Daniel Kristjansson schrieb: > The Northwood has a 512KB L2 cache, which should be sufficient for > -O2/-O3 to be faster than -Os. Generally the script is supposed to use > -Os for processors with 256 KB or smaller L2/L3 cache and -O2/-O3 for > ones with a 512KB or larger cache. The benchmarking I did for that > decision was with gcc 3.x. P4 based cores don't really need some > of the -O2/-O3 optimizations, like aligning jump targets, but some > of the newer processors like the Pentium-M and the Athlon chips do > benefit from the alignment; but they didn't seem to hurt with gcc 3.x. > > I have a Via c3-2 cpu and configure is always creating a generic config (pentiumpro + O3). Now I found out you have to use manually "--enable-proc-opt" to enable the cpu specific flags. What is the cause of this?
Kristian. _______________________________________________ mythtv-dev mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
