On Wed, Jun 22, 2016 at 09:56:06PM +0100, Peter Maydell wrote: > On 22 June 2016 at 20:55, Peter Lieven <p...@kamp.de> wrote: > > What makes the coroutine pool memory intensive is the stack size of 1MB per > > coroutine. Is it really necessary to have such a big stack? > > That reminds me that I was wondering if we should allocate > our coroutine stacks with MAP_GROWSDOWN (though if we're > not actually using 1MB of stack then it's only going to > be eating virtual memory, not necessarily real memory.)
Yes, MAP_GROWSDOWN will not reduce RSS. It's possible that we can reduce RSS usage of the coroutine pool but it will require someone to profile the pool usage patterns. Stefan
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