Opened 6 years ago
#17909 new defect
weird time adjustment
| Reported by: | daybit | Owned by: | |
|---|---|---|---|
| Component: | VM control | Version: | VirtualBox 5.1.38 |
| Keywords: | time adjustment | Cc: | |
| Guest type: | Windows | Host type: | Linux |
Description
Hello. I use "VirtualBox Graphical User Interface Version 5.1.38_Ubuntu r122592 © 2004-2018 Oracle Corporation (Qt5.5.1)". And using Windows XP on it. I use my own program to track the accuracy of the time, and sometimes I notice that Windows is weirdly tuning the time. For example I attach today's graph of adjustment.
It can be seen that the detuning runs on some kind of sinusoid, and then at some point it goes out on a flat line. Then, when the detuning builds up, it for some reason again goes to the sinusoid of an unacceptably large amplitude, and then again sets the normal time. On the vertical axis - milliseconds. That is, during these sinusoid detuning reaches 15 seconds - it's terrible, I think.
I tried to disable the vm module on WindowsXP, and the tuning is disabled, but the clipboard between vm and my machine stops working as well - thats not good.
So, I have a couple of questions:
1) Why is there such a strange sinusoid used in the time adjustment (which uses the SetSystemTimeAdjustment) instead of a rapidly decaying exponent?
2) can I disable this strange time adjustment without disabling the clipboard?
screenshot