On Thu, Dec 9, 2010 at 11:59 AM, robert <[email protected]> wrote: > Stuart Stegall wrote: >> On Wed, Dec 8, 2010 at 7:45 PM, Ken Moffat <[email protected]> wrote: >>> On Wed, Dec 08, 2010 at 06:31:31PM -0600, robert wrote: >>>> >>>> No, I got the "me hopes" part ... quite Shakespearean, in fact ... as in >>>> methinks ... >>>> >>>> It's the "build itself" part ... still don't understand what that means. >>>> Do you mean just write up a script and cut it loose to build the os? >>>> >>> The idea (in the days of "iterative comparison analysis", and >>> before), was that a new LFS system should have everything it needed >>> to build itself, and that the result ought to be identical (in >>> practice, after stripping files, and removing the different >>> compressed timestamps from gzipped files, and some other "we don't >>> quite know why this always differs" files). >>> >>> So, some of us used to take a new development or pre-release >>> version, and let it build itself (or rebuild itself in-place for >>> Greg's version of ICA). With modern toolchains, I've given up doing >>> that because there were too many unexplainable differences, perhaps >>> caused by address randomization. >>> >>> ĸen >>> -- >>> das eine Mal als Tragödie, das andere Mal als Farce >>> -- >>> http://linuxfromscratch.org/mailman/listinfo/lfs-support >>> FAQ: http://www.linuxfromscratch.org/lfs/faq.html >>> Unsubscribe: See the above information page >>> >> >> The last sentance there hits the head on why ICA doesn't really work >> anymore. There's features in the kernel, glibc, binutils and gcc all >> of which will cause the build results to be slightly different each >> time. Heck, at work we're trying to figure out why our builds built >> over night run 2.3% faster than our builds during the day. And I'm >> not talking about the build itself, but the actual runtime. > > More body heat in the room. Less efficient processor. Laboring > processor. Less air current in the room, resulting in reduced electron > jiggle. My Fiat Spyder runs a good deal better at night, but maybe that > has to do with other factors.... > -- > http://linuxfromscratch.org/mailman/listinfo/lfs-support > FAQ: http://www.linuxfromscratch.org/lfs/faq.html > Unsubscribe: See the above information page >
My M3 runs better in the cold, and that has everything to do with cold. In this case though, this is in a temperature controlled Data Center with no competition for cycles. The program actually runs during the day, but if the build was done during the day, it will take a little bit longer, if it's done at night, it takes a bit less. Strangest thing I have ever experienced. -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
