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main.go
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main.go
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package main
import (
"flag"
"log"
"net/http"
"strconv"
"sync"
"github.com/mindprince/gonvml"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
const (
namespace = "nvidia_gpu"
)
var (
addr = flag.String("web.listen-address", ":9445", "Address to listen on for web interface and telemetry.")
labels = []string{"minor_number", "uuid", "name"}
)
type Collector struct {
sync.Mutex
numDevices prometheus.Gauge
usedMemory *prometheus.GaugeVec
totalMemory *prometheus.GaugeVec
dutyCycle *prometheus.GaugeVec
powerUsage *prometheus.GaugeVec
temperature *prometheus.GaugeVec
fanSpeed *prometheus.GaugeVec
}
func NewCollector() *Collector {
return &Collector{
numDevices: prometheus.NewGauge(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "num_devices",
Help: "Number of GPU devices",
},
),
usedMemory: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "memory_used_bytes",
Help: "Memory used by the GPU device in bytes",
},
labels,
),
totalMemory: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "memory_total_bytes",
Help: "Total memory of the GPU device in bytes",
},
labels,
),
dutyCycle: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "duty_cycle",
Help: "Percent of time over the past sample period during which one or more kernels were executing on the GPU device",
},
labels,
),
powerUsage: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "power_usage_milliwatts",
Help: "Power usage of the GPU device in milliwatts",
},
labels,
),
temperature: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "temperature_celsius",
Help: "Temperature of the GPU device in celsius",
},
labels,
),
fanSpeed: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: "fanspeed_percent",
Help: "Fanspeed of the GPU device as a percent of its maximum",
},
labels,
),
}
}
func (c *Collector) Describe(ch chan<- *prometheus.Desc) {
ch <- c.numDevices.Desc()
c.usedMemory.Describe(ch)
c.totalMemory.Describe(ch)
c.dutyCycle.Describe(ch)
c.powerUsage.Describe(ch)
c.temperature.Describe(ch)
c.fanSpeed.Describe(ch)
}
func (c *Collector) Collect(ch chan<- prometheus.Metric) {
// Only one Collect call in progress at a time.
c.Lock()
defer c.Unlock()
c.usedMemory.Reset()
c.totalMemory.Reset()
c.dutyCycle.Reset()
c.powerUsage.Reset()
c.temperature.Reset()
c.fanSpeed.Reset()
numDevices, err := gonvml.DeviceCount()
if err != nil {
log.Printf("DeviceCount() error: %v", err)
return
} else {
c.numDevices.Set(float64(numDevices))
ch <- c.numDevices
}
for i := 0; i < int(numDevices); i++ {
dev, err := gonvml.DeviceHandleByIndex(uint(i))
if err != nil {
log.Printf("DeviceHandleByIndex(%d) error: %v", i, err)
continue
}
minorNumber, err := dev.MinorNumber()
if err != nil {
log.Printf("MinorNumber() error: %v", err)
continue
}
minor := strconv.Itoa(int(minorNumber))
uuid, err := dev.UUID()
if err != nil {
log.Printf("UUID() error: %v", err)
continue
}
name, err := dev.Name()
if err != nil {
log.Printf("Name() error: %v", err)
continue
}
totalMemory, usedMemory, err := dev.MemoryInfo()
if err != nil {
log.Printf("MemoryInfo() error: %v", err)
} else {
c.usedMemory.WithLabelValues(minor, uuid, name).Set(float64(usedMemory))
c.totalMemory.WithLabelValues(minor, uuid, name).Set(float64(totalMemory))
}
dutyCycle, _, err := dev.UtilizationRates()
if err != nil {
log.Printf("UtilizationRates() error: %v", err)
} else {
c.dutyCycle.WithLabelValues(minor, uuid, name).Set(float64(dutyCycle))
}
powerUsage, err := dev.PowerUsage()
if err != nil {
log.Printf("PowerUsage() error: %v", err)
} else {
c.powerUsage.WithLabelValues(minor, uuid, name).Set(float64(powerUsage))
}
temperature, err := dev.Temperature()
if err != nil {
log.Printf("Temperature() error: %v", err)
} else {
c.temperature.WithLabelValues(minor, uuid, name).Set(float64(temperature))
}
fanSpeed, err := dev.FanSpeed()
if err != nil {
log.Printf("FanSpeed() error: %v", err)
} else {
c.fanSpeed.WithLabelValues(minor, uuid, name).Set(float64(fanSpeed))
}
}
c.usedMemory.Collect(ch)
c.totalMemory.Collect(ch)
c.dutyCycle.Collect(ch)
c.powerUsage.Collect(ch)
c.temperature.Collect(ch)
c.fanSpeed.Collect(ch)
}
func main() {
flag.Parse()
if err := gonvml.Initialize(); err != nil {
log.Fatalf("Couldn't initialize gonvml: %v. Make sure NVML is in the shared library search path.", err)
}
defer gonvml.Shutdown()
if driverVersion, err := gonvml.SystemDriverVersion(); err != nil {
log.Printf("SystemDriverVersion() error: %v", err)
} else {
log.Printf("SystemDriverVersion(): %v", driverVersion)
}
prometheus.MustRegister(NewCollector())
// Serve on all paths under addr
log.Fatalf("ListenAndServe error: %v", http.ListenAndServe(*addr, promhttp.Handler()))
}