Em Fri, Aug 26, 2005 at 09:06:22PM -0700, Mitchell Blank Jr escreveu: > Andi Kleen wrote: > > - it doesn't seem to help that much on modern CPUs with good > > branch prediction and big icaches anyways. > > Really? I would think that as pipelines get deeper (although that trend > seems to have stopped, thankfully) and Icache-miss penalties get relatively > larger we'd see unlikely() becoming MORE of a benefit, not less. Storing > the used part of a "hot" function in 1 Icacheline instead of 4 seems like > an obvious win. > > Personally I've never found unlikely() to be ugly; if anything I think > it serves as a nice little human-readable comment about whats going on > in the control-flow. I guess I'm in the minority on that one, though.
Hey, even if unlikely was: #define unlikely(x) (x) I'd find it useful :-) - Arnaldo - 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/