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// Copyright 2024 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metrics
// This file contain code to extract host information on linux from
// /proc/cpuinfo and /proc/meminfo relevant to machine performance
import (
"io/ioutil"
"strings"
"android/soong/finder/fs"
)
type fillable interface {
fillInfo(key, value string)
}
func NewCpuInfo(fileSystem fs.FileSystem) (*CpuInfo, error) {
c := &CpuInfo{}
if err := parseFile(c, "/proc/cpuinfo", true, fileSystem); err != nil {
return &CpuInfo{}, err
}
return c, nil
}
func NewMemInfo(fileSystem fs.FileSystem) (*MemInfo, error) {
m := &MemInfo{}
if err := parseFile(m, "/proc/meminfo", false, fileSystem); err != nil {
return &MemInfo{}, err
}
return m, nil
}
func parseFile(obj fillable, fileName string, endOnBlank bool, fileSystem fs.FileSystem) error {
fd, err := fileSystem.Open(fileName)
if err != nil {
return err
}
defer fd.Close()
data, err := ioutil.ReadAll(fd)
if err != nil {
return err
}
for _, l := range strings.Split(string(data), "\n") {
if !strings.Contains(l, ":") {
// Terminate after the first blank line.
if endOnBlank && strings.TrimSpace(l) == "" {
break
}
// If the line is not of the form "key: values", just skip it.
continue
}
kv := strings.SplitN(l, ":", 2)
obj.fillInfo(strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1]))
}
return nil
}
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