2MB call stacks? Mine are 10MB: $ ulimit -s $ 10240 I can only spawn 200 threads... | Hacker News

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rdtsc on Nov 13, 2013 | parent | context | favorite | on: The future of M:N threading

2MB call stacks?

Mine are 10MB:

    $ ulimit -s
    $ 10240

I can only spawn 200 threads in the worst case and keep them active before system starts swapping. Yes memory space is large by anytime those have to run they'd have to be brought up into the working set.

EDIT: nevermind, _wmd pointed out that stack memory is still virtual and it only be brought into the physical memory as needed.

MrBuddyCasino on Nov 13, 2013 [–]

Now I'm confused. This comment says that the stack memory is not allocated by the OS unless actually needed: https://news.ycombinator.com/item?id=6728030

Is this not true?

rdtsc on Nov 13, 2013 | [–]

That is right, the full 8MB or 10MB or whatever of max is not being paged in.

I am stupid. I'll correct the initial comment.

Thanks

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