[ale] BogoMips uselsess?

[Chris Ricker]

On Tue, 4 May 1999, Glenn R. Stone wrote:

> Which leads me to the following related question:  is GNU make(1) smart enough 
> to take advantage of SMP?  I remember at GaTech we had a Sequent Symmetry we 
> could kick off make -P and snarf all ten processors on the thing.... emacs
> compiled in a trice.  One would love to turn a quad-Xeon loose on the kernel
> recompile.... can you say, way sub-sixty-seconds?  

use

make -j # bzImage

where # is the number of parallel compiles you want.  Given pipelining and
the fact that compiling is partially I/O bound, this is also useful on
single-cpu machines.  I've found that make -j 6 is optimal on my PII-450.
YMMV.

later,
chris

--
Chris Ricker                                               kaboom at gatech.edu
                                                  chris.ricker at m.cc.utah.edu