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report core throttles for each CPU #1479

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report core throttles for each CPU #1479

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@

### Changes

* [CHANGE] Report cpu_core_throttles for all CPUs. Add label "cpu". #1479
* [CHANGE] Add `--collector.netdev.device-whitelist`. #1279
* [CHANGE] Refactor mdadm collector #1403
* [CHANGE] Add `mountaddr` label to NFS metrics. #1417
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46 changes: 17 additions & 29 deletions collector/cpu_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import (
"fmt"
"path/filepath"
"strconv"
"strings"

"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
Expand Down Expand Up @@ -53,8 +54,8 @@ func NewCPUCollector() (Collector, error) {
),
cpuCoreThrottle: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "core_throttles_total"),
"Number of times this cpu core has been throttled.",
[]string{"package", "core"}, nil,
"Number of times this cpu has been throttled.",
[]string{"package", "core", "cpu"}, nil,
),
cpuPackageThrottle: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "package_throttles_total"),
Expand Down Expand Up @@ -83,7 +84,6 @@ func (c *cpuCollector) updateThermalThrottle(ch chan<- prometheus.Metric) error
}

packageThrottles := make(map[uint64]uint64)
packageCoreThrottles := make(map[uint64]map[uint64]uint64)

// cpu loop
for _, cpu := range cpus {
Expand Down Expand Up @@ -111,45 +111,33 @@ func (c *cpuCollector) updateThermalThrottle(ch chan<- prometheus.Metric) error
// are cpu+kernel combinations that only present core throttles
// but no package throttles.
// Seen e.g. on an Intel Xeon E5472 system with RHEL 6.9 kernel.
if _, present := packageCoreThrottles[physicalPackageID]; !present {
packageCoreThrottles[physicalPackageID] = make(map[uint64]uint64)
}
if _, present := packageCoreThrottles[physicalPackageID][coreID]; !present {
// Read thermal_throttle/core_throttle_count only once
if coreThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "core_throttle_count")); err == nil {
packageCoreThrottles[physicalPackageID][coreID] = coreThrottleCount
} else {
log.Debugf("CPU %v is missing core_throttle_count", cpu)
}
if coreThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "core_throttle_count")); err == nil {
ch <- prometheus.MustNewConstMetric(c.cpuCoreThrottle,
prometheus.CounterValue,
float64(coreThrottleCount),
strconv.FormatUint(physicalPackageID, 10),
strconv.FormatUint(coreID, 10),
strings.TrimPrefix(filepath.Base(cpu), "cpu"))
} else {
log.Debugf("CPU %v is missing core_throttle_count", cpu)
}

// metric node_cpu_package_throttles_total
// All CPUs in the same package have the same value for package_throttles, so we only need one metric per package
if _, present := packageThrottles[physicalPackageID]; !present {
// Read thermal_throttle/package_throttle_count only once
if packageThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "package_throttle_count")); err == nil {
packageThrottles[physicalPackageID] = packageThrottleCount
ch <- prometheus.MustNewConstMetric(c.cpuPackageThrottle,
prometheus.CounterValue,
float64(packageThrottleCount),
strconv.FormatUint(physicalPackageID, 10))
} else {
log.Debugf("CPU %v is missing package_throttle_count", cpu)
}
}
}

for physicalPackageID, packageThrottleCount := range packageThrottles {
ch <- prometheus.MustNewConstMetric(c.cpuPackageThrottle,
prometheus.CounterValue,
float64(packageThrottleCount),
strconv.FormatUint(physicalPackageID, 10))
}

for physicalPackageID, coreMap := range packageCoreThrottles {
for coreID, coreThrottleCount := range coreMap {
ch <- prometheus.MustNewConstMetric(c.cpuCoreThrottle,
prometheus.CounterValue,
float64(coreThrottleCount),
strconv.FormatUint(physicalPackageID, 10),
strconv.FormatUint(coreID, 10))
}
}
return nil
}

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10 changes: 5 additions & 5 deletions collector/fixtures/e2e-64k-page-output.txt
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Expand Up @@ -184,12 +184,12 @@ node_cooling_device_cur_state{name="0",type="Processor"} 0
# HELP node_cooling_device_max_state Maximum throttle state of the cooling device
# TYPE node_cooling_device_max_state gauge
node_cooling_device_max_state{name="0",type="Processor"} 3
# HELP node_cpu_core_throttles_total Number of times this cpu core has been throttled.
# HELP node_cpu_core_throttles_total Number of times this cpu has been throttled.
# TYPE node_cpu_core_throttles_total counter
node_cpu_core_throttles_total{core="0",package="0"} 5
node_cpu_core_throttles_total{core="0",package="1"} 0
node_cpu_core_throttles_total{core="1",package="0"} 0
node_cpu_core_throttles_total{core="1",package="1"} 9
node_cpu_core_throttles_total{core="0",cpu="0",package="0"} 5
node_cpu_core_throttles_total{core="0",cpu="2",package="1"} 0
node_cpu_core_throttles_total{core="1",cpu="1",package="0"} 0
node_cpu_core_throttles_total{core="1",cpu="3",package="1"} 9
# HELP node_cpu_guest_seconds_total Seconds the cpus spent in guests (VMs) for each mode.
# TYPE node_cpu_guest_seconds_total counter
node_cpu_guest_seconds_total{cpu="0",mode="nice"} 0.01
Expand Down
10 changes: 5 additions & 5 deletions collector/fixtures/e2e-output.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -184,12 +184,12 @@ node_cooling_device_cur_state{name="0",type="Processor"} 0
# HELP node_cooling_device_max_state Maximum throttle state of the cooling device
# TYPE node_cooling_device_max_state gauge
node_cooling_device_max_state{name="0",type="Processor"} 3
# HELP node_cpu_core_throttles_total Number of times this cpu core has been throttled.
# HELP node_cpu_core_throttles_total Number of times this cpu has been throttled.
# TYPE node_cpu_core_throttles_total counter
node_cpu_core_throttles_total{core="0",package="0"} 5
node_cpu_core_throttles_total{core="0",package="1"} 0
node_cpu_core_throttles_total{core="1",package="0"} 0
node_cpu_core_throttles_total{core="1",package="1"} 9
node_cpu_core_throttles_total{core="0",cpu="0",package="0"} 5
node_cpu_core_throttles_total{core="0",cpu="2",package="1"} 0
node_cpu_core_throttles_total{core="1",cpu="1",package="0"} 0
node_cpu_core_throttles_total{core="1",cpu="3",package="1"} 9
# HELP node_cpu_guest_seconds_total Seconds the cpus spent in guests (VMs) for each mode.
# TYPE node_cpu_guest_seconds_total counter
node_cpu_guest_seconds_total{cpu="0",mode="nice"} 0.01
Expand Down