Fix disk/network IO measurements

main.go

@@ -55,6 +55,8 @@ var (
 	blockers        []string
 	currentStatus   ResourceUsage
 	nvmlAvailable   bool
+	networkBytesIO  uint64
+	diskBytesIO     uint64
 	lastBlockedTime time.Time
 )
 
@@ -267,12 +269,19 @@ func updateCurrentUsage() {
 		for _, stat := range diskStats {
 			totalIO += stat.ReadBytes + stat.WriteBytes
 		}
-		usage.DiskIO = float64(totalIO)
+
+		previousDiskBytesIO := diskBytesIO
+		diskBytesIO = totalIO
+		diff := diskBytesIO - previousDiskBytesIO
+		usage.DiskIO = float64(diff) / checkInterval.Seconds()
 	}
 
 	// Get network I/O
 	if netStats, err := net.IOCounters(false); err == nil && len(netStats) > 0 {
-		usage.NetworkIO = float64(netStats[0].BytesSent + netStats[0].BytesRecv)
+		previousNetworkBytesIO := networkBytesIO
+		networkBytesIO = netStats[0].BytesSent + netStats[0].BytesRecv
+		diff := networkBytesIO - previousNetworkBytesIO
+		usage.NetworkIO = float64(diff) / checkInterval.Seconds()
 	}
 
 	// Count SSH connections