func subtractFromNUMAs()

in pkg/noderesourcetopology/plugin.go [65:96]

• 24 lines of code
• 8 McCabe index (conditional complexity)

func subtractFromNUMAs(resources v1.ResourceList, numaNodes NUMANodeList, nodes ...int) {
	for resName, quantity := range resources {
		for _, node := range nodes {
			// quantity is zero no need to iterate through another NUMA node, go to another resource
			if quantity.IsZero() {
				break
			}

			nRes := numaNodes[node].Resources
			if available, ok := nRes[resName]; ok {
				switch quantity.Cmp(available) {
				case 0: // the same
					// basically zero container resources
					quantity.Sub(available)
					// zero NUMA quantity
					nRes[resName] = resource.Quantity{}
				case 1: // container wants more resources than available in this NUMA zone
					// substract NUMA resources from container request, to calculate how much is missing
					quantity.Sub(available)
					// zero NUMA quantity
					nRes[resName] = resource.Quantity{}
				case -1: // there are more resources available in this NUMA zone than container requests
					// substract container resources from resources available in this NUMA node
					available.Sub(quantity)
					// zero container quantity
					quantity = resource.Quantity{}
					nRes[resName] = available
				}
			}
		}
	}
}