volcano.sh/volcano@v1.9.0/pkg/scheduler/api/helpers/helpers.go (about)

     1  /*
     2  Copyright 2018 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 helpers
    18  
    19  import (
    20  	"math"
    21  
    22  	v1 "k8s.io/api/core/v1"
    23  
    24  	"volcano.sh/volcano/pkg/scheduler/api"
    25  )
    26  
    27  // Min is used to find the min of two resource types
    28  func Min(l, r *api.Resource) *api.Resource {
    29  	res := &api.Resource{}
    30  
    31  	res.MilliCPU = math.Min(l.MilliCPU, r.MilliCPU)
    32  	res.Memory = math.Min(l.Memory, r.Memory)
    33  
    34  	if l.ScalarResources == nil || r.ScalarResources == nil {
    35  		return res
    36  	}
    37  
    38  	res.ScalarResources = map[v1.ResourceName]float64{}
    39  	for lName, lQuant := range l.ScalarResources {
    40  		res.ScalarResources[lName] = math.Min(lQuant, r.ScalarResources[lName])
    41  	}
    42  
    43  	return res
    44  }
    45  
    46  // Max returns the resource object with larger value in each dimension.
    47  func Max(l, r *api.Resource) *api.Resource {
    48  	res := &api.Resource{}
    49  
    50  	res.MilliCPU = math.Max(l.MilliCPU, r.MilliCPU)
    51  	res.Memory = math.Max(l.Memory, r.Memory)
    52  
    53  	if l.ScalarResources == nil && r.ScalarResources == nil {
    54  		return res
    55  	}
    56  	res.ScalarResources = map[v1.ResourceName]float64{}
    57  	if l.ScalarResources != nil {
    58  		for lName, lQuant := range l.ScalarResources {
    59  			if lQuant > 0 {
    60  				res.ScalarResources[lName] = lQuant
    61  			}
    62  		}
    63  	}
    64  	if r.ScalarResources != nil {
    65  		for rName, rQuant := range r.ScalarResources {
    66  			if rQuant > 0 {
    67  				maxQuant := math.Max(rQuant, res.ScalarResources[rName])
    68  				res.ScalarResources[rName] = maxQuant
    69  			}
    70  		}
    71  	}
    72  	return res
    73  }
    74  
    75  // Share is used to determine the share
    76  func Share(l, r float64) float64 {
    77  	var share float64
    78  	if r == 0 {
    79  		if l == 0 {
    80  			share = 0
    81  		} else {
    82  			share = 1
    83  		}
    84  	} else {
    85  		share = l / r
    86  	}
    87  
    88  	return share
    89  }