虽然我谷歌时无法找到任何有关优势的信息,但有两个缺点是显而易见的.首先,如果在安装后禁用了旧的Windows VM,它可能会破坏它们.其次,它降低了VM性能.然而,我注意到在安装Ubuntu 64bit时默认启用它.
Enable I/O APIC
Advanced Programmable Interrupt Controllers (APICs) are a newer x86 hardware feature that have replaced old-style Programmable Interrupt Controllers (PICs) in recent years. With an I/O APIC,operating systems can use more than 16 interrupt requests (IRQs) and therefore avoid IRQ sharing for improved reliability.
Note: Enabling the I/O APIC is required for 64-bit guest operating systems,especially Windows Vista; it is also required if you want to use more than one virtual cpu in a virtual machine.
However,software support for I/O APICs has been unreliable with some operating systems other than Windows. Also,the use of an I/O APIC slightly increases the overhead of virtualization and therefore slows down the guest OS a little.
Warning: All Windows operating systems starting with Windows 2000 install different kernels depending on whether an I/O APIC is available. As with ACPI,the I/O APIC therefore must not be turned off after installation of a Windows guest OS. Turning it on after installation will have no effect however.
此外,您可以关闭VirtualBox默认提供给客户机操作系统的高级配置和电源接口(ACPI). ACPI是当前的行业标准,允许操作系统识别硬件,配置主板和其他设备以及管理电源.由于所有现代PC都包含此功能,并且Windows和Linux多年来一直支持它,因此默认情况下它也在VirtualBox中启用.它可以在命令行上关闭;请参阅“VBoxManage modifyvm”一节.
