Hi, Peter Chen <hzpeterchen@xxxxxxxxx> wrote: > 1. Does SMP technology can be only used at Dual-core processor, or > only Dual-core processor can get benefit from SMP technology? > Not only on dual-core CPUs, but also on SMT (HyperThreading) ones, if the SMT option in the kernel config is enabled. > 2. If mine cpu is single-core and I enabled SMP, which will happen? You will get some overhead in the spinlock code. On non-SMP kernel, a spinlock acquire is reduced to disabling preemption (if preemption is enabled, of course), or it's "compiled out" if there's not preemption at all. SMP adds "real" spinning (busy-waiting) code. -- Mircea -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
