t.Errorf("Failure to decrease timeout appropriately")
	}
}

func TestDynamicTimeoutConcurrent(t *testing.T) {
	// Race test.
	timeout := newDynamicTimeout(time.Second, time.Millisecond)
	var wg sync.WaitGroup
	for i := 0; i < runtime.GOMAXPROCS(0); i++ {
		wg.Add(1)
		rng := rand.New(rand.NewSource(int64(i)))
		go func() {
			defer wg.Done()
			for range 100 {
				for range 100 {

			t.Fatal("failed to acquire lock")
		}

		// lk2
		lk2ch := make(chan struct{})
		go func() {
			defer close(lk2ch)
			nsLk.lock(ctx, "volume", "path", "source", "opsID", false, 1*time.Millisecond)
		}()
		time.Sleep(1 * time.Millisecond) // wait for goroutine to advance; ref=2

		// Unlock the 1st lock; ref=1 after this line
		nsLk.unlock("volume", "path", false)

package cmd

import (
	"testing"
	"time"
)

func TestTierMetrics(t *testing.T) {
	tier := "WARM-1"
	globalTierMetrics.Observe(tier, 200*time.Millisecond)
	expSuccess := 10
	expFailure := 5
	for range expSuccess {
		globalTierMetrics.logSuccess(tier)
	}
	for range expFailure {
		globalTierMetrics.logFailure(tier)
	}
	metrics := globalTierMetrics.Report()

		},
		{
			val:   0.31,
			label: labels[1],
		},
		{
			val:   0.61,
			label: labels[3],
		},
		{
			val:   0.79,
			label: labels[2],
		},
	}
	ticker := time.NewTicker(1 * time.Millisecond)
	defer ticker.Stop()
	for _, obs := range observations {
		// Send observations once every 1ms, to simulate delay between
		// observations. This is to test the channel based
		// synchronization used internally.

	peerRESTListenBucket = "bucket"
	peerRESTListenPrefix = "prefix"
	peerRESTListenSuffix = "suffix"
	peerRESTListenEvents = "events"
	peerRESTLogMask      = "log-mask"
)

	lastSyncTime := atomic.LoadUint64(&globalIAMSys.LastRefreshTimeUnixNano)
	if lastSyncTime != 0 {
		m.Set(sinceLastSyncMillis, float64((uint64(time.Now().UnixNano())-lastSyncTime)/uint64(time.Millisecond)))
	}
	m.Set(syncFailures, float64(atomic.LoadUint64(&globalIAMSys.TotalRefreshFailures)))
	m.Set(syncSuccesses, float64(atomic.LoadUint64(&globalIAMSys.TotalRefreshSuccesses)))
	return nil

		select {
		case <-ctx.Done():
			return ctx.Err()
		default:
			// Sleep and stagger to avoid blocked CPU and thundering
			// herd upon start up sequence.
			time.Sleep(25*time.Millisecond + time.Duration(rand.Int63n(int64(100*time.Millisecond))))
			retries++
			// after 20 retries start logging that servers are not reachable yet
			if retries >= 20 {

}

func waitForLowIO(maxIO int, maxWait time.Duration, currentIO func() int) {
	// No need to wait run at full speed.
	if maxIO <= 0 {
		return
	}

	const waitTick = 100 * time.Millisecond

	tmpMaxWait := maxWait

	for currentIO() >= maxIO {
		if tmpMaxWait > 0 {
			if tmpMaxWait < waitTick {
				time.Sleep(tmpMaxWait)
				return
			}
			time.Sleep(waitTick)
			tmpMaxWait -= waitTick

            Calendar cal = Calendar.getInstance();

            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);

            if (cal.getTime().after(lastModified)) {
                checkForUpdates = true;
            }
        } else if (updatePolicy.startsWith(UPDATE_POLICY_INTERVAL)) {

		if len(leaked) == 0 {
			return
		}
		// wait a test again will deadline.
		if UTCNow().Before(deadline) {
			time.Sleep(leakDetectPauseTimeMs * time.Millisecond)
			continue
		}
		// after the deadline time report all the difference in the latest snapshot compared with the initial one.
		for _, g := range leaked {
			t.Errorf("Leaked goroutine: %v", g)
		}
		return
	}