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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // Copyright 2022 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" | ||
| "bytes" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/prometheus/procfs/internal/util" | ||
| ) | ||
|
|
||
| // Interrupt represents a single interrupt line. | ||
| type Interrupt struct { | ||
| // Info is the type of interrupt. | ||
| Info string | ||
| // Devices is the name of the device that is located at that IRQ | ||
| Devices string | ||
| // Values is the number of interrupts per CPU. | ||
| Values []string | ||
| } | ||
|
|
||
| // Interrupts models the content of /proc/interrupts. Key is the IRQ number. | ||
| // - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s2-proc-interrupts | ||
| // - https://raspberrypi.stackexchange.com/questions/105802/explanation-of-proc-interrupts-output | ||
| type Interrupts map[string]Interrupt | ||
|
|
||
| // Interrupts creates a new instance from a given Proc instance. | ||
| func (p Proc) Interrupts() (Interrupts, error) { | ||
| data, err := util.ReadFileNoStat(p.path("interrupts")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return parseInterrupts(bytes.NewReader(data)) | ||
| } | ||
|
|
||
| func parseInterrupts(r io.Reader) (Interrupts, error) { | ||
| var ( | ||
| interrupts = Interrupts{} | ||
| scanner = bufio.NewScanner(r) | ||
| ) | ||
|
|
||
| if !scanner.Scan() { | ||
| return nil, errors.New("interrupts empty") | ||
| } | ||
| cpuNum := len(strings.Fields(scanner.Text())) // one header per cpu | ||
|
|
||
| for scanner.Scan() { | ||
| parts := strings.Fields(scanner.Text()) | ||
| if len(parts) == 0 { // skip empty lines | ||
| continue | ||
| } | ||
| if len(parts) < 2 { | ||
| return nil, fmt.Errorf("not enough fields in interrupts (expected at least 2 fields but got %d): %s", len(parts), parts) | ||
| } | ||
| intName := parts[0][:len(parts[0])-1] // remove trailing : | ||
|
|
||
| if len(parts) == 2 { | ||
| interrupts[intName] = Interrupt{ | ||
| Info: "", | ||
| Devices: "", | ||
| Values: []string{ | ||
| parts[1], | ||
| }, | ||
| } | ||
| continue | ||
| } | ||
|
|
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| intr := Interrupt{ | ||
| Values: parts[1 : cpuNum+1], | ||
| } | ||
|
|
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| if _, err := strconv.Atoi(intName); err == nil { // numeral interrupt | ||
| intr.Info = parts[cpuNum+1] | ||
| intr.Devices = strings.Join(parts[cpuNum+2:], " ") | ||
| } else { | ||
| intr.Info = strings.Join(parts[cpuNum+1:], " ") | ||
| } | ||
| interrupts[intName] = intr | ||
| } | ||
|
|
||
| return interrupts, scanner.Err() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,94 @@ | ||
| // Copyright 2022 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 ( | ||
| "reflect" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestProcInterrupts(t *testing.T) { | ||
| p, err := getProcFixtures(t).Proc(26231) | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
|
|
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| interrupts, err := p.Interrupts() | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
|
|
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| if want, have := 47, len(interrupts); want != have { | ||
| t.Errorf("want length %d, have %d", want, have) | ||
| } | ||
|
|
||
| for _, test := range []struct { | ||
| name string | ||
| irq string | ||
| want Interrupt | ||
| }{ | ||
| { | ||
| name: "first line", | ||
| irq: "0", | ||
| want: Interrupt{ | ||
| Info: "IO-APIC", | ||
| Devices: "2-edge timer", | ||
| Values: []string{"49", "0", "0", "0"}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "last line", | ||
| irq: "PIW", | ||
| want: Interrupt{ | ||
| Info: "Posted-interrupt wakeup event", | ||
| Devices: "", | ||
| Values: []string{"0", "0", "0", "0"}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "empty devices", | ||
| irq: "LOC", | ||
| want: Interrupt{ | ||
| Info: "Local timer interrupts", | ||
| Devices: "", | ||
| Values: []string{"10196", "7429", "8542", "8229"}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "single value", | ||
| irq: "ERR", | ||
| want: Interrupt{ | ||
| Info: "", | ||
| Devices: "", | ||
| Values: []string{"0"}, | ||
| }, | ||
| }, | ||
| } { | ||
| t.Run(test.name, func(t *testing.T) { | ||
| if value, ok := interrupts[test.irq]; ok { | ||
| if value.Info != test.want.Info { | ||
| t.Errorf("info: want %s, have %s", test.want.Info, value.Info) | ||
| } | ||
| if value.Devices != test.want.Devices { | ||
| t.Errorf("devices: want %s, have %s", test.want.Devices, value.Devices) | ||
| } | ||
| if !reflect.DeepEqual(value.Values, test.want.Values) { | ||
| t.Errorf("values: want %v, have %v", test.want.Values, value.Values) | ||
| } | ||
| } else { | ||
| t.Errorf("IRQ %s not found", test.irq) | ||
| } | ||
| }) | ||
| } | ||
| } |
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