On 14/02/14 09:42, Jean-Marc Lasgouttes wrote:
>> To compile with two cores, use
>> make -j2
>
> Actually, I find -j3 to be a bit better, maybe because there is less idle
> time.
yes, while one gcc process suspends for disk access (reading sources or writing
compiled objects), there's another one ready to process that can be scheduled on
its CPU, so overall compilation finishes earlier. And sometimes even -j4 may go
better on a dual-core.
It's only a pity that the linker doesn't take advantage of this, AFAICR this is
the only boring forcibly sequential phase that takes quite long, no matter if
you
have a 48-cores below you.
T.
