Improve worker selection a bit

extern/sector-storage/sched.go

@@ -437,6 +437,10 @@ func (sh *scheduler) trySched() {
 			log.Debugf("SCHED ASSIGNED sqi:%d sector %d task %s to window %d", sqi, task.sector.Number, task.taskType, wnd)
 
 			windows[wnd].allocated.add(wr, needRes)
+			// TODO: We probably want to re-sort acceptableWindows here based on new
+			//  workerHandle.utilization + windows[wnd].allocated.utilization (workerHandle.utilization is used in all
+			//  task selectors, but not in the same way, so need to figure out how to do that in a non-O(n^2 way), and
+			//  without additional network roundtrips (O(n^2) could be avoided by turning acceptableWindows.[] into heaps))
 
 			selectedWindow = wnd
 			break

extern/sector-storage/sched_resources.go

@@ -108,3 +108,17 @@ func (a *activeResources) utilization(wr storiface.WorkerResources) float64 {
 
 	return max
 }
+
+func (wh *workerHandle) utilization() float64 {
+	wh.lk.Lock()
+	u := wh.active.utilization(wh.info.Resources)
+	u += wh.preparing.utilization(wh.info.Resources)
+	wh.lk.Unlock()
+	wh.wndLk.Lock()
+	for _, window := range wh.activeWindows {
+		u += window.allocated.utilization(wh.info.Resources)
+	}
+	wh.wndLk.Unlock()
+
+	return u
+}

extern/sector-storage/selector_alloc.go

@@ -59,7 +59,7 @@ func (s *allocSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt abi
 }
 
 func (s *allocSelector) Cmp(ctx context.Context, task sealtasks.TaskType, a, b *workerHandle) (bool, error) {
-	return a.active.utilization(a.info.Resources) < b.active.utilization(b.info.Resources), nil
+	return a.utilization() < b.utilization(), nil
 }
 
 var _ WorkerSelector = &allocSelector{}

extern/sector-storage/selector_existing.go

@@ -61,7 +61,7 @@ func (s *existingSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt
 }
 
 func (s *existingSelector) Cmp(ctx context.Context, task sealtasks.TaskType, a, b *workerHandle) (bool, error) {
-	return a.active.utilization(a.info.Resources) < b.active.utilization(b.info.Resources), nil
+	return a.utilization() < b.utilization(), nil
 }
 
 var _ WorkerSelector = &existingSelector{}

extern/sector-storage/selector_task.go

@@ -42,7 +42,7 @@ func (s *taskSelector) Cmp(ctx context.Context, _ sealtasks.TaskType, a, b *work
 		return len(atasks) < len(btasks), nil // prefer workers which can do less
 	}
 
-	return a.active.utilization(a.info.Resources) < b.active.utilization(b.info.Resources), nil
+	return a.utilization() < b.utilization(), nil
 }
 
 var _ WorkerSelector = &allocSelector{}