--On 30 October 2012 22:59 +1100 Jan Mikkelsen <j...@transactionware.com> wrote:

-O2 -pthread -lc_r

They're now compiled under 9.0-S with just:

-O2 -pthread

libc_r is a user mode implementation of pthreads, so there is one actual
kernel thread with a stack. You now have ~700 kernel threads on startup.
Per-thread stack allocation will be different, and you could quite easily
explain differences that way.

That seems the most fitting explanation so far - aside from seeing if I can cut back on the number of threads, I presume there's no "issue" with having that many kicking around - the RES size is still quite 'small' (still waiting to see if anything is 'leaking') - and if ~700 threads happily ran under user mode pthreads - it should still perform at least 'similarly' with kernel threading?

-Karl
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