Re: [gentoo-user] emerge -j, make -j and make -l

[Michael Mol]

On Mon, Nov 28, 2011 at 1:51 PM, Michael Mol <mikemol@×××××.com> wrote:
> On Mon, Nov 28, 2011 at 12:26 AM, Pandu Poluan <pandu@××××××.info> wrote:

[snip]

> FWIW, I strongly suspect that N should be your number of *logical*
> cores, not your number of physical cores. I believe most of the
> overhead

...and finishing my sentence.

I believe most of the overhead comes from context switching between
two threads, and hyperthreading adds CPU hardware specifically for the
purpose of avoiding that costly context switch when controlling which
thread's instructions get sent up the pipeline.


-- 
:wq