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- // Copyright 2019 The Prometheus Authors
- // 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 procfs
- import (
- "fmt"
- "strconv"
- "strings"
- "github.com/prometheus/procfs/internal/util"
- )
- // LoadAvg represents an entry in /proc/loadavg
- type LoadAvg struct {
- Load1 float64
- Load5 float64
- Load15 float64
- }
- // LoadAvg returns loadavg from /proc.
- func (fs FS) LoadAvg() (*LoadAvg, error) {
- path := fs.proc.Path("loadavg")
- data, err := util.ReadFileNoStat(path)
- if err != nil {
- return nil, err
- }
- return parseLoad(data)
- }
- // Parse /proc loadavg and return 1m, 5m and 15m.
- func parseLoad(loadavgBytes []byte) (*LoadAvg, error) {
- loads := make([]float64, 3)
- parts := strings.Fields(string(loadavgBytes))
- if len(parts) < 3 {
- return nil, fmt.Errorf("malformed loadavg line: too few fields in loadavg string: %s", string(loadavgBytes))
- }
- var err error
- for i, load := range parts[0:3] {
- loads[i], err = strconv.ParseFloat(load, 64)
- if err != nil {
- return nil, fmt.Errorf("could not parse load '%s': %s", load, err)
- }
- }
- return &LoadAvg{
- Load1: loads[0],
- Load5: loads[1],
- Load15: loads[2],
- }, nil
- }
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