![]() Search for Clock and click the top result to open the app. Do NOTsend me Personal Messages (PMs) for troubleshooting, they are simply deleted. To create and use timers on Windows 11 with the Clock app, use these steps: Open Start. See the 'Upload attachment' tab below the reply form. Save only the first'VBox.log', ZIP itand attach it to your response. To verify the host-guest time synchronization has been configured correctly, use the chronyc sources command on a guest. There are known issues with time skew/drift/jumping in KVM guests. With the VM completely shut down (not paused or saved), right-click on the VM in the VirtualBox Manager and select 'Show Log'. This is the battery-backed clock that keeps time even when the. The questions to ask are: Is the system time shown by your VM host accurate (i.e. Two clocks are important in Linux: a hardware clock, also known as RTC, CMOS or BIOS clock. The maximum frequency you can achieve is clock / 4, by setting the prescaler to 1. The kernel will sync the hardware clock to the system time automatically every 11 minutes anyway, but that's just to deal with the possibility of a clean shutdown not happening. ![]() Restart the chrony daemon: # systemctl restart chronyd The system clock maintained by the kernel is the only one which matters. # echo ptp_kvm > /etc/modules-load.d/ptp_kvm.confĪdd the /dev/ptp0 clock as a reference to the chrony configuration: # echo "refclock PHC /dev/ptp0 poll 2" > /etc/nf Set the ptp_kvm module to load after reboot. From patchwork Tue Dec 28 15:18:57 2021 Content-Type: text/plain charset'utf-8' MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: utf-8b. To enable the PHC device, do the following inside a virtual machine: ![]() Red Hat Enterprise Linux 7.5 and later provide a virtual PTP hardware clock (PHC), which enables the guests to synchronize to the host with a sub-microsecond accuracy. ![]()
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