On Fri, Sep 29, 2006 at 09:07:19AM -0500, Astrodog wrote: > Personally, I find it much, much more important to be able to do an > installworld from a "real" single user mode via NFS, than it is to support > -j. I don't think I've ever had a circumstance where I really needed make > installworld to finish quickly. > This doesn't mean it's unused. For example, our release engineers build releases on fast SMP machines, and "make release" can complete faster with -j on real SMP hardware. This is btw how this bug was found in the first place. > Besides, if there's significant use of > locks in installworld, -j doesn't get a whole lot of performance gain > anyway. > No, it's insignificant. > Another thought here, is that in my experience, installworld is disk, or > network I/O bound, not CPU... Under those circumstances, we may find that > there's reduced performance with -j anyway, in which case there's no > reason to support it that I can see. > Do you have numbers on real SMP hardware to share? Cheers, -- Ruslan Ermilov ru_at_FreeBSD.org FreeBSD committer
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