Update nvidia-smi input to use xml (#6639)
This commit is contained in:
Greg
Daniel Nelson
parent
55b78a5f66
commit
2cf5116d14
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@ -1,7 +1,7 @@
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package nvidia_smi
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import (
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"bufio"
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"encoding/xml"
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"fmt"
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"os"
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"os/exec"
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@ -14,41 +14,12 @@ import (
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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var (
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measurement = "nvidia_smi"
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metrics = "fan.speed,memory.total,memory.used,memory.free,pstate,temperature.gpu,name,uuid,compute_mode,utilization.gpu,utilization.memory,index,power.draw,pcie.link.gen.current,pcie.link.width.current,encoder.stats.sessionCount,encoder.stats.averageFps,encoder.stats.averageLatency,clocks.current.graphics,clocks.current.sm,clocks.current.memory,clocks.current.video"
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metricNames = [][]string{
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{"fan_speed", "integer"},
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{"memory_total", "integer"},
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{"memory_used", "integer"},
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{"memory_free", "integer"},
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{"pstate", "tag"},
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{"temperature_gpu", "integer"},
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{"name", "tag"},
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{"uuid", "tag"},
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{"compute_mode", "tag"},
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{"utilization_gpu", "integer"},
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{"utilization_memory", "integer"},
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{"index", "tag"},
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{"power_draw", "float"},
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{"pcie_link_gen_current", "integer"},
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{"pcie_link_width_current", "integer"},
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{"encoder_stats_session_count", "integer"},
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{"encoder_stats_average_fps", "integer"},
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{"encoder_stats_average_latency", "integer"},
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{"clocks_current_graphics", "integer"},
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{"clocks_current_sm", "integer"},
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{"clocks_current_memory", "integer"},
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{"clocks_current_video", "integer"},
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}
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)
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const measurement = "nvidia_smi"
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// NvidiaSMI holds the methods for this plugin
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type NvidiaSMI struct {
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BinPath string
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Timeout internal.Duration
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metrics string
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}
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// Description returns the description of the NvidiaSMI plugin
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@ -69,7 +40,6 @@ func (smi *NvidiaSMI) SampleConfig() string {
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// Gather implements the telegraf interface
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func (smi *NvidiaSMI) Gather(acc telegraf.Accumulator) error {
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if _, err := os.Stat(smi.BinPath); os.IsNotExist(err) {
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return fmt.Errorf("nvidia-smi binary not at path %s, cannot gather GPU data", smi.BinPath)
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}
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@ -92,93 +62,178 @@ func init() {
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return &NvidiaSMI{
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BinPath: "/usr/bin/nvidia-smi",
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Timeout: internal.Duration{Duration: 5 * time.Second},
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metrics: metrics,
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}
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})
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}
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func (smi *NvidiaSMI) pollSMI() (string, error) {
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func (smi *NvidiaSMI) pollSMI() ([]byte, error) {
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// Construct and execute metrics query
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opts := []string{"--format=noheader,nounits,csv", fmt.Sprintf("--query-gpu=%s", smi.metrics)}
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ret, err := internal.CombinedOutputTimeout(exec.Command(smi.BinPath, opts...), smi.Timeout.Duration)
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ret, err := internal.CombinedOutputTimeout(exec.Command(smi.BinPath, "-q", "-x"), smi.Timeout.Duration)
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if err != nil {
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return "", err
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return nil, err
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}
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return string(ret), nil
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return ret, nil
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}
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func gatherNvidiaSMI(ret string, acc telegraf.Accumulator) error {
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// First split the lines up and handle each one
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scanner := bufio.NewScanner(strings.NewReader(ret))
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for scanner.Scan() {
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tags, fields, err := parseLine(scanner.Text())
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func gatherNvidiaSMI(ret []byte, acc telegraf.Accumulator) error {
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smi := &SMI{}
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err := xml.Unmarshal(ret, smi)
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if err != nil {
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return err
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}
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acc.AddFields(measurement, fields, tags)
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}
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if err := scanner.Err(); err != nil {
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return fmt.Errorf("Error scanning text %s", ret)
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metrics := smi.genTagsFields()
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for _, metric := range metrics {
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acc.AddFields(measurement, metric.fields, metric.tags)
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}
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return nil
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}
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func parseLine(line string) (map[string]string, map[string]interface{}, error) {
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tags := make(map[string]string, 0)
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fields := make(map[string]interface{}, 0)
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// Next split up the comma delimited metrics
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met := strings.Split(line, ",")
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// Make sure there are as many metrics in the line as there were queried.
