On Saturday 11 Apr 2015 00:08:23 Peter Humphrey wrote:

> Back to the original theme, I'd been experimenting with -j and -l make
> options, and I suspect that was my real problem. I finished up with "-j
> -l20" on this i5 box, with startling results - 56 emerges in parallel for
> instance. I suspect that my problem stemmed from this.
> 
> All now seems stable so far with -j12 and no -l specified. Satisfactory CPU
> utilisation and the all-important stability.
> 
> So no, perl isn't broken  :)

On an early generation mobile i7 I have MAKEOPTS="-j5 -l12.8" with no 
noticeable adverse effects, although on recent mammoth emerges the 
responsiveness goes down when swap is used.  I can't even recall how I arrived 
at these settings.
-- 
Regards,
Mick