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https://docs.microsoft.com/en-us/windows/win32/procthread/numa-support
NUMA Support. 05/31/2018; 5 minutes to read; ... It attempts to satisfy memory-allocation requests from within the node, but will allocate memory from other nodes if necessary. ... Like a thread ideal processor, the ideal node is a hint to the scheduler, which assigns the new process to the group that contains the requested node if possible.
https://pubs.vmware.com/vsphere-51/topic/com.vmware.vsphere.resmgmt.doc/GUID-BD4A462D-5CDC-4483-968B-1DCF103C4208.html
The NUMA scheduler accommodates such a virtual machine by having it span NUMA nodes. That is, it is split up as multiple NUMA clients, each of which is assigned to a node and then managed by the scheduler as a normal, non-spanning client. This can improve the performance of certain memory-intensive workloads with high locality.
https://queue.acm.org/detail.cfm?id=2513149
Aug 09, 2013 · NUMA (Non-Uniform Memory Access): An Overview NUMA becomes more common because memory controllers get close to execution units on microprocessors. Christoph Lameter, Ph.D. NUMA (non-uniform memory access) is the phenomenon that memory at various points in the address space of a processor have different performance characteristics.
https://en.wikipedia.org/wiki/Non-uniform_memory_access
Non-uniform memory access (NUMA) is a computer memory design used in multiprocessing, ... Support for NUMA in operating systems attempts to reduce the frequency of this kind of access by allocating processors and memory in NUMA-friendly ways and by avoiding scheduling and locking algorithms that make NUMA-unfriendly accesses necessary.
https://docs.openstack.org/nova/pike/admin/cpu-topologies.html
Non-uniform memory access (NUMA) NUMA is a derivative of the SMP design that is found in many multi-socket systems. In a NUMA system, system memory is divided into cells or nodes that are associated with particular CPUs. Requests for memory on other nodes are possible through an interconnect bus. However, bandwidth across this shared bus is ...
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/virtualization_tuning_and_optimization_guide/sect-virtualization_tuning_optimization_guide-numa-allocation_policy
If memory is overcommitted in strict mode and the guest does not have sufficient swap space, the kernel will kill some guest processes to retrieve additional memory. Red Hat recommends using preferred allocation and specifying a single nodeset (for example, nodeset='0') to prevent this situation.
https://iopscience.iop.org/article/10.1088/1742-6596/664/9/092010/pdf
Its process scheduler should also attempt to schedule a task to the CPU directly connected to the majority of that task’s memory. Basic support for a NUMA-aware scheduler first appeared for Linux in kernel 2.5, and evolved over time. The kernel’s NUMA support has …Cited by: 3
https://www.linux.org/threads/the-linux-kernel-configuring-the-kernel-part-4.8851/
Jun 16, 2014 · Next, we have a NUMA option (Numa Memory Allocation and Scheduler Support (NUMA)). This will allow the kernel to allocate memory used by the CPU on the local memory controller of the CPU. This support also makes the kernel more NUMA aware. Very few 32-bit systems need this feature, but some common 64-bit processors use this feature. I chose ...
https://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring/topic/392519
numactl has a "sort of allow an app to use numa disabled memory allocation when numa is enabled" option. For this option, when memory is allocated, the OS will round-robin pick a page from each node. So depending on your memory access details, one could end up having memory accesses which don't seem very "numa disabled".
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