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The firmware has long made the NUMA topology available to the OS through ACPI tables.
by caf 8y ago
The firmware has long made the NUMA topology available to the OS through ACPI tables.
- rbanffy 8y agoHas a NUMA topology like this ever been used with Windows? They could be misinterpreting it. They have quite a reputation for partial buggy implementations of ACPI-related stuff that end up becoming de-facto standards.
- snuxoll 8y agoI think it's less a matter of misinterpreting the topology, and more that the Windows scheduler isn't prepared to handle the somewhat exotic topology; whereas the Linux scheduler seems to be more intelligent about handling the memory-less NUMA nodes.
- rbanffy 8y agoMemory-less NUMA nodes are present on the Xeon Phi (all non-HBM is on that node), so that looks like a good explanation. I don't think Windows can handle it.