On Mon, 31 Oct 2011, Mark Hatle wrote: > On 10/30/11 11:15 AM, Robert P. J. Day wrote: > > On Sun, 30 Oct 2011, Christian Gagneraud wrote: > > > >> On 30/10/11 15:32, Robert P. J. Day wrote: > >>> > >>> all the docs recommend twice the number of cores (AFAICT), yet the > >>> template local.conf file suggests that, for a quad core, the value of > >>> 4 would be appropriate. shouldn't that say 8? same with > >>> PARALLEL_MAKE? > >> > >> Hi Robert, > >> > >> The Poky ref manual says (rule of thumb) x2 for BB_NUMBER_THREADS, > >> and x1.5 for PARALLEL_MAKE. > > > > if that's the case, anyone object to my submitting a patch to > > update local.conf.sample appropriately? > > > > rday > > > > I agree the manual and local.conf files should match. The issue > seems to be that the perfect values are subjective. Things like > memory, disk speed, chipset latency, and of course processor > speed/cores all affect the optimal setting. But we do need a > consistent rule of thumb.. I myself usually use x2 for both THREADS > and MAKE.
that's what i would normally use, assuming that having an overly high value for either of those settings can't possibly hurt. if that's the consensus, i can adjust the references to say 2x everywhere that i know of. just let me know. rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ======================================================================== _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto