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Add network-topology-aware plugin and hyperNode score callback
Signed-off-by: ecosysbin <[email protected]>
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Jan 20, 2025
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210
pkg/scheduler/plugins/networktopologyaware/networktopologyaware.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
| /* | ||
| Copyright 2019 The Volcano Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
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| package networktopologyaware | ||
|
|
||
| import ( | ||
| "k8s.io/klog/v2" | ||
|
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| "volcano.sh/volcano/pkg/scheduler/api" | ||
| "volcano.sh/volcano/pkg/scheduler/framework" | ||
| "volcano.sh/volcano/pkg/scheduler/util" | ||
| ) | ||
|
|
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| const ( | ||
| // PluginName indicates name of volcano scheduler plugin. | ||
| PluginName = "networktopologyaware" | ||
| BaseScore = 100.0 | ||
| TaskBaseScore = 10.0 | ||
| ZeroScore = 0.0 | ||
| NetworkTopologyWeight = "weight" | ||
| ) | ||
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| type networkTopologyAwarePlugin struct { | ||
| // Arguments given for the plugin | ||
| pluginArguments framework.Arguments | ||
| *hyperNodesTier | ||
| } | ||
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| type hyperNodesTier struct { | ||
| maxTier int | ||
| minTier int | ||
| } | ||
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| func (h *hyperNodesTier) init(hyperNodesSetByTier []int) { | ||
| if len(hyperNodesSetByTier) == 0 { | ||
| return | ||
| } | ||
| h.minTier = hyperNodesSetByTier[0] | ||
| h.maxTier = hyperNodesSetByTier[len(hyperNodesSetByTier)-1] | ||
| } | ||
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| // New function returns prioritizePlugin object | ||
| func New(arguments framework.Arguments) framework.Plugin { | ||
| return &networkTopologyAwarePlugin{ | ||
| pluginArguments: arguments, | ||
| hyperNodesTier: &hyperNodesTier{}, | ||
| } | ||
| } | ||
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| func (nta *networkTopologyAwarePlugin) Name() string { | ||
| return PluginName | ||
| } | ||
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| func calculateWeight(args framework.Arguments) int { | ||
| weight := 1 | ||
| args.GetInt(&weight, NetworkTopologyWeight) | ||
| return weight | ||
| } | ||
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| func (nta *networkTopologyAwarePlugin) OnSessionOpen(ssn *framework.Session) { | ||
| klog.V(5).Infof("Enter networkTopologyAwarePlugin plugin ...") | ||
| defer func() { | ||
| klog.V(5).Infof("Leaving networkTopologyAware plugin ...") | ||
| }() | ||
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| weight := calculateWeight(nta.pluginArguments) | ||
| nta.hyperNodesTier.init(ssn.HyperNodesTiers) | ||
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| hyperNodeFn := func(job *api.JobInfo, hyperNodes map[string][]*api.NodeInfo) (map[string]float64, error) { | ||
| hyperNodeScores := make(map[string]float64) | ||
| jobAllocatedHyperNode := job.PodGroup.GetAnnotations()[api.JobAllocatedHyperNode] | ||
| if jobAllocatedHyperNode == "" { | ||
| for hyperNode := range hyperNodes { | ||
| hyperNodeScores[hyperNode] = ZeroScore | ||
| } | ||
| return hyperNodeScores, nil | ||
| } | ||
| // The job still has remaining tasks to be scheduled, calculate score based on LCAHyperNode tier. | ||
| maxScore := ZeroScore | ||
| scoreHyperNode := map[float64][]string{} | ||
| for hyperNode := range hyperNodes { | ||
| score := nta.networkTopologyAwareScore(hyperNode, jobAllocatedHyperNode, ssn.HyperNodes) | ||
| score *= float64(weight) | ||
| hyperNodeScores[hyperNode] = score | ||
| if score >= maxScore { | ||
| maxScore = score | ||
| scoreHyperNode[score] = append(scoreHyperNode[score], hyperNode) | ||
| } | ||
| } | ||
| // The job still has remaining tasks to be scheduled, calculate score based on task num when max score of hyperNode has more than one. | ||
| if len(scoreHyperNode[maxScore]) > 1 { | ||
| for hyperNode, score := range hyperNodeScores { | ||
| if score == maxScore { | ||
| taskNumScore := nta.networkTopologyAwareScoreWithTaskNum(hyperNode, job, ssn.RealNodesList) | ||
| taskNumScore *= float64(weight) | ||
| hyperNodeScores[hyperNode] += taskNumScore | ||
| } | ||
| } | ||
| } | ||
|
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| klog.V(1).Infof("networkTopologyAware score is: %v", hyperNodeScores) | ||
| return hyperNodeScores, nil | ||
| } | ||
