mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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7f4fb34182
It is better developing vmctl tool in VictoriaMetrics repository, so it could be released together with the rest of vmutils tools such as vmalert, vmagent, vmbackup, vmrestore and vmauth.
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
// Copyright 2017 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package procfs
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"strconv"
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"strings"
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)
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// A BuddyInfo is the details parsed from /proc/buddyinfo.
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// The data is comprised of an array of free fragments of each size.
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// The sizes are 2^n*PAGE_SIZE, where n is the array index.
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type BuddyInfo struct {
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Node string
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Zone string
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Sizes []float64
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}
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// BuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem.
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func (fs FS) BuddyInfo() ([]BuddyInfo, error) {
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file, err := os.Open(fs.proc.Path("buddyinfo"))
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if err != nil {
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return nil, err
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}
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defer file.Close()
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return parseBuddyInfo(file)
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}
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func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
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var (
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buddyInfo = []BuddyInfo{}
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scanner = bufio.NewScanner(r)
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bucketCount = -1
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)
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for scanner.Scan() {
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var err error
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line := scanner.Text()
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parts := strings.Fields(line)
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if len(parts) < 4 {
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return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo")
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}
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node := strings.TrimRight(parts[1], ",")
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zone := strings.TrimRight(parts[3], ",")
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arraySize := len(parts[4:])
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if bucketCount == -1 {
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bucketCount = arraySize
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} else {
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if bucketCount != arraySize {
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return nil, fmt.Errorf("mismatch in number of buddyinfo buckets, previous count %d, new count %d", bucketCount, arraySize)
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}
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}
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sizes := make([]float64, arraySize)
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for i := 0; i < arraySize; i++ {
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sizes[i], err = strconv.ParseFloat(parts[i+4], 64)
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if err != nil {
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return nil, fmt.Errorf("invalid value in buddyinfo: %s", err)
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}
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}
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buddyInfo = append(buddyInfo, BuddyInfo{node, zone, sizes})
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}
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return buddyInfo, scanner.Err()
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}
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