> I would expect a processor to fetch the zero page cachelines from the l3 > cache from other sockets avoiding memory transactions altogether. The zero > page is likely in use somewhere so no typically no memory accesses should > occur in a system.
It depends on how effectively the workload uses the caches. If something is a cache pig of the L3 cache, then even shareable cache lines may need to be refetched regularly. But if your workloads spends a significant part of its time reading from zero page read only data there is something wrong with the workload. I would do some data profiling first to really prove that is the case. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
