On Tue, Apr 03, 2007 at 10:30:47AM -0700, Ulrich Drepper wrote: > Andi Kleen wrote: > > Topology is dependent on the number of CPUs. > > Not all of it.
What is not? > We might add very limited caching (for a few > seconds) but that's as much as we can go. Hmm, e.g. in OpenMP you would have another thread that just reads /proc/cpuinfo in a loop and starts new threads on new CPUs? That sounds ...... "expensive" The other use case in glibc I know of is the Opteron optimized memcpy which can use different functions depending on the number of cores. But having a separate thread regularly rereading cpuinfo for memcpy also sounds quite crazy. -Andi - 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/
