On Thu, Aug 18, 2011 at 6:51 PM, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote: > Hi, > > I have a SuperMicro X8DTH-6F motherboard with 2 cpus it has NUMA options in > the BIOS; what parameters/should I be using for the NUMA options in the > kernel? > > | | [*] Numa Memory Allocation and Scheduler Support | | > | | [ ] Old style AMD Opteron NUMA detection | | > | | [*] ACPI NUMA detection | | > | | [ ] NUMA emulation | | > | | (6) Maximum NUMA Nodes (as a power of 2) | | > That is Intel processor, right? If so, the things you selected here are enough, the rest two is not what you need. > Specifically, the maximum number of NUMA nodes? Will this help to increase > performance of large memory allocations/is there any downside > to enabling this feature? The max of NUMA nodes is specified by CONFIG_NODES_SHIFT, in your case, it is 6, which means it supports up to 2^6 nodes. If your hardware supports NUMA, yes, that certainly help to increase the performance. Thanks. -- 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
