I am new to this list and hope this is the right place to ask this question. We are on process to check performance of a new hardware feature on NUMA system. I did a few experiments to check memory performance behavior on a two node NUMA system with the following SLIT: 10 21 21 10 The test does the following: allocate 1 GB buffer and access the buffer sequentially with a 256bytes stride, i.e. accessing Offset 0, 256, 512, ….. This test was performed while running on node 0 (using numa_run_on_node() API) done while accessing local node memory 0 and also remote node 1 memory (using(numa_alloc_onnode()) API). Surprisingly, the performance delta is about 15%: local memory test took 1800ms while the remote one took 2100ms. I expected much more. Two questions: Do these results look reasonable to you? Is there some kind of recommended and standard memory test for NUMA system? Thanks, Serge -- 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
