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Estimate fan duty from observed RPM maxima

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This commit is contained in:
Mikhail Chusavitin
2026-04-16 10:10:18 +03:00
parent e306250da7
commit 18e24a9aa5
5 changed files with 273 additions and 53 deletions
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audit/internal/platform/gpu_metrics.go
+8 -3
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@@ -27,6 +27,7 @@ type GPUMetricRow struct {
FanAvgRPM float64 `json:"fan_avg_rpm,omitempty"`
FanDutyCyclePct float64 `json:"fan_duty_cycle_pct,omitempty"`
FanDutyCycleAvailable bool `json:"fan_duty_cycle_available,omitempty"`
FanDutyCycleEstimated bool `json:"fan_duty_cycle_estimated,omitempty"`
}
// sampleGPUMetrics runs nvidia-smi once and returns current metrics for each GPU.
@@ -147,14 +148,18 @@ func sampleAMDGPUMetrics() ([]GPUMetricRow, error) {
// WriteGPUMetricsCSV writes collected rows as a CSV file.
func WriteGPUMetricsCSV(path string, rows []GPUMetricRow) error {
var b bytes.Buffer
b.WriteString("stage,elapsed_sec,gpu_index,temperature_c,usage_pct,mem_usage_pct,power_w,clock_mhz,mem_clock_mhz,fan_avg_rpm,fan_duty_cycle_pct,fan_duty_cycle_available\n")
b.WriteString("stage,elapsed_sec,gpu_index,temperature_c,usage_pct,mem_usage_pct,power_w,clock_mhz,mem_clock_mhz,fan_avg_rpm,fan_duty_cycle_pct,fan_duty_cycle_available,fan_duty_cycle_estimated\n")
for _, r := range rows {
dutyAvail := 0
if r.FanDutyCycleAvailable {
dutyAvail = 1
}
fmt.Fprintf(&b, "%s,%.1f,%d,%.1f,%.1f,%.1f,%.1f,%.0f,%.0f,%.0f,%.1f,%d\n",
strconv.Quote(strings.TrimSpace(r.Stage)), r.ElapsedSec, r.GPUIndex, r.TempC, r.UsagePct, r.MemUsagePct, r.PowerW, r.ClockMHz, r.MemClockMHz, r.FanAvgRPM, r.FanDutyCyclePct, dutyAvail)
dutyEstimated := 0
if r.FanDutyCycleEstimated {
dutyEstimated = 1
}
fmt.Fprintf(&b, "%s,%.1f,%d,%.1f,%.1f,%.1f,%.1f,%.0f,%.0f,%.0f,%.1f,%d,%d\n",
strconv.Quote(strings.TrimSpace(r.Stage)), r.ElapsedSec, r.GPUIndex, r.TempC, r.UsagePct, r.MemUsagePct, r.PowerW, r.ClockMHz, r.MemClockMHz, r.FanAvgRPM, r.FanDutyCyclePct, dutyAvail, dutyEstimated)
}
return os.WriteFile(path, b.Bytes(), 0644)
}