CLOCK_REALTIME reports the actual wall clock time. CLOCK_MONOTONIC is for measuring relative real time. It advances at the same rate as the actual flow of time but it’s not subject to discontinuities from manual or automatic (NTP) adjustments to the system clock. CLOCK_PROCESS_CPUTIME_ID is for measuring the amount of CPU time consumed by the process. … Read more
You may use .slice to extract a portion of a string. Pass a negative number to it, in order to slice from the end of the string. Therefore, the following is possible, and quite simple: (‘0’+currentMinutes).slice(-2) Concatenating with ‘0’ makes sure that the target of the operation will always be a string. (‘0’+currentMinutes) will yield … Read more
My favoured technique: signal clk : std_logic := ‘0’; — make sure you initialise! … clk <= not clk after half_period; I usually extend this with a finished signal to allow me to stop the clock: clk <= not clk after half_period when finished /= ‘1’ else ‘0’; If you use a std_logic item for … Read more
Try sudo chronyc -a makestep This will update your system clock quickly (might break some running applications), using the time sources defined in /etc/chronyd.conf. -a is needed to avoid 501 Not authorised error
I think I worked it out. time() carries on incrementing while the device is asleep, but of course can be manipulated by the operating system or user. However, the Kernel boottime (a timestamp of when the system last booted) also changes when the system clock is changed, therefore even though both these values are not … Read more
Add following code in your onCreate() method: Thread thread = new Thread() { @Override public void run() { try { while (!thread.isInterrupted()) { Thread.sleep(1000); runOnUiThread(new Runnable() { @Override public void run() { // update TextView here! } }); } } catch (InterruptedException e) { } } }; thread.start(); This code starts an thread which sleeps … Read more
The speed of a computer processor, or CPU, is determined by the Clock Cycle, which is the amount of time between two pulses of an oscillator. Generally speaking, the higher number of pulses per second, the faster the computer processor will be able to process information. The clock speed is measured in Hz, typically either … Read more
The documentation lacks some details here. What VirtualBox does every 10 seconds is just slight adjustement (something like 0.005 seconds). Only when the time difference reaches a threshold (20 minutes by default) a “real” resync is done. You can reduce the thresold (i.e. to 10 seconds) with the following command: VBoxManage guestproperty set <vm-name> “/VirtualBox/GuestAdd/VBoxService/–timesync-set-threshold” … Read more
I would avoid using System.currentTimeMillis() for measuring elapsed time. currentTimeMillis() returns the ‘wall-clock’ time, which may change (eg: daylight savings, admin user changing the clock) and skew your interval measurements. System.nanoTime(), on the other hand, returns the number of nanoseconds since ‘some reference point’ (eg, JVM start up), and would therefore not be susceptible to … Read more