package sectorstorage import ( "math" "github.com/filecoin-project/lotus/extern/sector-storage/storiface" ) func NewLowestUtilizationAssigner() Assigner { return &AssignerCommon{ WindowSel: LowestUtilizationWS, } } func LowestUtilizationWS(sh *Scheduler, queueLen int, acceptableWindows [][]int, windows []SchedWindow) int { scheduled := 0 rmQueue := make([]int, 0, queueLen) workerUtil := map[storiface.WorkerID]float64{} for sqi := 0; sqi < queueLen; sqi++ { task := (*sh.SchedQueue)[sqi] selectedWindow := -1 var needRes storiface.Resources var info storiface.WorkerInfo var bestWid storiface.WorkerID bestUtilization := math.MaxFloat64 // smaller = better for i, wnd := range acceptableWindows[task.IndexHeap] { wid := sh.OpenWindows[wnd].Worker w := sh.Workers[wid] res := w.Info.Resources.ResourceSpec(task.Sector.ProofType, task.TaskType) log.Debugf("SCHED try assign sqi:%d sector %d to window %d (awi:%d)", sqi, task.Sector.ID.Number, wnd, i) // TODO: allow bigger windows if !windows[wnd].Allocated.CanHandleRequest(task.SealTask(), res, wid, "schedAssign", w.Info) { continue } wu, found := workerUtil[wid] if !found { wu = w.Utilization() workerUtil[wid] = wu } if wu >= bestUtilization { // acceptable worker list is initially sorted by utilization, and the initially-best workers // will be assigned tasks first. This means that if we find a worker which isn't better, it // probably means that the other workers aren't better either. // // utilization // ^ // | / // | \ / // | \ / // | * // #--------> acceptableWindow index // // * -> we're here break } info = w.Info needRes = res bestWid = wid selectedWindow = wnd bestUtilization = wu } if selectedWindow < 0 { // all windows full continue } log.Debugw("SCHED ASSIGNED", "sqi", sqi, "sector", task.Sector.ID.Number, "task", task.TaskType, "window", selectedWindow, "worker", bestWid, "utilization", bestUtilization) workerUtil[bestWid] += windows[selectedWindow].Allocated.Add(task.SealTask(), info.Resources, needRes) windows[selectedWindow].Todo = append(windows[selectedWindow].Todo, task) rmQueue = append(rmQueue, sqi) scheduled++ } if len(rmQueue) > 0 { for i := len(rmQueue) - 1; i >= 0; i-- { sh.SchedQueue.Remove(rmQueue[i]) } } return scheduled }