On Tue, Mar 06, 2001 at 06:03:57PM -0800, some SMTP stream spewed forth:
I read something (somewhere) about speeding up buildworlds with a ramdisk
mounted to /usr/obj *IF* you have a lot of RAM but I cant seem to find it
anymore. Any help? What are you guys doing to speed up your worlds? Are
I suppose you could do so. I have no experience with that, though.
Ram just recently became relatively cheap. ;-)
`du -d0 -c /usr/obj`
316617 /usr/obj
316617 total
people still passing -j# option to make or is that old school now?
Passing -j4 to my dual p3-500 didn't speed up buildworld at all but it speed
up the kernel build/install plenty. Unfortunately it broke the installworld
so I just did the installworld without the -j4 and it was fine. C'mon guys,
spit out the tips-n-tricks :)
I still pass the -j option, usually a -j4 for a single-proc Athlon 700
with 256MB ram. I have not actually checked to see if it sped stuff up. ;-)
Parallelizing installworld's is probably not going to work (as you have
seen), and I think that it is even suggested *not* to.
Heck, I even ran a -j64 once:
1229962.595u 3178499.752s 7:19:05.10 16733.5% 0+0k 52750+382894io
3616pf+477w
That slowed things down a whole bunch, seven hours.
I run a make -j4 buildworld/installword of -current on what has become
a daily basis. It is probably not a good idea to do so blindly without
tracking the lists.
dan
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