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| 1 | +// Copyright 2022 The Prometheus Authors |
| 2 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 3 | +// you may not use this file except in compliance with the License. |
| 4 | +// You may obtain a copy of the License at |
| 5 | +// |
| 6 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 7 | +// |
| 8 | +// Unless required by applicable law or agreed to in writing, software |
| 9 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 10 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 11 | +// See the License for the specific language governing permissions and |
| 12 | +// limitations under the License. |
| 13 | + |
| 14 | +package procfs |
| 15 | + |
| 16 | +import ( |
| 17 | + "bufio" |
| 18 | + "bytes" |
| 19 | + "fmt" |
| 20 | + "io" |
| 21 | + "strconv" |
| 22 | + "strings" |
| 23 | + |
| 24 | + "github.com/prometheus/procfs/internal/util" |
| 25 | +) |
| 26 | + |
| 27 | +// Softirqs represents the softirq statistics. |
| 28 | +type Softirqs struct { |
| 29 | + Hi []uint64 |
| 30 | + Timer []uint64 |
| 31 | + NetTx []uint64 |
| 32 | + NetRx []uint64 |
| 33 | + Block []uint64 |
| 34 | + IRQPoll []uint64 |
| 35 | + Tasklet []uint64 |
| 36 | + Sched []uint64 |
| 37 | + HRTimer []uint64 |
| 38 | + RCU []uint64 |
| 39 | +} |
| 40 | + |
| 41 | +func (fs FS) Softirqs() (Softirqs, error) { |
| 42 | + fileName := fs.proc.Path("softirqs") |
| 43 | + data, err := util.ReadFileNoStat(fileName) |
| 44 | + if err != nil { |
| 45 | + return Softirqs{}, err |
| 46 | + } |
| 47 | + |
| 48 | + reader := bytes.NewReader(data) |
| 49 | + |
| 50 | + return parseSoftirqs(reader) |
| 51 | +} |
| 52 | + |
| 53 | +func parseSoftirqs(r io.Reader) (Softirqs, error) { |
| 54 | + var ( |
| 55 | + softirqs = Softirqs{} |
| 56 | + scanner = bufio.NewScanner(r) |
| 57 | + ) |
| 58 | + |
| 59 | + if !scanner.Scan() { |
| 60 | + return Softirqs{}, fmt.Errorf("softirqs empty") |
| 61 | + } |
| 62 | + |
| 63 | + for scanner.Scan() { |
| 64 | + parts := strings.Fields(scanner.Text()) |
| 65 | + var err error |
| 66 | + |
| 67 | + // require at least one cpu |
| 68 | + if len(parts) < 2 { |
| 69 | + continue |
| 70 | + } |
| 71 | + switch { |
| 72 | + case parts[0] == "HI:": |
| 73 | + perCpu := parts[1:] |
| 74 | + softirqs.Hi = make([]uint64, len(perCpu)) |
| 75 | + for i, count := range perCpu { |
| 76 | + if softirqs.Hi[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 77 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (HI%d): %w", count, i, err) |
| 78 | + } |
| 79 | + } |
| 80 | + case parts[0] == "TIMER:": |
| 81 | + perCpu := parts[1:] |
| 82 | + softirqs.Timer = make([]uint64, len(perCpu)) |
| 83 | + for i, count := range perCpu { |
| 84 | + if softirqs.Timer[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 85 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (TIMER%d): %w", count, i, err) |
| 86 | + } |
| 87 | + } |
| 88 | + case parts[0] == "NET_TX:": |
| 89 | + perCpu := parts[1:] |
| 90 | + softirqs.NetTx = make([]uint64, len(perCpu)) |
| 91 | + for i, count := range perCpu { |
| 92 | + if softirqs.NetTx[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 93 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (NET_TX%d): %w", count, i, err) |
| 94 | + } |
| 95 | + } |
| 96 | + case parts[0] == "NET_RX:": |
| 97 | + perCpu := parts[1:] |
| 98 | + softirqs.NetRx = make([]uint64, len(perCpu)) |
| 99 | + for i, count := range perCpu { |
| 100 | + if softirqs.NetRx[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 101 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (NET_RX%d): %w", count, i, err) |
| 102 | + } |
| 103 | + } |
| 104 | + case parts[0] == "BLOCK:": |
| 105 | + perCpu := parts[1:] |
| 106 | + softirqs.Block = make([]uint64, len(perCpu)) |
| 107 | + for i, count := range perCpu { |
| 108 | + if softirqs.Block[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 109 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (BLOCK%d): %w", count, i, err) |
| 110 | + } |
| 111 | + } |
| 112 | + case parts[0] == "IRQ_POLL:": |
| 113 | + perCpu := parts[1:] |
| 114 | + softirqs.IRQPoll = make([]uint64, len(perCpu)) |
| 115 | + for i, count := range perCpu { |
| 116 | + if softirqs.IRQPoll[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 117 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (IRQ_POLL%d): %w", count, i, err) |
| 118 | + } |
| 119 | + } |
| 120 | + case parts[0] == "TASKLET:": |
| 121 | + perCpu := parts[1:] |
| 122 | + softirqs.Tasklet = make([]uint64, len(perCpu)) |
| 123 | + for i, count := range perCpu { |
| 124 | + if softirqs.Tasklet[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 125 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (TASKLET%d): %w", count, i, err) |
| 126 | + } |
| 127 | + } |
| 128 | + case parts[0] == "SCHED:": |
| 129 | + perCpu := parts[1:] |
| 130 | + softirqs.Sched = make([]uint64, len(perCpu)) |
| 131 | + for i, count := range perCpu { |
| 132 | + if softirqs.Sched[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 133 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (SCHED%d): %w", count, i, err) |
| 134 | + } |
| 135 | + } |
| 136 | + case parts[0] == "HRTIMER:": |
| 137 | + perCpu := parts[1:] |
| 138 | + softirqs.HRTimer = make([]uint64, len(perCpu)) |
| 139 | + for i, count := range perCpu { |
| 140 | + if softirqs.HRTimer[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 141 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (HRTIMER%d): %w", count, i, err) |
| 142 | + } |
| 143 | + } |
| 144 | + case parts[0] == "RCU:": |
| 145 | + perCpu := parts[1:] |
| 146 | + softirqs.RCU = make([]uint64, len(perCpu)) |
| 147 | + for i, count := range perCpu { |
| 148 | + if softirqs.RCU[i], err = strconv.ParseUint(count, 10, 64); err != nil { |
| 149 | + return Softirqs{}, fmt.Errorf("couldn't parse %q (RCU%d): %w", count, i, err) |
| 150 | + } |
| 151 | + } |
| 152 | + } |
| 153 | + } |
| 154 | + |
| 155 | + if err := scanner.Err(); err != nil { |
| 156 | + return Softirqs{}, fmt.Errorf("couldn't parse softirqs: %w", err) |
| 157 | + } |
| 158 | + |
| 159 | + return softirqs, scanner.Err() |
| 160 | +} |
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