On 2008-02-07, Leslie Satenstein <lsatenstein@xxxxxxxxx> wrote: > There is a Queuing theory conclusion that one cpu at speed 2x is better= > than two cpus at speed x. > > The reason is that it takes overhead to schedule two and also each cpu ca= > n interfere with the other through locks, or memory access. > > But to reduce power consumption today, the trend is to 2 cpus at speed x.= > Increasing the speed causes a disproportionate increase in power consump= > tion. The two cpu solution generally uses less power. > > What is the difference expected in performance? I think it would depend on what sort of processes are running. For interrupt-dependent processes, have two cpus doubles the available interrupts. -- John (john@xxxxxxxxxxx)
