Hi Wolfgang, On 02/11/11 17:54, Wolfgang Denk wrote: > U-Boot Makefiles contain a number of tests for compiler features etc. > which so far are executed again and again. On some architectures > (especially ARM) this results in a large number of calls to gcc. > > This patch makes sure to run such tests only once, thus largely > reducing the number of "execve" system calls. > > Example: number of "execve" system calls for building the "P2020DS" > (Power Architecture) and "qong" (ARM) boards, measured as: > -> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board> > -> grep execve /tmp/foo | wc -l > > Before: After: Reduction: > ================================== > P2020DS 20555 15205 -26% > qong 31692 14490 -54% > > As a result, built times are significantly reduced, typically by > 30...50%. > > Signed-off-by: Wolfgang Denk <[email protected]> > Cc: Andy Fleming <[email protected]> > Cc: Kumar Gala <[email protected]> > Cc: Albert Aribaud <[email protected]> > cc: Graeme Russ <[email protected]> > cc: Mike Frysinger <[email protected]> > ---
Tested on x86, does what is written on the box ;) Tested-by: Graeme Russ <[email protected]> Regards, Graeme _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
