On Mon, 16 Jul 2007, Linus Torvalds wrote: > > Btw, are there any numbers on this? Is this whole thing actually > noticeable?
Besides the obvious removal of code? The old way actually made an effort to create per_cpu tasklets! So that the tasklets *can* run simultaneously, making it in essense a softirq. Since tasklets are implemented by the softirq, with a lot of code to make a tasklet function run only on one CPU at a time, and it can run on any CPU. By converting the rcu tasklet (which had work to make it act like a softirq) to just be a softirq, we removed all the extra overhead of a tasklet. But to answer your question. No, I didn't take any actual measurements. The changes just seemed obvious to me (and others). -- Steve - 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/