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if len(met) == len(metricNames) {
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for i, m := range metricNames {
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col := strings.TrimSpace(met[i])
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// Handle the tags
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if m[1] == "tag" {
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tags[m[0]] = col
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continue
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type metric struct {
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tags map[string]string
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fields map[string]interface{}
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}
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// In some cases we may not be able to get data.
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// One such case is when the memory is overclocked.
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// nvidia-smi reads the max supported memory clock from the stock value.
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// If the current memory clock is greater than the max detected memory clock then we receive [Unknown Error] as a value.
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func (s *SMI) genTagsFields() []metric {
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metrics := []metric{}
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for i, gpu := range s.GPU {
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tags := map[string]string{
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"index": strconv.Itoa(i),
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}
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fields := map[string]interface{}{}
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// For example, the stock max memory clock speed on a 2080 Ti is 7000 MHz which nvidia-smi detects.
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// The user has overclocked their memory using an offset of +1000 so under load the memory clock reaches 8000 MHz.
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// Now when nvidia-smi tries to read the current memory clock it fails and spits back [Unknown Error] as the value.
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// This value will break the parsing logic below unless it is accounted for here.
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if strings.Contains(col, "[Not Supported]") || strings.Contains(col, "[Unknown Error]") {
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continue
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setTagIfUsed(tags, "pstate", gpu.PState)
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setTagIfUsed(tags, "name", gpu.ProdName)
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setTagIfUsed(tags, "uuid", gpu.UUID)
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setTagIfUsed(tags, "compute_mode", gpu.ComputeMode)
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setIfUsed("int", fields, "fan_speed", gpu.FanSpeed)
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setIfUsed("int", fields, "memory_total", gpu.Memory.Total)
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setIfUsed("int", fields, "memory_used", gpu.Memory.Used)
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setIfUsed("int", fields, "memory_free", gpu.Memory.Free)
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setIfUsed("int", fields, "temperature_gpu", gpu.Temp.GPUTemp)
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setIfUsed("int", fields, "utilization_gpu", gpu.Utilization.GPU)
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setIfUsed("int", fields, "utilization_memory", gpu.Utilization.Memory)
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setIfUsed("int", fields, "pcie_link_gen_current", gpu.PCI.LinkInfo.PCIEGen.CurrentLinkGen)
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setIfUsed("int", fields, "pcie_link_width_current", gpu.PCI.LinkInfo.LinkWidth.CurrentLinkWidth)
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setIfUsed("int", fields, "encoder_stats_session_count", gpu.Encoder.SessionCount)
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setIfUsed("int", fields, "encoder_stats_average_fps", gpu.Encoder.AverageFPS)
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setIfUsed("int", fields, "encoder_stats_average_latency", gpu.Encoder.AverageLatency)
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setIfUsed("int", fields, "clocks_current_graphics", gpu.Clocks.Graphics)
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setIfUsed("int", fields, "clocks_current_sm", gpu.Clocks.SM)
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setIfUsed("int", fields, "clocks_current_memory", gpu.Clocks.Memory)
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setIfUsed("int", fields, "clocks_current_video", gpu.Clocks.Video)
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setIfUsed("float", fields, "power_draw", gpu.Power.PowerDraw)
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metrics = append(metrics, metric{tags, fields})
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}
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return metrics
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}
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// Parse the integers
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if m[1] == "integer" {
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out, err := strconv.ParseInt(col, 10, 64)
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if err != nil {
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return tags, fields, err
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}
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fields[m[0]] = out
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}
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// Parse the floats
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if m[1] == "float" {
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out, err := strconv.ParseFloat(col, 64)
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if err != nil {
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return tags, fields, err
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}
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fields[m[0]] = out
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func setTagIfUsed(m map[string]string, k, v string) {
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if v != "" {
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m[k] = v
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}
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}
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// Return the tags and fields
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return tags, fields, nil
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func setIfUsed(t string, m map[string]interface{}, k, v string) {
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vals := strings.Fields(v)
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if len(vals) < 1 {
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return
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}
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// If the line is empty return an emptyline error
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return tags, fields, fmt.Errorf("Different number of metrics returned (%d) than expeced (%d)", len(met), len(metricNames))
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val := vals[0]
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if k == "pcie_link_width_current" {
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val = strings.TrimSuffix(vals[0], "x")
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}
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switch t {
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case "float":
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if val != "" {
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f, err := strconv.ParseFloat(val, 64)
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if err == nil {
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m[k] = f
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}
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}
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case "int":
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if val != "" {
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i, err := strconv.Atoi(val)
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if err == nil {
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m[k] = i
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}
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}
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}
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}
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// SMI defines the structure for the output of _nvidia-smi -q -x_.
