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List:       linux-smp
Subject:    Re: dual celeron info request
From:       Dick Balaska <dick () buckosoft ! com>
Date:       1999-03-31 15:50:50
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Robert Resch wrote:
> 
> To put Linux into dual-Processiong you have not only to
> uncomment the "smp = 1" line. you also should replace the line
> "make = make" with "make = make -j 2" to support the two cpu's
> in the compile-process.

In my measurements, i have discovered that `make -j 2` provides little
or no speed improvements.  `make -j` however, does.
(not the kernel:)
-j 1  32.6 seconds
-j 2  32.7
-j 3  33.6
-j 4  32.8
-j    18.4

Not that i understand why spawning 20 compiles at a time is the only way
to see improvement.
(2PPro/200 Tyan S1662D slakware 3.6 K:2.2.0-final egcs 1.0.3)
-- 
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