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Switch CPU from field to tag in interrupts input plugin (#4999) (#5024)

This commit is contained in:
Wojciech Kudla 2018-11-30 22:42:55 +00:00 committed by Daniel Nelson
parent 1d6db08dc8
commit 9a637eda05
3 changed files with 185 additions and 185 deletions
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27
plugins/inputs/interrupts/README.md
View File

@ -5,6 +5,9 @@ The interrupts plugin gathers metrics about IRQs from `/proc/interrupts` and `/p
### Configuration
```
[[inputs.interrupts]]
# To report cpus as tags instead of fields use cpu_as_tags
# cpu_as_tags = false
#
## To filter which IRQs to collect, make use of tagpass / tagdrop, i.e.
# [inputs.interrupts.tagdrop]
# irq = [ "NET_RX", "TASKLET" ]
@ -16,20 +19,32 @@ There are two measurements reported by this plugin.
- `soft_interrupts` gathers metrics from the `/proc/softirqs` file
### Fields
- CPUx: the amount of interrupts for the IRQ handled by that CPU
- total: total amount of interrupts for all CPUs
For cpu_as_tags=false (default):
- CPUx: the amount of interrupts for the IRQ handled by the CPU
- Total: sum of interrupts for the IRS for all CPUs
For cpu_as_tags=true ():
- Count: the amount of interrupts for the IRQ handled by CPU described in CPU tag
### Tags
- irq: the IRQ
- type: the type of interrupt
- device: the name of the device that is located at that IRQ
- cpu: the CPU (when cpus_as_tags=true)
### Example Output
```
./telegraf --config ~/interrupts_config.conf --test
For cpus_as_tags=false (default):
* Plugin: inputs.interrupts, Collection 1
> interrupts,irq=0,type=IO-APIC,device=2-edge\ timer,host=hostname CPU0=23i,total=23i 1489346531000000000
> interrupts,irq=1,host=hostname,type=IO-APIC,device=1-edge\ i8042 CPU0=9i,total=9i 1489346531000000000
> interrupts,irq=30,type=PCI-MSI,device=65537-edge\ virtio1-input.0,host=hostname CPU0=1i,total=1i 1489346531000000000
> soft_interrupts,irq=NET_RX,host=hostname CPU0=280879i,total=280879i 1489346531000000000
> interrupts,irq=0,type=IO-APIC,device=2-edge\ timer,host=hostname,cpu=cpu0 count=23i 1489346531000000000
> interrupts,irq=1,host=hostname,type=IO-APIC,device=1-edge\ i8042,cpu=cpu0 count=9i 1489346531000000000
> interrupts,irq=30,type=PCI-MSI,device=65537-edge\ virtio1-input.0,host=hostname,cpu=cpu1 count=1i 1489346531000000000
> soft_interrupts,irq=NET_RX,host=hostname,cpu=cpu0 count=280879i 1489346531000000000
For cpus_as_tags=true:
> interrupts,cpu=cpu6,host=hostname,irq=PIW,type=Posted-interrupt\ wakeup\ event count=0i 1543539773000000000
> interrupts,cpu=cpu7,host=hostname,irq=PIW,type=Posted-interrupt\ wakeup\ event count=0i 1543539773000000000
> soft_interrupts,cpu=cpu0,host=hostname,irq=HI count=246441i 1543539773000000000
> soft_interrupts,cpu=cpu1,host=hostname,irq=HI count=159154i 1543539773000000000
```

29
plugins/inputs/interrupts/interrupts.go
View File

@ -12,7 +12,9 @@ import (
"github.com/influxdata/telegraf/plugins/inputs"
)
