>> Len Brown, a year ago: "The bottom line number to laptop users is >> battery lifetime. Just today somebody complained to me that Windows >> gets twice the battery life that Linux does." > > It seems the motivation for lower HZ is really: > > (1) ACPI/SMM suckage in laptops > > (2) NUMA systems with *horrible* remote memory latencies
It makes a difference on more normal SMP systems as well, just not as much. See earlier in the thread. The NUMA system I used as an example was actually a newer one with something like a 4:1 ratio, not an older one with 20:1 or so. I have a feeling it's more to do with the number of procs and the scheduler being invoked more than it is really to do with NUMA ratios. It seems people are agreed we want sub-HZ timers, and eventually go to tickless ... the question is more what to do in the meantime. M. - 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/