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| nodeFn := func(task *api.TaskInfo, nodes []*api.NodeInfo) (map[string]float64, error) { | ||
| nodeScores := make(map[string]float64) | ||
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| for _, node := range nodes { | ||
| nodeScores[node.Name] = ZeroScore | ||
| } | ||
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| taskJob := ssn.Jobs[task.Job] | ||
| jobAllocatedHyperNode := taskJob.PodGroup.GetAnnotations()[api.JobAllocatedHyperNode] | ||
| if jobAllocatedHyperNode == "" { | ||
| return nodeScores, nil | ||
| } | ||
| // The job still has remaining tasks to be scheduled, calculate score based on LCAHyperNode tier. | ||
| maxScore := ZeroScore | ||
| scoreNodes := map[float64][]string{} | ||
| for _, node := range nodes { | ||
| hyperNode := util.FindHyperNodeOfNode(node.Name, ssn.RealNodesList, ssn.HyperNodesTiers, ssn.HyperNodesSetByTier) | ||
| score := nta.networkTopologyAwareScore(hyperNode, jobAllocatedHyperNode, ssn.HyperNodes) | ||
| score *= float64(weight) | ||
| nodeScores[node.Name] = score | ||
| if score >= maxScore { | ||
| maxScore = score | ||
| scoreNodes[score] = append(scoreNodes[score], node.Name) | ||
| } | ||
| } | ||
| // The job still has remaining tasks to be scheduled, calculate score based on task num when max score of hyperNode has more than one. | ||
| if maxScore != ZeroScore && len(scoreNodes[maxScore]) > 1 { | ||
| for node, score := range nodeScores { | ||
| if score == maxScore { | ||
| hyperNode := util.FindHyperNodeOfNode(node, ssn.RealNodesList, ssn.HyperNodesTiers, ssn.HyperNodesSetByTier) | ||
| taskNumScore := nta.networkTopologyAwareScoreWithTaskNum(hyperNode, taskJob, ssn.RealNodesList) | ||
| taskNumScore *= float64(weight) | ||
| nodeScores[node] += taskNumScore | ||
| } | ||
| } | ||
| } | ||
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| klog.V(1).Infof("networkTopologyAware score is: %v", nodeScores) | ||
| return nodeScores, nil | ||
| } | ||
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| ssn.AddHyperNodeOrederFn(nta.Name(), hyperNodeFn) | ||
| ssn.AddBatchNodeOrderFn(nta.Name(), nodeFn) | ||
| } | ||
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| func (bp *networkTopologyAwarePlugin) OnSessionClose(ssn *framework.Session) { | ||
| } | ||
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| // networkTopologyAwareScore use the best fit polices during scheduling. | ||
|
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| // Goals: | ||
| // - The tier of LCAHyperNode of job allocatedHyperNode should be as low as possible. | ||
| func (nta *networkTopologyAwarePlugin) networkTopologyAwareScore(hyperNodeName, jobAllocatedHyperNode string, hyperNodeMap api.HyperNodeInfoMap) float64 { | ||
| if hyperNodeName == jobAllocatedHyperNode { | ||
| return BaseScore | ||
| } | ||
| // Calculate hyperNode tier index score. | ||
| LCAHyperNode := hyperNodeMap.GetLCAHyperNode(hyperNodeName, jobAllocatedHyperNode) | ||
| hyperNodeInfo, ok := hyperNodeMap[LCAHyperNode] | ||
| if !ok { | ||
| return ZeroScore | ||
| } | ||
|
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| hyperNodeTierScore := BaseScore * scoreHyperNodeWithTier(hyperNodeInfo.Tier(), nta.minTier, nta.maxTier) | ||
| return hyperNodeTierScore | ||
| } | ||
|
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| // Goals: | ||
| // - Tasks under a job should be scheduled to one hyperNode as much as possible. | ||
| func (nta *networkTopologyAwarePlugin) networkTopologyAwareScoreWithTaskNum(hyperNodeName string, job *api.JobInfo, realNodesList map[string][]*api.NodeInfo) float64 { | ||
| taskNum := util.FindJobTaskNumOfHyperNode(hyperNodeName, job, realNodesList) | ||
| taskNumScore := ZeroScore | ||
| if len(job.Tasks) > 0 { | ||
| taskNumScore = TaskBaseScore * scoreHyperNodeWithTaskNum(taskNum, len(job.Tasks)) | ||
| } | ||
| return taskNumScore | ||
| } | ||
|
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| func scoreHyperNodeWithTier(tier int, minTier int, sumTier int) float64 { | ||
| // Use tier to calculate scores and map the original score to the range between 0 and 1. | ||
| if minTier == sumTier { | ||
| return ZeroScore | ||
| } | ||
| return float64(sumTier-tier) / float64(sumTier-minTier) | ||
| } | ||
|
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| func scoreHyperNodeWithTaskNum(taskNum int, allTaskNum int) float64 { | ||
| // Calculate task distribution rate as score and map the original score to the range between 0 and 1. | ||
| if allTaskNum == 0 { | ||
| return ZeroScore | ||
| } | ||
| return float64(taskNum) / float64(allTaskNum) | ||
| } |
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