type Interrupts struct{}
type Interrupts struct {
CpuAsTags bool
}
type IRQ struct {
ID string
@ -27,6 +29,9 @@ func NewIRQ(id string) *IRQ {
}
const sampleConfig = `
## To report cpus as tags instead of fields use cpu_as_tags
# cpu_as_tags = false
#
## To filter which IRQs to collect, make use of tagpass / tagdrop, i.e.
# [inputs.interrupts.tagdrop]
# irq = [ "NET_RX", "TASKLET" ]
@ -92,7 +97,7 @@ func gatherTagsFields(irq IRQ) (map[string]string, map[string]interface{}) {
tags := map[string]string{"irq": irq.ID, "type": irq.Type, "device": irq.Device}
fields := map[string]interface{}{"total": irq.Total}
for i := 0; i < len(irq.Cpus); i++ {
cpu := fmt.Sprintf("CPU%d", i)
cpu := fmt.Sprintf("cpu%d", i)
fields[cpu] = irq.Cpus[i]
}
return tags, fields
@ -111,12 +116,26 @@ func (s *Interrupts) Gather(acc telegraf.Accumulator) error {
acc.AddError(fmt.Errorf("Parsing %s: %s", file, err))
continue
}
for _, irq := range irqs {
tags, fields := gatherTagsFields(irq)
reportMetrics(measurement, irqs, acc, s.CpuAsTags)
}
return nil
}
func reportMetrics(measurement string, irqs []IRQ, acc telegraf.Accumulator, cpusAsTags bool) {
for _, irq := range irqs {
tags, fields := gatherTagsFields(irq)
if cpusAsTags {
for cpu, count := range irq.Cpus {
cpuTags := map[string]string{"cpu": fmt.Sprintf("cpu%d", cpu)}
for k, v := range tags {
cpuTags[k] = v
}
acc.AddFields(measurement, map[string]interface{}{"count": count}, cpuTags)
}
} else {
acc.AddFields(measurement, fields, tags)
}
}
return nil
}
func init() {

314
plugins/inputs/interrupts/interrupts_test.go
View File

@ -2,189 +2,155 @@ package interrupts
import (
"bytes"
"fmt"
"testing"
"github.com/stretchr/testify/assert"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/require"
)
func TestParseInterrupts(t *testing.T) {
interruptStr := ` CPU0 CPU1
0: 134 0 IO-APIC-edge timer
1: 7 3 IO-APIC-edge i8042
NMI: 0 0 Non-maskable interrupts
LOC: 2338608687 2334309625 Local timer interrupts
MIS: 0
NET_RX: 867028 225
TASKLET: 205 0`
f := bytes.NewBufferString(interruptStr)
parsed := []IRQ{
{
ID: "0", Type: "IO-APIC-edge", Device: "timer",
Cpus: []int64{int64(134), int64(0)}, Total: int64(134),
},
{
ID: "1", Type: "IO-APIC-edge", Device: "i8042",
Cpus: []int64{int64(7), int64(3)}, Total: int64(10),
},
{
ID: "NMI", Type: "Non-maskable interrupts",
Cpus: []int64{int64(0), int64(0)}, Total: int64(0),
},
{
ID: "LOC", Type: "Local timer interrupts",
Cpus: []int64{int64(2338608687), int64(2334309625)},
Total: int64(4672918312),
},
{
ID: "MIS", Cpus: []int64{int64(0)}, Total: int64(0),
},
{
ID: "NET_RX", Cpus: []int64{int64(867028), int64(225)},
Total: int64(867253),
},
{
ID: "TASKLET", Cpus: []int64{int64(205), int64(0)},
Total: int64(205),
},
}
got, err := parseInterrupts(f)
require.Equal(t, nil, err)
require.NotEqual(t, 0, len(got))
require.Equal(t, len(got), len(parsed))
for i := 0; i < len(parsed); i++ {
assert.Equal(t, parsed[i], got[i])
for k := 0; k < len(parsed[i].Cpus); k++ {
assert.Equal(t, parsed[i].Cpus[k], got[i].Cpus[k])
}
// =====================================================================================
// Setup and helper functions
// =====================================================================================
func expectCpuAsTags(m *testutil.Accumulator, t *testing.T, measurement string, irq IRQ) {
