Processor type and features 中央处理器(CPU)类型及特性
DMA memory allocation support
支持DMA内存分配低于16MB的地址空间,如果不分配的话,这部分内存也不会被使用
[*] Enable MPS table
让多核/多CPU系统支持ACPI,可选
...............
具体选项太多,不再分析,可以参考如下引用:
Power management and ACPI options
suspend to RAM anf standby
允许系统进入睡眠状态,这种状态下主要内存是上电状态,内容得以保存,如挂起到内存;
x x [*] Hibernation (aka 'suspend to disk') x x
休眠,挂起到硬盘
x x () Default resume partition x x
默认恢复分区
x x [ ] Opportunistic sleep x x
允许系统在没有活动时进入休眠状态
x x [ ] User space wakeup sources interface x x
允许用户利用系统基础接口进行源目标的创建,激活或者遣散
x x [ ] Run-time PM core functionality x x
Enable functionality allowing I/O devices to be put into energy-saving
(low power) states at run time (or autosuspended) after a specified
period of inactivity and woken up in response to a hardware-generated
wake-up event or a driver's request.
Hardware support is generally required for this functionality to work
and the bus type drivers of the buses the devices are on are
responsible for the actual handling of the autosuspend requests and
wake-up events.
x x [ ] Power Management Debug Support x x
电源管理调试支持
x x [*] ACPI (Advanced Configuration and Power Interface) Support ---> x x
高级电源管理配置支持
x x [*] SFI (Simple Firmware Interface) Support ---> x x
简单固件接口支持
x x <M> APM (Advanced Power Management) BIOS support ---> x x
BIOS下高级电源管理支持
x x CPU Frequency scaling ---> x x
CPU频率比例
CPU Frequency scaling allows you to change the clock speed of
CPUs on the fly. This is a nice method to save power, because
the lower the CPU clock speed, the less power the CPU consumes
x x -*- CPU idle PM support x x
CPU空闲电源管理支持
x x [ ] Support multiple cpuidle drivers x x
多CPU空闲驱动支持
Allows the cpuidle framework to use different drivers for each CPU.
This is useful if you have a system with different CPU latencies and
states. If unsure say N
x x [*] Cpuidle Driver for Intel Processors
对intel处理器CPU空闲驱动支持