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type SMI struct {
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GPU GPU `xml:"gpu"`
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}
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// GPU defines the structure of the GPU portion of the smi output.
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type GPU []struct {
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FanSpeed string `xml:"fan_speed"` // int
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Memory MemoryStats `xml:"fb_memory_usage"`
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PState string `xml:"performance_state"`
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Temp TempStats `xml:"temperature"`
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ProdName string `xml:"product_name"`
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UUID string `xml:"uuid"`
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ComputeMode string `xml:"compute_mode"`
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Utilization UtilizationStats `xml:"utilization"`
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Power PowerReadings `xml:"power_readings"`
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PCI PCI `xml:"pci"`
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Encoder EncoderStats `xml:"encoder_stats"`
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Clocks ClockStats `xml:"clocks"`
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}
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// MemoryStats defines the structure of the memory portions in the smi output.
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type MemoryStats struct {
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Total string `xml:"total"` // int
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Used string `xml:"used"` // int
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Free string `xml:"free"` // int
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}
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// TempStats defines the structure of the temperature portion of the smi output.
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type TempStats struct {
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GPUTemp string `xml:"gpu_temp"` // int
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}
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// UtilizationStats defines the structure of the utilization portion of the smi output.
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type UtilizationStats struct {
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GPU string `xml:"gpu_util"` // int
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Memory string `xml:"memory_util"` // int
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}
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// PowerReadings defines the structure of the power_readings portion of the smi output.
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type PowerReadings struct {
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PowerDraw string `xml:"power_draw"` // float
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}
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// PCI defines the structure of the pci portion of the smi output.
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type PCI struct {
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LinkInfo struct {
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PCIEGen struct {
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CurrentLinkGen string `xml:"current_link_gen"` // int
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} `xml:"pcie_gen"`
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LinkWidth struct {
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CurrentLinkWidth string `xml:"current_link_width"` // int
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} `xml:"link_widths"`
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} `xml:"pci_gpu_link_info"`
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}
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// EncoderStats defines the structure of the encoder_stats portion of the smi output.
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type EncoderStats struct {
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SessionCount string `xml:"session_count"` // int
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AverageFPS string `xml:"average_fps"` // int
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AverageLatency string `xml:"average_latency"` // int
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}
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// ClockStats defines the structure of the clocks portion of the smi output.
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type ClockStats struct {
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Graphics string `xml:"graphics_clock"` // int
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SM string `xml:"sm_clock"` // int
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Memory string `xml:"mem_clock"` // int
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Video string `xml:"video_clock"` // int
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}
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@ -1,51 +1,99 @@
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package nvidia_smi
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import (
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"fmt"
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"testing"
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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/require"
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)
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func TestParseLineStandard(t *testing.T) {
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line := "41, 11264, 1074, 10190, P8, 32, GeForce RTX 2080 Ti, GPU-c97b7f88-c06d-650f-5339-f8dd0c1315c0, Default, 1, 4, 0, 24.33, 1, 16, 0, 0, 0, 300, 300, 405, 540\n"
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tags, fields, err := parseLine(line)
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if err != nil {
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t.Fail()
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}
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if tags["name"] != "GeForce RTX 2080 Ti" {
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t.Fail()
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}
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if temp, ok := fields["temperature_gpu"].(int); ok && temp != 32 {
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t.Fail()
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}
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var payload = []byte(`<?xml version="1.0" ?>
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<!DOCTYPE nvidia_smi_log SYSTEM "nvsmi_device_v10.dtd">
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<nvidia_smi_log>
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<gpu id="00000000:01:00.0">
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<product_name>GeForce GTX 1070 Ti</product_name>
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<uuid>GPU-f9ba66fc-a7f5-94c5-da19-019ef2f9c665</uuid>
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<pci>
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<pci_gpu_link_info>
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<pcie_gen>
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<current_link_gen>1</current_link_gen>
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</pcie_gen>
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<link_widths>