for idx, value := range irq.Cpus {
m.AssertContainsTaggedFields(t, measurement, map[string]interface{}{"count": value}, map[string]string{"irq": irq.ID, "type": irq.Type, "device": irq.Device, "cpu": fmt.Sprintf("cpu%d", idx)})
}
}
// Tests #4470
func TestParseInterruptsBad(t *testing.T) {
interruptStr := ` CPU0 CPU1 CPU2 CPU3
16: 0 0 0 0 bcm2836-timer 0 Edge arch_timer
17: 127224250 118424219 127224437 117885416 bcm2836-timer 1 Edge arch_timer
21: 0 0 0 0 bcm2836-pmu 9 Edge arm-pmu
23: 1549514 0 0 0 ARMCTRL-level 1 Edge 3f00b880.mailbox
24: 2 0 0 0 ARMCTRL-level 2 Edge VCHIQ doorbell
46: 0 0 0 0 ARMCTRL-level 48 Edge bcm2708_fb dma
48: 0 0 0 0 ARMCTRL-level 50 Edge DMA IRQ
50: 0 0 0 0 ARMCTRL-level 52 Edge DMA IRQ
51: 208 0 0 0 ARMCTRL-level 53 Edge DMA IRQ
54: 883002 0 0 0 ARMCTRL-level 56 Edge DMA IRQ
59: 0 0 0 0 ARMCTRL-level 61 Edge bcm2835-auxirq
62: 521451447 0 0 0 ARMCTRL-level 64 Edge dwc_otg, dwc_otg_pcd, dwc_otg_hcd:usb1
86: 857597 0 0 0 ARMCTRL-level 88 Edge mmc0
87: 4938 0 0 0 ARMCTRL-level 89 Edge uart-pl011
92: 5669 0 0 0 ARMCTRL-level 94 Edge mmc1
FIQ: usb_fiq
IPI0: 0 0 0 0 CPU wakeup interrupts
IPI1: 0 0 0 0 Timer broadcast interrupts
IPI2: 23564958 23464876 23531165 23040826 Rescheduling interrupts
IPI3: 148438 639704 644266 588150 Function call interrupts
IPI4: 0 0 0 0 CPU stop interrupts
IPI5: 4348149 1843985 3819457 1822877 IRQ work interrupts
IPI6: 0 0 0 0 completion interrupts`
f := bytes.NewBufferString(interruptStr)
parsed := []IRQ{
{
ID: "16", Type: "bcm2836-timer", Device: "0 Edge arch_timer",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "17", Type: "bcm2836-timer", Device: "1 Edge arch_timer",
Cpus: []int64{127224250, 118424219, 127224437, 117885416}, Total: 490758322,
},
{
ID: "21", Type: "bcm2836-pmu", Device: "9 Edge arm-pmu",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "23", Type: "ARMCTRL-level", Device: "1 Edge 3f00b880.mailbox",
Cpus: []int64{1549514, 0, 0, 0}, Total: 1549514,
},
{
ID: "24", Type: "ARMCTRL-level", Device: "2 Edge VCHIQ doorbell",
Cpus: []int64{2, 0, 0, 0}, Total: 2,
},
{
ID: "46", Type: "ARMCTRL-level", Device: "48 Edge bcm2708_fb dma",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "48", Type: "ARMCTRL-level", Device: "50 Edge DMA IRQ",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "50", Type: "ARMCTRL-level", Device: "52 Edge DMA IRQ",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "51", Type: "ARMCTRL-level", Device: "53 Edge DMA IRQ",
Cpus: []int64{208, 0, 0, 0}, Total: 208,
},
{
ID: "54", Type: "ARMCTRL-level", Device: "56 Edge DMA IRQ",
Cpus: []int64{883002, 0, 0, 0}, Total: 883002,
},
{
ID: "59", Type: "ARMCTRL-level", Device: "61 Edge bcm2835-auxirq",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "62", Type: "ARMCTRL-level", Device: "64 Edge dwc_otg, dwc_otg_pcd, dwc_otg_hcd:usb1",
Cpus: []int64{521451447, 0, 0, 0}, Total: 521451447,
},
{
ID: "86", Type: "ARMCTRL-level", Device: "88 Edge mmc0",
Cpus: []int64{857597, 0, 0, 0}, Total: 857597,
},
{
ID: "87", Type: "ARMCTRL-level", Device: "89 Edge uart-pl011",
Cpus: []int64{4938, 0, 0, 0}, Total: 4938,
},
{
ID: "92", Type: "ARMCTRL-level", Device: "94 Edge mmc1",
Cpus: []int64{5669, 0, 0, 0}, Total: 5669,
},
{
ID: "IPI0", Type: "CPU wakeup interrupts",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "IPI1", Type: "Timer broadcast interrupts",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "IPI2", Type: "Rescheduling interrupts",
