mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-15 10:51:45 +03:00
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
// Copyright 2017 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 (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// A BuddyInfo is the details parsed from /proc/buddyinfo.
|
|
// The data is comprised of an array of free fragments of each size.
|
|
// The sizes are 2^n*PAGE_SIZE, where n is the array index.
|
|
type BuddyInfo struct {
|
|
Node string
|
|
Zone string
|
|
Sizes []float64
|
|
}
|
|
|
|
// NewBuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem.
|
|
func (fs FS) BuddyInfo() ([]BuddyInfo, error) {
|
|
file, err := os.Open(fs.proc.Path("buddyinfo"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
return parseBuddyInfo(file)
|
|
}
|
|
|
|
func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
|
|
var (
|
|
buddyInfo = []BuddyInfo{}
|
|
scanner = bufio.NewScanner(r)
|
|
bucketCount = -1
|
|
)
|
|
|
|
for scanner.Scan() {
|
|
var err error
|
|
line := scanner.Text()
|
|
parts := strings.Fields(line)
|
|
|
|
if len(parts) < 4 {
|
|
return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo")
|
|
}
|
|
|
|
node := strings.TrimRight(parts[1], ",")
|
|
zone := strings.TrimRight(parts[3], ",")
|
|
arraySize := len(parts[4:])
|
|
|
|
if bucketCount == -1 {
|
|
bucketCount = arraySize
|
|
} else {
|
|
if bucketCount != arraySize {
|
|
return nil, fmt.Errorf("mismatch in number of buddyinfo buckets, previous count %d, new count %d", bucketCount, arraySize)
|
|
}
|
|
}
|
|
|
|
sizes := make([]float64, arraySize)
|
|
for i := 0; i < arraySize; i++ {
|
|
sizes[i], err = strconv.ParseFloat(parts[i+4], 64)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid value in buddyinfo: %s", err)
|
|
}
|
|
}
|
|
|
|
buddyInfo = append(buddyInfo, BuddyInfo{node, zone, sizes})
|
|
}
|
|
|
|
return buddyInfo, scanner.Err()
|
|
}
|