From: Andi Kleen <[EMAIL PROTECTED]> Date: 07 Feb 2007 10:54:49 +0100
> Probably Eric compiled with the now default CONFIG_CC_OPTIMIZE_FOR_SIZE/-Os. > With that gcc decides to use the shorter hardware divide instruction, even > though it is significantly slower than an expanded optimized sequence > for constant dividend. > > We've seen this in a few other cases while during performance regression > testing between kernels that still used -O2 vs the newer -Os. > > No good solution found unfortunately. Thanks for the explanation, that makes a lot of sense. - 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
