a question about NUMA

Let's say that I have two threads running on two different nodes. Suppose that each thread frequently call the same function foo().

Code:

---

void ThreadFunc1()
{
    //do stuff
    foo();
    //do stuff
}

void ThreadFunc2()
{
    //do other stuff
    foo();
    //do other stuff
}

void foo()
{
    //do something
}

---

Could it bring to a performance hit, since the code of foo() resides on physical memory of only one of the two nodes?

Any help is appreciated...

up...

I don't think so, unless you are changing the function (self-modifying code). The code can be cached by both CPUs. It only needs to be flushed when one copy is written to.