I think it could be VirtualBox respecting the power plans. I originally thought that this was a bug in VirtualBox, but maybe not.
Make sure that the High power plan is selected when running virtual machines VirtualBox. So it turned out to be a simple problem, partly caused by selecting the wrong power plan. Instead of working a 0.77GHz CPU really hard, Ubuntu now has access to a 3.29GHz CPU and doesn’t need to work as hard. You can actually see when I switched from the Power saver to the High performance plan in the Ubuntu System Monitor window and the CPU usage falls rapidly. This is obviously the solution to the virtual machine performance problem. Ubuntu in the virtual machine was then able to run at a normal speed and was fast and responsive. When the High performance power plan was selected in the Control Panel, the CPU ran close to its maximum speed and hovered around of 3.29GHz most of the time. Normally when extra processing power is required, the CPU speeds up, but it wasn’t doing this and rarely budged from 0.77GHz The CPU was idling at around 0.77GHz and the performance of Ubuntu reflected this.
Virtual box for windows 10 full#
In the Power saver plan I had set the mains power options all to the maximum, with the idea being that when plugged in the laptop would run at full speed, but when on batteries it would use optimal power-saving settings.ĭespite setting the battery and mains power settings correctly, or what I thought was correct, the performance of the OS in a virtual machine was still being affected. With both of these, there are separate settings for when the computer is running on battery power and when it is plugged into the mains supply. In Power Options in the Control Panel there are at least two power plans – Power saver and High performance. The host computer running VirtualBox was a laptop and the power plan was set to Power saver. When Windows Task manager was run (Ubuntu was running in a window on the Windows desktop), and the Performance tab selected, the CPU was idling.Īfter some thought and experimentation, it was discovered that the Windows power plan was having a serious effect on the performance of the OS in the virtual machine. It seemed like Ubuntu was working hard and when Ubuntu’s System Monitor was run, the CPU usage was a lot higher than it should be at around 60% when no programs were being run. Linux Mint 17 was really slow too and it seemed that it was mainly Linux that was running very slowly in a virtual machine, especially Ubuntu 15.04. That was strange because various versions of Windows running in virtual machines, were a little slow, but not that bad. It was like wading through treacle navigating menus, windows and applications. It is best if you have at least 8GB though.Ī problem arose when Ubuntu 15.04 was installed in VirtualBox and the performance was terrible. The main requirement is for lots of memory and it is a struggle with just 4GB of RAM, but it can be done.
Virtual box for windows 10 for free#
* Download and run any version of Windows for free in VirtualBoxĪ moderately powerful processor is required, but it does not need to be the top of the range.
* The one BIOS tweak you need to boost VirtualBox speed * Speed up VirtualBox enormously with this simple tweak * Top tips to speed up Windows and Linux in VirtualBox
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