Multiple CPUS versus one fast CPU
john at vector.os2.dhs.org
Sat Feb 9 01:44:08 UTC 2008
On 2008-02-07, Leslie Satenstein <lsatenstein at yahoo.com> 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
John (john at os2.dhs.org)
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