No, standard optimisation is -O2, the -O3 is unrolling all loops so that CPUs do less guessing and more crunching more like a RISC. There is more about the K7 opts... pplus there is some errata teh compiler may need manually be notified of. The K7 has also some power management, you want probably to disable it in the kernel too. Some bugs manifest as a combination of a specific code features, compiler features and processor features.
And BTW, there is this 586 and i686 processor option difference, are you sure you want to have 586 only? (without MMX etc...) On 11/9/07, Alex Joni <[EMAIL PROTECTED]> wrote: > nice catch anyway :) > > Regards, > Alex > > > > > On Fri, 9 Nov 2007, Mario. wrote: > > > >> optimisations are not the main thing.. CPU power management and > >> chipsets (and their unreachable configuration) cause a large part of > >> the lag in interrupts. I also compiled with the -O3 option and other > >> goodies and on several attempts it ran, ran like hell. > > > > Oh, well, from -O0 and -O3 I really hope there's difference :D > > But the compilation changes are more like for cache lines and instruction > > reordering... > > Someway gcc tuned for the K7 gives bad code for emcmot... or maybe in some > > way the options are not correctly propagated from the main kernel to the > > emc build system? I don't know since it doesn't print the effective gcc > > line in use (I'm sure there's a switch somewhere in the makefile). > > > > Anyway, since I still have a lot of cpu to burn, I'm keeping it to pentium > > classic. > > > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Splunk Inc. > > Still grepping through log files to find problems? Stop. > > Now Search log events and configuration files using AJAX and a browser. > > Download your FREE copy of Splunk now >> http://get.splunk.com/ > > _______________________________________________ > > Emc-developers mailing list > > Emc-developers@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.5.503 / Virus Database: 269.15.26/1119 - Release Date: > > 11/8/2007 5:55 PM > > > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
