cpu.go

Documentation: github.com/containerd/cgroups/v2

     1  /*
     2     Copyright The containerd 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 v2
    18  
    19  import (
    20  	"math"
    21  	"strconv"
    22  	"strings"
    23  )
    24  
    25  type CPUMax string
    26  
    27  func NewCPUMax(quota *int64, period *uint64) CPUMax {
    28  	max := "max"
    29  	if quota != nil {
    30  		max = strconv.FormatInt(*quota, 10)
    31  	}
    32  	return CPUMax(strings.Join([]string{max, strconv.FormatUint(*period, 10)}, " "))
    33  }
    34  
    35  type CPU struct {
    36  	Weight *uint64
    37  	Max    CPUMax
    38  	Cpus   string
    39  	Mems   string
    40  }
    41  
    42  func (c CPUMax) extractQuotaAndPeriod() (int64, uint64) {
    43  	var (
    44  		quota  int64
    45  		period uint64
    46  	)
    47  	values := strings.Split(string(c), " ")
    48  	if values[0] == "max" {
    49  		quota = math.MaxInt64
    50  	} else {
    51  		quota, _ = strconv.ParseInt(values[0], 10, 64)
    52  	}
    53  	period, _ = strconv.ParseUint(values[1], 10, 64)
    54  	return quota, period
    55  }
    56  
    57  func (r *CPU) Values() (o []Value) {
    58  	if r.Weight != nil {
    59  		o = append(o, Value{
    60  			filename: "cpu.weight",
    61  			value:    *r.Weight,
    62  		})
    63  	}
    64  	if r.Max != "" {
    65  		o = append(o, Value{
    66  			filename: "cpu.max",
    67  			value:    r.Max,
    68  		})
    69  	}
    70  	if r.Cpus != "" {
    71  		o = append(o, Value{
    72  			filename: "cpuset.cpus",
    73  			value:    r.Cpus,
    74  		})
    75  	}
    76  	if r.Mems != "" {
    77  		o = append(o, Value{
    78  			filename: "cpuset.mems",
    79  			value:    r.Mems,
    80  		})
    81  	}
    82  	return o
    83  }
    84
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