forked from kubewharf/katalyst-core
76 lines
2.0 KiB
Go
76 lines
2.0 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 machine
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import (
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"io/ioutil"
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"regexp"
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"strings"
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"github.com/pkg/errors"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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const cpuInfoPath = "/proc/cpuinfo"
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var (
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avx2RegExp = regexp.MustCompile(`^flags\s*:.* (avx2 .*|avx2)$`)
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avx512RegExp = regexp.MustCompile(`^flags\s*:.* (avx512 .*|avx512)$`)
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)
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type ExtraCPUInfo struct {
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// SupportInstructionSet instructions all cpus support.
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SupportInstructionSet sets.String
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}
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// GetExtraCPUInfo get extend cpu info from proc system
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func GetExtraCPUInfo() (*ExtraCPUInfo, error) {
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cpuInfo, err := ioutil.ReadFile(cpuInfoPath)
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if err != nil {
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return nil, errors.Wrapf(err, "could not read file %s", cpuInfoPath)
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}
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return &ExtraCPUInfo{
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SupportInstructionSet: getCPUInstructionInfo(string(cpuInfo)),
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}, nil
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}
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// getCPUInstructionInfo get cpu instruction info by parsing flags with "avx2", "avx512".
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func getCPUInstructionInfo(cpuInfo string) sets.String {
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supportInstructionSet := make(sets.String)
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for _, line := range strings.Split(cpuInfo, "\n") {
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if line == "" {
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continue
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}
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// whether flags match avx2, if matched we think this
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// machine is support avx2 instruction
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if avx2RegExp.MatchString(line) {
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supportInstructionSet.Insert("avx2")
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}
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// whether flags match avx2, if matched we think this
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// machine is support avx512 instruction
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if avx512RegExp.MatchString(line) {
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supportInstructionSet.Insert("avx512")
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}
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}
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return supportInstructionSet
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}
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