From: Jeff Garzik <[EMAIL PROTECTED]> Date: Wed, 27 Jul 2005 23:44:51 -0400
> In x86-based CPUs at least (the largest tg3 platform), branch prediction > often prefers > > if (...) > direct_func_1() > else > direct_func_2() > > to > > tp->func() Indirect function calls also kill cpus such as ia64, which cannot avoid the implicit branch prediction miss unless the function method target is prefetched several instruction groups before the call and gcc does not emit the necessary directives to achieve this even if it were possible. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
