[llvm-dev] LLD: time to enable --threads by default

[Rui Ueyama via llvm-dev]

On Thu, Nov 17, 2016 at 1:49 AM, Renato Golin <renato.golin at linaro.org>
wrote:

> On 17 November 2016 at 03:20, Rui Ueyama via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > Here is the result of running 20 threads on 20 physical cores (40 virtual
> > cores).
> >
> >       19002.081139 task-clock (msec)         #    2.147 CPUs utilized
> >       12738.416627 task-clock (msec)         #    1.000 CPUs utilized
>
> Sounds like threading isn't beneficial much beyond the second CPU...
> Maybe blindly creating one thread per core isn't the best plan...
>

That's an average. When it's at peak, it's using more than two cores.
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