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fangwen
Tux's lil' helper
Joined: 23 Oct 2011
Posts: 128
Location: Shanghai, China
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 Posted: Sun Nov 13, 2011 4:41 pm Post subject: About MAKEOPTS |
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I read Linux Kernel in a Nutshell and I had a question.
In Gentoo Handbook, the author wrote | Quote: | | With MAKEOPTS you define how many parallel compilations should occur when you install a package. A good choice is the number of CPUs (or CPU cores) in your system plus one, but this guideline isn't always perfect. |
But in LKN, the guidelines are | Quote: | To build the kernel in a multithreaded way, use the -j option to the make program. It is best to give a number to the -j option that corresponds to twice the number of processors in the system. So, for a machine with 2 processors present, use:
$
make -j4 |
Of course the Gentoo Handbook said it's not always perfect, so what do you think from your own experience?
Also, could anyone explain that in detail? |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54817
Location: 56N 3W
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| Posted: Sun Nov 13, 2011 6:27 pm Post subject: |
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fangwen,
Well, MAKEOPTS in make.conf applies to everything *except* the kernel, so they can both be right.
The kernel is a large number of small files, so more parallel makes may be better.
make.conf has to work with a much larger range of packages.
One thing is for sure, what suits one package will be sub optimal for another.
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Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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