当前位置:网站首页>[QNX Hypervisor 2.2用户手册]9.1 配置变量
[QNX Hypervisor 2.2用户手册]9.1 配置变量
2022-07-24 00:49:00 【高桐@BILL】
你可以通过设置配置变量来影响qvm进程实例,Guest,CPU和虚拟设备(vdev)的行为。
配置变量通过set选项来指定,如下:
set var val
根据变量相应的设置可以应用并影响如上列出的隐式上下文。更多设置变量的语法和它们可以应用影响的隐式上下文,参考setoption 指导。这里,我们描述了各个平台支持的所有变量。
注意!
除非特别指出,每个变量可以定义在VM配置文件的任何地方。
一,常用变量
该节的变量同时支持ARM和x86平台:
1.1 exit-on-halt
- 上下文:guest-仅应用于当前于当前上下文;
- 变量类型:boolean
- 默认:on(WFI或HLT指令时Guest退出)
用于控制是否在WFI(ARM上)或HLT(x86上)指令时触发Guest退出。设置exit-on-halt为off会增加vCPU线程的CPU使用率,但是会减少中断延迟。
当Guest允许执行WFI或HLT指令,Host不能调度Guest所在的物理CPU上运行的其他任何线程执行这些指令。
1.2 fdt-dump-file
- 上下文:guest - 仅应用于当前上下文
- 变量类型:string
- 默认:
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