github.com/kubewharf/katalyst-core@v0.5.3/pkg/util/machine/topology_linux.go (about) 1 //go:build linux 2 3 /* 4 Copyright 2022 The Katalyst Authors. 5 6 Licensed under the Apache License, Version 2.0 (the "License"); 7 you may not use this file except in compliance with the License. 8 You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 See the License for the specific language governing permissions and 16 limitations under the License. 17 */ 18 19 package machine 20 21 import ( 22 "fmt" 23 "io/ioutil" 24 "path/filepath" 25 "strconv" 26 "strings" 27 28 "github.com/kubewharf/katalyst-core/pkg/config/agent/global" 29 "github.com/kubewharf/katalyst-core/pkg/util/general" 30 ) 31 32 const ( 33 sysNodeDirectory = "/sys/devices/system/node" 34 ) 35 36 func GetExtraTopologyInfo(conf *global.MachineInfoConfiguration) (*ExtraTopologyInfo, error) { 37 fInfos, err := ioutil.ReadDir(sysNodeDirectory) 38 if err != nil { 39 return nil, fmt.Errorf("faield to ReadDir /sys/devices/system/node, err %s", err) 40 } 41 42 numaDistanceArray := make(map[int][]NumaDistanceInfo) 43 for _, fi := range fInfos { 44 if !fi.IsDir() { 45 continue 46 } 47 if !strings.HasPrefix(fi.Name(), "node") { 48 continue 49 } 50 51 nodeID, err := strconv.Atoi(fi.Name()[len("node"):]) 52 if err != nil { 53 general.Infof("/sys/devices/system/node/%s is not a node directory", fi.Name()) 54 continue 55 } 56 57 b, err := ioutil.ReadFile(filepath.Join("/sys/devices/system/node", fi.Name(), "distance")) 58 if err != nil { 59 return nil, err 60 } 61 s := strings.TrimSpace(strings.TrimRight(string(b), "\n")) 62 distances := strings.Fields(s) 63 var distanceArray []NumaDistanceInfo 64 for id, distanceStr := range distances { 65 distance, err := strconv.Atoi(distanceStr) 66 if err != nil { 67 return nil, err 68 } 69 distanceArray = append(distanceArray, NumaDistanceInfo{ 70 NumaID: id, 71 Distance: distance, 72 }) 73 } 74 numaDistanceArray[nodeID] = distanceArray 75 } 76 77 return &ExtraTopologyInfo{ 78 NumaDistanceMap: numaDistanceArray, 79 SiblingNumaInfo: GetSiblingNumaInfo(conf, numaDistanceArray), 80 }, nil 81 }