红帽全球峰会3.2. EFI 固件中的 C-state 设置
在大多数带有 EFI 固件的系统中，您可以启用和禁用单个消耗状态(C-states)。但是，在 RHEL 中，空闲驱动程序决定内核是否使用固件中的设置。
这些驱动程序可用：
-
intel_idle：这是具有 Intel CPU 的主机上的默认驱动程序，并忽略 EFI 固件中的 C-state 设置。 -
acpi_idle：如果intel_idle被禁用了，RHEL 在具有来自 Intel 以外的厂商的 CPU 的主机上使用此驱动程序。默认情况下，acpi_idle驱动程序使用 EFI 固件中的 C-state 设置。
详情请查看 kernel-doc 软件包提供的 /usr/share/doc/kernel-doc-<version>/Documentation/admin-guide/pm/cpuidle.rst 文件。
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