metrics: fix the panic for reading empty cpu stats (ethereum#21864)

enriquefynn · Feb 15, 2021 · 1364186 · 1364186
1 parent a3c9929
commit 1364186
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/metrics/cpu_enabled.go b/metrics/cpu_enabled.go
@@ -31,6 +31,10 @@ func ReadCPUStats(stats *CPUStats) {
  log.Error("Could not read cpu stats", "err", err)
  return
  }
+ if len(timeStats) == 0 {
+ log.Error("Empty cpu stats")
+ return
+ }
  // requesting all cpu times will always return an array with only one time stats entry
  timeStat := timeStats[0]
  stats.GlobalTime = int64((timeStat.User + timeStat.Nice + timeStat.System) * cpu.ClocksPerSec)