyscallWriteTotalMD,
			processResidentMemoryBytesMD,
			processVirtualMemoryBytesMD,
			processVirtualMemoryMaxBytesMD,
		},
		loadProcessMetrics,
	)

	systemDriveMG := NewMetricsGroup(systemDriveCollectorPath,
		[]MetricDescriptor{
			driveUsedBytesMD,
			driveFreeBytesMD,
			driveTotalBytesMD,
			driveUsedInodesMD,
			driveFreeInodesMD,