github.com/kubewharf/katalyst-core@v0.5.3/pkg/util/qos/cpu_enhancement.go (about)

     1  /*
     2  Copyright 2022 The Katalyst 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 qos
    18  
    19  import (
    20  	"fmt"
    21  	"math"
    22  	"strconv"
    23  
    24  	v1 "k8s.io/api/core/v1"
    25  
    26  	"github.com/kubewharf/katalyst-api/pkg/consts"
    27  	"github.com/kubewharf/katalyst-core/pkg/config/generic"
    28  )
    29  
    30  // GetPodCPUSuppressionToleranceRate parses cpu suppression tolerance rate for the given pod,
    31  // and cpu suppression is only supported for reclaim pods. if the given is not nominated with
    32  // cpu suppression, return max to indicate that it can be suppressed for any degree.
    33  func GetPodCPUSuppressionToleranceRate(qosConf *generic.QoSConfiguration, pod *v1.Pod) (float64, error) {
    34  	qosLevel, _ := qosConf.GetQoSLevel(pod, map[string]string{})
    35  	if qosLevel != consts.PodAnnotationQoSLevelReclaimedCores {
    36  		return 0, fmt.Errorf("qos level %s not support cpu suppression", qosLevel)
    37  	}
    38  
    39  	cpuEnhancement := qosConf.GetQoSEnhancementKVs(pod, map[string]string{}, consts.PodAnnotationCPUEnhancementKey)
    40  	suppressionToleranceRateStr, ok := cpuEnhancement[consts.PodAnnotationCPUEnhancementSuppressionToleranceRate]
    41  	if ok {
    42  		suppressionToleranceRate, err := strconv.ParseFloat(suppressionToleranceRateStr, 64)
    43  		if err != nil {
    44  			return 0, err
    45  		}
    46  		return suppressionToleranceRate, nil
    47  	}
    48  
    49  	return math.MaxFloat64, nil
    50  }