[Bug target/59305] [4.9 Regression] gcc.dg/atomic/c11-atomic-exec-5.c fails with WARNING: program timed out on x86_64-apple-darwin13

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59305

--- Comment #14 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #13)
> > --- Comment #12 from Iain Sandoe <iains at gcc dot gnu.org> ---
> [...]
> > Do you repeat the findings we see on Darwin, where a heavily loaded system does
> > not exhibit the slow-down?
> 
> no, I see it both on unloaded and heavily loaded systems.  Even on an
> idle system, the runtime varies by a magnitude or more.

so the open question is whether there's a fault in the fall-back solution - or
whether it's fundamentally incapable of delivering reasonable performance (at
least on some non-linux platforms).