On Fri, 5 Dec 2003, Merton Campbell Crockett wrote: > The only time that I've seen an SMP performance penalty is when you have > more than 5 or 6 processors. Up through 4 procesors there is a 1:1 > performance improvement. This is what has been experienced with BSD/OS. A > few other operating systems that we've tried didn't fair as well.
There is a 1:1 performance improvement while running a SMP kernel yes. But for a UP system there is a noticeable performance gain from running a UP kernel, especially on applications using a lot of system time. For applications mainly doing maths on the CPU the difference of a SMP vs UP kernel is negliable. But Squid is not such application. Regards Henrik
