lotus/storage/sealer/sched_assigner_utilization.go

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package sealer
import (
"math"
"github.com/filecoin-project/lotus/storage/sealer/storiface"
)
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func NewLowestUtilizationAssigner() Assigner {
return &AssignerCommon{
WindowSel: LowestUtilizationWS,
}
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}
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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]
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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])
}
}
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return scheduled
}