[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] NUMA problem with AMD G34 system
Brian Marcotte wrote: I also considered more possible action back then, but found that it is probably not worth the effort, as this kind of configuration was considered kind of bogus. But a warning message sounds like a good idea.I prepared Xen to handle this situation (nodes without memory) before the M-C launch, before that it simply crashed. I agree that it is not obvious that you need to populate at least 4 DIMMs per CPU.I suppose that Xen could arrange the cpu to node mapping such that the memoryless CPUs were assigned to the "nearest" node making it so you could benefit from the shared L3 cache. I don't know that it's worth anyone's time though. Perhaps a warning would suffice? Yes, just put all the DIMMs in the blue slots of the first CPU and boot Xen with maxcpus=8. This should give you the best results without much fiddling with the hardware.Do you have only 4 DIMMs?Yes, but I don't expect that to last too long. We find that over the lifetime of a machine, we max out the RAM slots long before we run out of CPU. The second CPU is mostly just so we can (eventually) fill all the RAM slots. It's not a problem to run with one CPU for while. I may also just pin the domains to particular CPU cores rather than pull the CPU. Regards, Andre. -- Andre Przywara AMD-Operating System Research Center (OSRC), Dresden, Germany _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |