Messages in this thread | | | Date | Tue, 12 Jan 1999 14:02:33 +0000 | From | Jamie Lokier <> | Subject | Re: (My) SMP lameness? |
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On Mon, Jan 11, 1999 at 09:02:33PM +0000, Matthew Kirkwood wrote: > On Mon, 11 Jan 1999, Stefan Laudat wrote: > > > Last evening I've decided to compile a new 2.2.0-pre6 on a Dual > > P][-350, WD SCSI 64Megs etc. It took me about 7 minutes, with the > > _existing_SMP_ 2.2.0-pre6. I have a K62/350 at home and it compiles > > the same kernel with _almost_ the same options in _almost_ the same time :( > > Do I have to get a different egcs/gcc in order to use both processors > > when compiling something or are there exxxtra options in order to enable > > some SMP extra stuff? I have to mention that a cat /proc/cpuinfo shows > > both processors so it has to be okay... > > Sorry if I am lame :) > > You probably want to do a "make -j N" to get the full benefit, where N is > about 2x no. of CPUs.
But beware. I have used `make -j 2' and `make -j 4' recently on my single processor system to speed up compiles. Subsequent makes rebuilt a lot of files, so I'm not sure that `make -j' was building everything properly.
-- Jamie
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