Hi Ingo, On Mon, Mar 16, 2015 at 5:26 PM, Ingo Molnar <mi...@kernel.org> wrote: > > * Namhyung Kim <namhy...@kernel.org> wrote: > >> On Thu, Mar 12, 2015 at 11:58:37PM +0900, Namhyung Kim wrote: >> > On Thu, Mar 12, 2015 at 11:41:19AM +0100, Ingo Molnar wrote: >> > > So there's one thing that would be useful: to track pages allocated on >> > > one node, but freed on another. Those kinds of allocation/free >> > > patterns are especially expensive and might make sense to visualize. >> > >> > I think it can be done easily as slab analysis already contains the info. >> >> Hmm.. it seems slab events provide the node info but page events >> don't. Without it, I don't know which node a page is in so cannot >> determine such cross-node alloc+free patterns. > > Well, but we know the CPU that the allocation occured on, and can map > the CPU to the node.
Does it gaurantee that the page always belongs to a same node allocating cpu is in? I can simply map the page with an node using cpu info but was not sure whether that's always correct. Thanks, Namhyung -- 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/