assertTrue(later.compareTo(initial) > 0, "Elapsed time should increase");
        assertTrue(
                later.minus(initial).toMillis() >= 45,
                "Elapsed time difference should be at least 45ms (accounting for some timing variance)");
    }

    @Test
    @DisplayName("MonotonicClock start time should remain constant")
    void testStartTime() throws InterruptedException {

# Start writeback at 3% memory
vm.dirty_background_ratio=3
# Force writeback at 10% memory
vm.dirty_ratio=10

# Quite a few memory map
# areas may be consumed
vm.max_map_count=524288

# Default is 500000 = 0.5ms
kernel.sched_migration_cost_ns=5000000

# stalled hdd io threads
kernel.hung_task_timeout_secs=85

# network tuning for bigger throughput
net.core.netdev_max_backlog=250000
net.core.somaxconn=16384