Is Total cpu usages of a node sum up of all pods running in specific nodes.what is the relation between millicpu in cpu cores and % of cpu usages of node.Is request and limit control the cpu usages of pods if so then if a pods cpu usages reach its limit then it will be killed and move other node or continues execution in similar node with maximum limit.
Millicores is an absolute number (one core divided by 1000). A given node typically has multiple cores, so the relation between the number of millicores and the total percentage varies. For example 1000 millicores (one core) would be 25% on a four core node, but 50% on a node with two cores.
Request determines how much cpu a pod is guaranteed. It will not be scheduled on a node unless the node can deliver that much.
Limit determines how much a pod can get. It will not be killed or moved if it exceeds the limit; it is simply not allowed to exceed the limit.