forked from kubewharf/katalyst-core
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
/*
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Copyright 2022 The Katalyst Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package process
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import (
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"fmt"
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"strconv"
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"strings"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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// CPUSetParse constructs an integer cpu set from a Linux CPU list formatted string.
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// See: http://man7.org/linux/man-pages/man7/cpuset.7.html#FORMATS
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func CPUSetParse(s string) (sets.Int, error) {
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if s == "" {
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return sets.Int{}, nil
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}
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b := sets.Int{}
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ranges := strings.Split(s, ",")
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for _, r := range ranges {
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boundaries := strings.Split(r, "-")
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if len(boundaries) == 1 {
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elem, err := strconv.Atoi(boundaries[0])
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if err != nil {
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return sets.Int{}, fmt.Errorf("parse index 0 of 1 boundaries failed: %w", err)
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}
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b.Insert(elem)
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} else if len(boundaries) == 2 {
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start, err := strconv.Atoi(boundaries[0])
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if err != nil {
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return sets.Int{}, fmt.Errorf("parse index 0 of 2 boundaries failed: %w", err)
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}
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end, err := strconv.Atoi(boundaries[1])
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if err != nil {
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return sets.Int{}, fmt.Errorf("parse index 1 of 2 boundaries failed: %w", err)
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}
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for e := start; e <= end; e++ {
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b.Insert(e)
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}
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}
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}
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return b, nil
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}
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