3 ms·

That's true, but the majority of those 64-bit servers only have a 48-bit address space to millions of gigabyte-sized stacks would still be a tight fit.

• alexlarsson 13y ago
  Obviously it would be a "virtual" gigabyte-size stack. I.e. it would be mmapped, but all the threads would not actually be using all their stack. Physical memory is not allocated, but virtual addresses are.
  • dbaupp 13y ago
    One can only fit 2^18 == 262144 stacks with size 1GiB into the 48-bit x86-64 address space (i.e. 48 bits is the total virtual address size).
    • zokier 13y ago
      Isn't 1GiB stack quite huge? I would have excepted them to be like order of magnitude smaller.
      • noselasd 13y ago
        Yes, it's huge. C programs on linux normally defaults to a 8 or 10 MB stack per thread, and that is considered huge by many.