File size: 1,511 Bytes
3959f31 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | //go:build glibc && linux && amd64
package agent
import (
"log/slog"
"os"
"path/filepath"
"strings"
"github.com/ebitengine/purego"
)
func openLibrary(name string) (uintptr, error) {
return purego.Dlopen(name, purego.RTLD_NOW|purego.RTLD_GLOBAL)
}
func getNVMLPath() string {
return "libnvidia-ml.so.1"
}
func hasSymbol(lib uintptr, symbol string) bool {
_, err := purego.Dlsym(lib, symbol)
return err == nil
}
func (c *nvmlCollector) isGPUActive(bdf string) bool {
// runtime_status
statusPath := filepath.Join("/sys/bus/pci/devices", bdf, "power/runtime_status")
status, err := os.ReadFile(statusPath)
if err != nil {
slog.Debug("NVML: Can't read runtime_status", "bdf", bdf, "err", err)
return true // Assume active if we can't read status
}
statusStr := strings.TrimSpace(string(status))
if statusStr != "active" && statusStr != "resuming" {
slog.Debug("NVML: GPU not active", "bdf", bdf, "status", statusStr)
return false
}
// power_state (D0 check)
// Find any drm card device power_state
pstatePathPattern := filepath.Join("/sys/bus/pci/devices", bdf, "drm/card*/device/power_state")
matches, _ := filepath.Glob(pstatePathPattern)
if len(matches) > 0 {
pstate, err := os.ReadFile(matches[0])
if err == nil {
pstateStr := strings.TrimSpace(string(pstate))
if pstateStr != "D0" {
slog.Debug("NVML: GPU not in D0 state", "bdf", bdf, "pstate", pstateStr)
return false
}
}
}
return true
}
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