id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
10691	Enabling ACPI drastically cuts VM performance	mTi3Ad9vN		"I am running compute-intensive tasks on Virtualbox VMs. I find that VMs with ACPI enabled (.vbox file contains <BIOS><ACPI enabled=""true""/>...</BIOS>) take approximately 4 times as long to perform a given task as VMs with ACPI disabled.

Disabling ACPI (by stopping the affected VM, exiting the VirtualBox GUI, killing VBoxSVC, editing the VM's .vbox file, and restarting the VM) fixes the problem immediately.

Virtualbox is v.4.1.16.

Host OS is Win 7 Ultimate SP1.

Guest OS is Ubuntu 10.04 LTS."	defect	closed	VMM	VirtualBox 4.1.16	obsolete			other	other