Yarn 之 numa-awareness

NUMA Awareness

src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/numa/NumaResourceAllocator.java

  private NumaResourceAllocation allocate(ContainerId containerId,
      Resource resource) {
    for (int index = 0; index < numaNodesList.size(); index++) {
      NumaNodeResource numaNode = numaNodesList
          .get((currentAssignNode + index) % numaNodesList.size());
      if (numaNode.isResourcesAvailable(resource)) {
        numaNode.assignResources(resource, containerId);
        LOG.info("Assigning NUMA node " + numaNode.getNodeId() + " for memory, "
            + numaNode.getNodeId() + " for cpus for the " + containerId);
        currentAssignNode = (currentAssignNode + index + 1)
            % numaNodesList.size();
        return new NumaResourceAllocation(numaNode.getNodeId(),
            resource.getMemorySize(), numaNode.getNodeId(),
            resource.getVirtualCores());
      }
    }