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xen-devel
Re: [Xen-devel] How to minimize the compilation time of the XEN code
Keir Fraser wrote:
You can use the -j option to make to build in parallel, which speeds things
up quite a bit.
In my tests on a quad core Xeon, I found that it was fastest to have
more jobs than cores. That is, with my four cores, it was best to say
"-j 8".
The reason that works I think is that sometimes a job is blocked waiting
for I/O. During that time a compute-bound job can run. If you only
have as many jobs as cores, sometimes a core will be idle when its
process is blocked.
The best number of jobs will be highly dependent on your configuration
though. It's worthwhile to test using the "time" command:
time make -j 8
Mike
--
Michael David Crawford
mdc@xxxxxxxxx
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