k8s.io/perf-tests/clusterloader2@v0.0.0-20240304094227-64bdb12da87e/pkg/measurement/common/network/performance-measurement-helper.go (about)

     1  /*
     2  Copyright 2021 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package network
    18  
    19  import (
    20  	"encoding/json"
    21  	"fmt"
    22  	"math"
    23  	"sort"
    24  
    25  	"k8s.io/apimachinery/pkg/runtime/schema"
    26  	"k8s.io/client-go/dynamic"
    27  	"k8s.io/client-go/dynamic/dynamicinformer"
    28  	"k8s.io/client-go/tools/cache"
    29  	"k8s.io/perf-tests/clusterloader2/pkg/measurement"
    30  	"k8s.io/perf-tests/clusterloader2/pkg/util"
    31  )
    32  
    33  func (npm *networkPerformanceMeasurement) validate(config *measurement.Config) error {
    34  	var err error
    35  	if npm.testDuration, err = util.GetDuration(config.Params, "duration"); err != nil {
    36  		return err
    37  	}
    38  	if npm.protocol, err = util.GetString(config.Params, "protocol"); err != nil {
    39  		return err
    40  	}
    41  	if npm.protocol != protocolTCP && npm.protocol != protocolUDP && npm.protocol != protocolHTTP {
    42  		return fmt.Errorf("invalid protocol , supported ones are TCP,UDP,HTTP")
    43  	}
    44  	if err = npm.validatePodConfiguration(config); err != nil {
    45  		return err
    46  	}
    47  	npm.podRatioType = npm.getPodRatioType()
    48  	return nil
    49  }
    50  
    51  func (npm *networkPerformanceMeasurement) validatePodConfiguration(config *measurement.Config) error {
    52  	var err error
    53  	if npm.numberOfClients, err = util.GetInt(config.Params, "numberOfClients"); err != nil {
    54  		return err
    55  	}
    56  	if npm.numberOfServers, err = util.GetInt(config.Params, "numberOfServers"); err != nil {
    57  		return err
    58  	}
    59  	if npm.numberOfClients <= 0 || npm.numberOfServers <= 0 {
    60  		return fmt.Errorf("invalid number of client or server pods")
    61  	}
    62  	return nil
    63  }
    64  
    65  func (npm *networkPerformanceMeasurement) getPodRatioType() string {
    66  	if npm.numberOfClients == npm.numberOfServers && npm.numberOfClients == 1 {
    67  		return oneToOne
    68  	}
    69  	if (npm.numberOfClients > npm.numberOfServers) && npm.numberOfServers == 1 {
    70  		return manyToOne
    71  	}
    72  	if npm.numberOfClients == npm.numberOfServers {
    73  		return manyToMany
    74  	}
    75  	return invalid
    76  }
    77  
    78  func (npm *networkPerformanceMeasurement) populateTemplate(podPair podPair, index int) map[string]interface{} {
    79  	return map[string]interface{}{
    80  		"index":                index,
    81  		"clientPodName":        podPair.sourcePodName,
    82  		"serverPodName":        podPair.destinationPodName,
    83  		"clientPodIP":          podPair.sourcePodIP,
    84  		"serverPodIP":          podPair.destinationPodIP,
    85  		"protocol":             npm.protocol,
    86  		"duration":             npm.testDuration.Seconds(),
    87  		"clientStartTimestamp": npm.startTimeStampForTestExecution,
    88  		"numberOfClients":      1,
    89  	}
    90  }
    91  
    92  func getInformer(namespace string, k8sClient dynamic.Interface, gvr schema.GroupVersionResource) (cache.SharedInformer, error) {
    93  	dynamicInformerFactory := dynamicinformer.NewFilteredDynamicSharedInformerFactory(k8sClient, 0, namespace, nil)
    94  	informer := dynamicInformerFactory.ForResource(gvr).Informer()
    95  	return informer, nil
    96  }
    97  
    98  type metricPercentiles struct {
    99  	percentile05 float64
   100  	percentile50 float64
   101  	percentile95 float64
   102  }
   103  
   104  type float64Slice []float64
   105  
   106  func (p float64Slice) Len() int           { return len(p) }
   107  func (p float64Slice) Less(i, j int) bool { return p[i] < p[j] }
   108  func (p float64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
   109  
   110  func getPercentile(values float64Slice) metricPercentiles {
   111  	length := len(values)
   112  	if length == 0 {
   113  		return metricPercentiles{0, 0, 0}
   114  	}
   115  	sort.Float64s(values)
   116  	perc05 := values[int(math.Ceil(float64(length*05)/100))-1]
   117  	perc50 := values[int(math.Ceil(float64(length*50)/100))-1]
   118  	perc95 := values[int(math.Ceil(float64(length*95)/100))-1]
   119  	return metricPercentiles{percentile05: perc05, percentile50: perc50, percentile95: perc95}
   120  }
   121  
   122  func getMetricResponse(metricMap map[string]interface{}, response *metricResponse) error {
   123  	body, err := json.Marshal(metricMap)
   124  	if err != nil {
   125  		return fmt.Errorf("error marshaling metricMap : %s", err)
   126  	}
   127  	if err = json.Unmarshal(body, response); err != nil {
   128  		return fmt.Errorf("error un-marshaling onto metricResponse: %s", err)
   129  	}
   130  	return nil
   131  }