Cpus: []int64{23564958, 23464876, 23531165, 23040826}, Total: 93601825,
},
{
ID: "IPI3", Type: "Function call interrupts",
Cpus: []int64{148438, 639704, 644266, 588150}, Total: 2020558,
},
{
ID: "IPI4", Type: "CPU stop interrupts",
Cpus: []int64{0, 0, 0, 0},
},
{
ID: "IPI5", Type: "IRQ work interrupts",
Cpus: []int64{4348149, 1843985, 3819457, 1822877}, Total: 11834468,
},
{
ID: "IPI6", Type: "completion interrupts",
Cpus: []int64{0, 0, 0, 0},
},
func expectCpuAsFields(m *testutil.Accumulator, t *testing.T, measurement string, irq IRQ) {
fields := map[string]interface{}{}
total := int64(0)
for idx, count := range irq.Cpus {
fields[fmt.Sprintf("cpu%d", idx)] = count
total += count
}
got, err := parseInterrupts(f)
fields["total"] = total
m.AssertContainsTaggedFields(t, measurement, fields, map[string]string{"irq": irq.ID, "type": irq.Type, "device": irq.Device})
}
func setup(t *testing.T, irqString string, cpuAsTags bool) (*testutil.Accumulator, []IRQ) {
f := bytes.NewBufferString(irqString)
irqs, err := parseInterrupts(f)
require.Equal(t, nil, err)
require.NotEqual(t, 0, len(got))
require.Equal(t, len(got), len(parsed))
for i := 0; i < len(parsed); i++ {
assert.Equal(t, parsed[i], got[i])
for k := 0; k < len(parsed[i].Cpus); k++ {
assert.Equal(t, parsed[i].Cpus[k], got[i].Cpus[k])
}
require.NotEqual(t, 0, len(irqs))
acc := new(testutil.Accumulator)
reportMetrics("soft_interrupts", irqs, acc, cpuAsTags)
return acc, irqs
}
// =====================================================================================
// Soft interrupts
// =====================================================================================
const softIrqsString = ` CPU0 CPU1
0: 134 0 IO-APIC-edge timer
1: 7 3 IO-APIC-edge i8042
NMI: 0 0 Non-maskable interrupts
LOC: 2338608687 2334309625 Local timer interrupts
MIS: 0
NET_RX: 867028 225
TASKLET: 205 0`
var softIrqsExpectedArgs = []IRQ{
{ID: "0", Type: "IO-APIC-edge", Device: "timer", Cpus: []int64{134, 0}},
{ID: "1", Type: "IO-APIC-edge", Device: "i8042", Cpus: []int64{7, 3}},
{ID: "NMI", Type: "Non-maskable interrupts", Cpus: []int64{0, 0}},
{ID: "MIS", Cpus: []int64{0}},
{ID: "NET_RX", Cpus: []int64{867028, 225}},
{ID: "TASKLET", Cpus: []int64{205, 0}},
}
func TestCpuAsTagsSoftIrqs(t *testing.T) {
acc, irqs := setup(t, softIrqsString, true)
reportMetrics("soft_interrupts", irqs, acc, true)
for _, irq := range softIrqsExpectedArgs {
expectCpuAsTags(acc, t, "soft_interrupts", irq)
}
}
func TestCpuAsFieldsSoftIrqs(t *testing.T) {
acc, irqs := setup(t, softIrqsString, false)
reportMetrics("soft_interrupts", irqs, acc, false)
for _, irq := range softIrqsExpectedArgs {
expectCpuAsFields(acc, t, "soft_interrupts", irq)
}
}
// =====================================================================================
// HW interrupts, tests #4470
// =====================================================================================
const hwIrqsString = ` CPU0 CPU1 CPU2 CPU3
16: 0 0 0 0 bcm2836-timer 0 Edge arch_timer
17: 127224250 118424219 127224437 117885416 bcm2836-timer 1 Edge arch_timer
21: 0 0 0 0 bcm2836-pmu 9 Edge arm-pmu
23: 1549514 0 0 0 ARMCTRL-level 1 Edge 3f00b880.mailbox
24: 2 0 0 0 ARMCTRL-level 2 Edge VCHIQ doorbell
