隔离CPU核心（物理或逻辑？）

Question

我是否正确地认为内核参数＆＃39; isolcpus＆＃39;接受物理核心ID？因此，如果我有4个物理内核，并且启用了超线程，这使我总共有8个内核，那么我只允许在isolcpus参数中指定cpu内核1..3（core0适用于OS）？

感谢。

Answer 1

是开源的。

Documentation/kernel-parameters.txt

isolcpus=   [KNL,SMP] Isolate CPUs from the general scheduler.
        Format:
        <cpu number>,...,<cpu number>
        or
        <cpu number>-<cpu number>
        (must be a positive range in ascending order)
        or a mixture
        <cpu number>,...,<cpu number>-<cpu number>

        This option can be used to specify one or more CPUs
        to isolate from the general SMP balancing and scheduling
        algorithms. You can move a process onto or off an
        "isolated" CPU via the CPU affinity syscalls or cpuset.
        <cpu number> begins at 0 and the maximum value is
        "number of CPUs in system - 1".

        This option is the preferred way to isolate CPUs. The
        alternative -- manually setting the CPU mask of all
        tasks in the system -- can cause problems and
        suboptimal load balancer performance.

如果这还不够，只需搜索isolcplus的来源，然后查看如何使用。