如何使用CPUID作为序列化指令? [英] How to use CPUID as a serializing instruction?

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CPUID可以用作序列化指令，如此处和

CPUID can be used as a serializing instruction as described here and here. What is the minimal/simplest asm syntax to use it in that way in C++?

// Is that enough?
// What to do with registers and memory?
// Is volatile necessary?
asm volatile("CPUID":::);

您是否没有使用篱笆操作是有原因的吗?如果目标是序列化一段代码，则可以执行类似的操作

Is there a reason you're not using the fence operations? If the goal is to serialize a section of code you can do something like

    asm __volatile__ (
" mfence \n"
" lfence \n"
);
Your code
asm __volatile__ (
" mfence \n"
" lfence \n"
);

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