Steven Rostedt wrote: > In the thread "[RFC][PATCH] Make MAX_RT_PRIO and MAX_USER_RT_PRIO > configurable" I discovered that a C version of find_first_bit is faster > than the asm version
There are probably other cases of this in asm-i386/bitopts.h. For instance I think the "btl" instruction is pretty slow on modern CPUs so constant_test_bit() will probably outperform variable_test_bit() even if you feed it a non-constant "nr". I'd be happy to be proven wrong, though :-) When testing these optimizations you should also probably check the resulting vmlinux size. -Mitch - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
