Messages in this thread |  | | Date | Tue, 12 Dec 2000 06:20:26 +0100 (CET) | From | Mike Galbraith <> | Subject | Re: UP 2.2.18 makes kernels 3% faster than UP 2.4.0-test12 |
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On Mon, 11 Dec 2000, Steven Cole wrote:
> On Mon, 11 Dec 2000, Mike Galbraith wrote: > > On Mon, 11 Dec 2000, Steven Cole wrote: > > > I have a SMP (dual P-III 733Mhz) machine at work, but it will be > > > unavailable for testing for a few more days. I suspect that 2.4.0-test12 > > > will do better than 2.2.18 with 2 CPUs. I'll know in a few days. > [snip] > > > > I think it's better with -j. Do it with -jN where N is small enough > > to keep the box away from swap, and then repeat with N large enough to > > swap modestly (not too heavily or you're only testing disk MTBF:). > > I've always used make -j2 bzImage for my two processor machine. > I like being able to build kernels in a little over two minutes. > > Simple question here, and risking displaying great ignorance: > Does it make sense to use make -jN where N is much greater than the > number of CPUs?
If you're testing VM, definitely yes. Otherwise.. _not_ ;-)
-Mike
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