On Mon, Nov 29, 2021 at 07:49:26PM -0500, Matthew Mondor wrote: > On Mon, 29 Nov 2021 00:05:18 +0100 > Anthony Mallet <anthony.mal...@laas.fr> wrote: > > > > Why should there be any particular minimum? It seems to me it > > > depends on what the thread is doing (though one page, whatever that > > > is on the hardware and release in question, is probably a pretty > > > hard minimum). > > > > That's why I said my question is stupid :) If the thread returns > > immediately, the minimum is 0 (or PTHREAD_STACK_MIN to account for > > libpthread). > > If I remember correctly, the stacks are large by default but only use > VM space, with pages only really allocated as usage grows. You could > try tests without altering the size and see if it still performs as > expected...
I got curious and took a look. Default pthread stack size is taken from RLIMIT_STACK, which appears to default to 4MiB on amd64 at least. -- Paul Ripke "Great minds discuss ideas, average minds discuss events, small minds discuss people." -- Disputed: Often attributed to Eleanor Roosevelt. 1948.
