On Thu, Feb 17, 2000 at 12:49:19AM -0500, S. Salman Ahmed generated a stream of 1s and 0s: > >>>>> "d" == dan <[EMAIL PROTECTED]> writes: > d> I have been using pgcc compiled kernels since 2.2.x without any > d> problems. People should at least be aware that you can optimize > d> for your CPU with gcc 2.95.2 with -march=<pentium type> -O3 > d> -fomit-frame-pointer. > > I have an Intel Celeron 300A CPU on one machine, and an Intel Pentium II > 233 MHz MMX CPU on another machine. What -march setting should I use ? > > Thanks. > > -- > Salman Ahmed > ssahmed AT pathcom DOT com >
In your case a good idea would be -march=i686. Note in this case the resulting binary will be only running on PPro and above. Consult GCC info page fore more info. You can do -mcpu=i686 so that the resulting binary will be running on any CPU, but -march should be faster. For instance -march will use 'cmov' instruction which is only available on i686. A very important switch is -funroll-loops which sometimes provides very nice improvement, if not almost always, BUT it's known to be buggy sometimes. -- Get the truth or risk frying your brains! --> www.truthinlabeling.org <--