46: 0 0 0 0 ARMCTRL-level 48 Edge bcm2708_fb dma
48: 0 0 0 0 ARMCTRL-level 50 Edge DMA IRQ
50: 0 0 0 0 ARMCTRL-level 52 Edge DMA IRQ
51: 208 0 0 0 ARMCTRL-level 53 Edge DMA IRQ
54: 883002 0 0 0 ARMCTRL-level 56 Edge DMA IRQ
59: 0 0 0 0 ARMCTRL-level 61 Edge bcm2835-auxirq
62: 521451447 0 0 0 ARMCTRL-level 64 Edge dwc_otg, dwc_otg_pcd, dwc_otg_hcd:usb1
86: 857597 0 0 0 ARMCTRL-level 88 Edge mmc0
87: 4938 0 0 0 ARMCTRL-level 89 Edge uart-pl011
92: 5669 0 0 0 ARMCTRL-level 94 Edge mmc1
FIQ: usb_fiq
IPI0: 0 0 0 0 CPU wakeup interrupts
IPI1: 0 0 0 0 Timer broadcast interrupts
IPI2: 23564958 23464876 23531165 23040826 Rescheduling interrupts
IPI3: 148438 639704 644266 588150 Function call interrupts
IPI4: 0 0 0 0 CPU stop interrupts
IPI5: 4348149 1843985 3819457 1822877 IRQ work interrupts
IPI6: 0 0 0 0 completion interrupts`
var hwIrqsExpectedArgs = []IRQ{
{ID: "16", Type: "bcm2836-timer", Device: "0 Edge arch_timer", Cpus: []int64{0, 0, 0, 0}},
{ID: "17", Type: "bcm2836-timer", Device: "1 Edge arch_timer", Cpus: []int64{127224250, 118424219, 127224437, 117885416}},
{ID: "21", Type: "bcm2836-pmu", Device: "9 Edge arm-pmu", Cpus: []int64{0, 0, 0, 0}},
{ID: "23", Type: "ARMCTRL-level", Device: "1 Edge 3f00b880.mailbox", Cpus: []int64{1549514, 0, 0, 0}},
{ID: "24", Type: "ARMCTRL-level", Device: "2 Edge VCHIQ doorbell", Cpus: []int64{2, 0, 0, 0}},
{ID: "46", Type: "ARMCTRL-level", Device: "48 Edge bcm2708_fb dma", Cpus: []int64{0, 0, 0, 0}},
{ID: "48", Type: "ARMCTRL-level", Device: "50 Edge DMA IRQ", Cpus: []int64{0, 0, 0, 0}},
{ID: "50", Type: "ARMCTRL-level", Device: "52 Edge DMA IRQ", Cpus: []int64{0, 0, 0, 0}},
{ID: "51", Type: "ARMCTRL-level", Device: "53 Edge DMA IRQ", Cpus: []int64{208, 0, 0, 0}},
{ID: "54", Type: "ARMCTRL-level", Device: "56 Edge DMA IRQ", Cpus: []int64{883002, 0, 0, 0}},
{ID: "59", Type: "ARMCTRL-level", Device: "61 Edge bcm2835-auxirq", Cpus: []int64{0, 0, 0, 0}},
{ID: "62", Type: "ARMCTRL-level", Device: "64 Edge dwc_otg, dwc_otg_pcd, dwc_otg_hcd:usb1", Cpus: []int64{521451447, 0, 0, 0}},
{ID: "86", Type: "ARMCTRL-level", Device: "88 Edge mmc0", Cpus: []int64{857597, 0, 0, 0}},
{ID: "87", Type: "ARMCTRL-level", Device: "89 Edge uart-pl011", Cpus: []int64{4938, 0, 0, 0}},
{ID: "92", Type: "ARMCTRL-level", Device: "94 Edge mmc1", Cpus: []int64{5669, 0, 0, 0}},
{ID: "IPI0", Type: "CPU wakeup interrupts", Cpus: []int64{0, 0, 0, 0}},
{ID: "IPI1", Type: "Timer broadcast interrupts", Cpus: []int64{0, 0, 0, 0}},
{ID: "IPI2", Type: "Rescheduling interrupts", Cpus: []int64{23564958, 23464876, 23531165, 23040826}},
{ID: "IPI3", Type: "Function call interrupts", Cpus: []int64{148438, 639704, 644266, 588150}},
{ID: "IPI4", Type: "CPU stop interrupts", Cpus: []int64{0, 0, 0, 0}},
{ID: "IPI5", Type: "IRQ work interrupts", Cpus: []int64{4348149, 1843985, 3819457, 1822877}},
{ID: "IPI6", Type: "completion interrupts", Cpus: []int64{0, 0, 0, 0}},
}
func TestCpuAsTagsHwIrqs(t *testing.T) {
acc, irqs := setup(t, hwIrqsString, true)
reportMetrics("interrupts", irqs, acc, true)
for _, irq := range hwIrqsExpectedArgs {
expectCpuAsTags(acc, t, "interrupts", irq)
}
}
func TestCpuAsFieldsHwIrqs(t *testing.T) {
acc, irqs := setup(t, hwIrqsString, false)
reportMetrics("interrupts", irqs, acc, false)
for _, irq := range hwIrqsExpectedArgs {
expectCpuAsFields(acc, t, "interrupts", irq)
}
}