Martin Ichilevici de Oliveira <iomartin@xxxxxxxxxxxx> writes: > 1. What happens when I try to allocate 100 pages with a call like this: > > numa_alloc_interleaved(100 * numa_pagesize()) > > I can think of two possible allocation schemes: > a. Pages 0-24 are allocated to node 0, pages 25-49 are allocated to > node 1, pages 50-74 are allocated on node 2 and pages 75-99 are > allocated on node 3. > > b. Pages 0,4,8... are allocated on node 0, pages 1,5,9... are > allocated on node 1 and so on It's approximately (b) > 2. What's the effect of using numactl --interleaved=0,1,2,3 -- ./myprog? > I would assume it "substitutes" any malloc's to > numa_alloc_interleaved(), but I'm not sure if it's just that. Any page allocated by the process is interleaved in access order (which is different from what numa_alloc_interleaved does) -Andi -- ak@xxxxxxxxxxxxxxx -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
