Dominik Bozek wrote: > Hi all, > > I have done a test of memcpy() and __copy_tofrom_user() on the mpc8313. > And the major conclusion is that __copy_tofrom_user is more efficient > than memcpy. Sometimes about 40%.
Have you looked at the two implementations? I'm not as well-versed on PPC as ARM, but I know the latter's __copy_* functions are optimized to be almost unintelligible. If your benchmark memcpy() implementation isn't, then you aren't comparing apples-to-apples. 40% improvement is within what I could imagine getting from a hand-crafted, no-holds-barred memcpy() implementation. I'd look more carefully at that code. b.g. -- Bill Gatliff [EMAIL PROTECTED] _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