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<current_link_width>16x</current_link_width>
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</link_widths>
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</pci_gpu_link_info>
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</pci>
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<fan_speed>100 %</fan_speed>
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<performance_state>P8</performance_state>
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<fb_memory_usage>
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<total>4096 MiB</total>
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<used>42 MiB</used>
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<free>4054 MiB</free>
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</fb_memory_usage>
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<compute_mode>Default</compute_mode>
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<utilization>
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<gpu_util>0 %</gpu_util>
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<memory_util>0 %</memory_util>
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</utilization>
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<encoder_stats>
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<session_count>0</session_count>
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<average_fps>0</average_fps>
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<average_latency>0</average_latency>
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</encoder_stats>
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<temperature>
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<gpu_temp>39 C</gpu_temp>
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</temperature>
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<power_readings>
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<power_draw>N/A</power_draw>
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</power_readings>
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<clocks>
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<graphics_clock>135 MHz</graphics_clock>
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<sm_clock>135 MHz</sm_clock>
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<mem_clock>405 MHz</mem_clock>
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<video_clock>405 MHz</video_clock>
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</clocks>
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</gpu>
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</nvidia_smi_log>`)
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func TestGatherSMI(t *testing.T) {
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var expectedMetric = struct {
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tags map[string]string
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fields map[string]interface{}
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}{
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tags: map[string]string{
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"name": "GeForce GTX 1070 Ti",
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"compute_mode": "Default",
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"index": "0",
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"pstate": "P8",
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"uuid": "GPU-f9ba66fc-a7f5-94c5-da19-019ef2f9c665",
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},
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fields: map[string]interface{}{
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"fan_speed": 100,
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"memory_free": 4054,
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"memory_used": 42,
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"memory_total": 4096,
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"temperature_gpu": 39,
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"utilization_gpu": 0,
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"utilization_memory": 0,
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"pcie_link_gen_current": 1,
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"pcie_link_width_current": 16,
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"encoder_stats_session_count": 0,
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"encoder_stats_average_fps": 0,
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"encoder_stats_average_latency": 0,
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"clocks_current_graphics": 135,
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"clocks_current_sm": 135,
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"clocks_current_memory": 405,
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"clocks_current_video": 405,
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},
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}
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func TestParseLineEmptyLine(t *testing.T) {
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line := "\n"
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_, _, err := parseLine(line)
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if err == nil {
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t.Fail()
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}
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}
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acc := &testutil.Accumulator{}
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func TestParseLineBad(t *testing.T) {
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line := "the quick brown fox jumped over the lazy dog"
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_, _, err := parseLine(line)
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if err == nil {
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t.Fail()
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}
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}
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gatherNvidiaSMI(payload, acc)
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fmt.Println()
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func TestParseLineNotSupported(t *testing.T) {
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line := "[Not Supported], 11264, 1074, 10190, P8, 32, GeForce RTX 2080 Ti, GPU-c97b7f88-c06d-650f-5339-f8dd0c1315c0, Default, 1, 4, 0, 24.33, 1, 16, 0, 0, 0, 300, 300, 405, 540\n"
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_, fields, err := parseLine(line)
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require.NoError(t, err)
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require.Equal(t, nil, fields["fan_speed"])
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}
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func TestParseLineUnknownError(t *testing.T) {
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line := "[Unknown Error], 11264, 1074, 10190, P8, 32, GeForce RTX 2080 Ti, GPU-c97b7f88-c06d-650f-5339-f8dd0c1315c0, Default, 1, 4, 0, 24.33, 1, 16, 0, 0, 0, 300, 300, 405, 540\n"
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_, fields, err := parseLine(line)
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require.NoError(t, err)
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require.Equal(t, nil, fields["fan_speed"])
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require.Equal(t, 1, len(acc.Metrics))
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require.Equal(t, expectedMetric.fields, acc.Metrics[0].Fields)
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require.Equal(t, expectedMetric.tags, acc.Metrics[0].Tags)
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}
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