metricbeat: add cpu.total.pct && cpu.total.norm.pct

Closes #4898

CHANGELOG.asciidoc

@@ -59,6 +59,7 @@ https://github.com/elastic/beats/compare/v6.0.0-beta1...master[Check the HEAD di
 - Support `npipe` protocol (Windows) in Docker module. {pull}4751[4751]
 - Added missing mongodb configuration file to the `modules.d` folder. {pull}4870[4870]
 - Fix wrong MySQL CRUD queries timelion visualization {pull}4857[4857]
+- Add new metrics to CPU metricsset {pull}4969[4969]
 
 *Packetbeat*
 

metricbeat/docs/fields.asciidoc

@@ -8543,6 +8543,16 @@ format: percent
 The percentage of CPU time spent in involuntary wait by the virtual CPU while the hypervisor was servicing another processor. Available only on Unix.
 
 
+[float]
+=== `system.cpu.total.pct`
+
+type: scaled_float
+
+format: percent
+
+The percentage of CPU time spent in non-idle state.
+
+
 [float]
 === `system.cpu.user.norm.pct`
 
@@ -8623,6 +8633,16 @@ format: percent
 The percentage of CPU time spent in involuntary wait by the virtual CPU while the hypervisor was servicing another processor. Available only on Unix.
 
 
+[float]
+=== `system.cpu.total.norm.pct`
+
+type: scaled_float
+
+format: percent
+
+The percentage of CPU time spent in non-idle state.
+
+
 [float]
 === `system.cpu.user.ticks`
 

metricbeat/module/system/cpu/_meta/fields.yml

@@ -64,6 +64,12 @@
         was servicing another processor.
         Available only on Unix.
 
+    - name: total.pct
+      type: scaled_float
+      format: percent
+      description: >
+        The percentage of CPU time spent in non-idle state.
+
     # Normalized Percentages
     - name: user.norm.pct
       type: scaled_float
@@ -115,6 +121,13 @@
         was servicing another processor.
         Available only on Unix.
 
+    - name: total.norm.pct
+      type: scaled_float
+      format: percent
+      description: >
+        The percentage of CPU time spent in non-idle state.
+
+
     # Ticks
     - name: user.ticks
       type: long

metricbeat/module/system/cpu/cpu.go

@@ -65,6 +65,7 @@ func (m *MetricSet) Fetch() (common.MapStr, error) {
 			event.Put("nice.pct", pct.Nice)
 			event.Put("softirq.pct", pct.SoftIRQ)
 			event.Put("steal.pct", pct.Steal)
+			event.Put("total.pct", pct.Total)
 		case normalizedPercentages:
 			normalizedPct := sample.NormalizedPercentages()
 			event.Put("user.norm.pct", normalizedPct.User)
@@ -75,6 +76,7 @@ func (m *MetricSet) Fetch() (common.MapStr, error) {
 			event.Put("nice.norm.pct", normalizedPct.Nice)
 			event.Put("softirq.norm.pct", normalizedPct.SoftIRQ)
 			event.Put("steal.norm.pct", normalizedPct.Steal)
+			event.Put("total.norm.pct", normalizedPct.Total)
 		case ticks:
 			ticks := sample.Ticks()
 			event.Put("user.ticks", ticks.User)

metricbeat/module/system/util.go

@@ -47,6 +47,7 @@ type CPUPercentages struct {
 	Nice    float64
 	SoftIRQ float64
 	Steal   float64
+	Total   float64
 }
 
 type CPUTicks struct {
@@ -98,6 +99,10 @@ func cpuPercentages(s0, s1 *sigar.Cpu, numCPU int) CPUPercentages {
 		return Round(pct * float64(numCPU))
 	}
 
+	calculateTotalPct := func() float64 {
+		return Round(float64(numCPU) - calculatePct(s0.Idle, s1.Idle))
+	}
+
 	return CPUPercentages{
 		User:    calculatePct(s0.User, s1.User),
 		System:  calculatePct(s0.Sys, s1.Sys),
@@ -107,6 +112,7 @@ func cpuPercentages(s0, s1 *sigar.Cpu, numCPU int) CPUPercentages {
 		Nice:    calculatePct(s0.Nice, s1.Nice),
 		SoftIRQ: calculatePct(s0.SoftIrq, s1.SoftIrq),
 		Steal:   calculatePct(s0.Stolen, s1.Stolen),
+		Total:   calculateTotalPct(),
 	}
 }
 

metricbeat/module/system/util_test.go

@@ -52,6 +52,8 @@ func TestCPUCoresMonitorSample(t *testing.T) {
 		assert.True(t, normPct.System <= 100)
 		assert.True(t, normPct.Idle > 0)
 		assert.True(t, normPct.Idle <= 100)
+		assert.True(t, normPct.Total > 0)
+		assert.True(t, normPct.Total <= 100)
 
 		ticks := s.Ticks()
 		assert.True(t, ticks.User > 0)
@@ -110,10 +112,14 @@ func TestCPUMetricsPercentages(t *testing.T) {
 	pct := sample.NormalizedPercentages()
 	assert.EqualValues(t, .3, pct.User)
 	assert.EqualValues(t, .7, pct.System)
+	assert.EqualValues(t, .0, pct.Idle)
+	assert.EqualValues(t, 1., pct.Total)
 
 	pct = sample.Percentages()
 	assert.EqualValues(t, .3*float64(NumCPU), pct.User)
 	assert.EqualValues(t, .7*float64(NumCPU), pct.System)
+	assert.EqualValues(t, .0*float64(NumCPU), pct.Idle)
+	assert.EqualValues(t, 1.*float64(NumCPU), pct.Total)
 }
 
 func TestRound(t *testing.T) {