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by alexlarsson 4601 days 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.
1 comments
dbaupp 4601 days 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).
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zokier 4601 days ago
Isn't 1GiB stack quite huge? I would have excepted them to be like order of magnitude smaller.
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noselasd 4601 days 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.
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