L2SS-244: Initialise parameters in the right class, added comments.

devices/clients/sst_client.py

@@ -124,8 +124,14 @@ class UDP_Receiver(Thread):
         self.disconnect_timeout = disconnect_timeout
 
         self.parameters = {
-            "nof_packets_received": numpy.uint64(0),
-            "nof_packets_dropped":  numpy.uint64(0),
+            # Number of packets we received
+            "nof_packets_received":  numpy.uint64(0),
+            # Number of packets we had to drop due to a full queue
+            "nof_packets_dropped":   numpy.uint64(0),
+            # Packets are at most 9000 bytes, the largest payload (well, MTU) of an Ethernet Jumbo frame
+            "last_packet":           numpy.zeros((9000,), dtype=numpy.uint8),
+            # Timestamp of when the last packet was received
+            "last_packet_timestamp": numpy.uint64(0),
         }
 
         logger.debug("binding a socket on UDP port {}:{}".format(self.host, self.port))
@@ -154,7 +160,6 @@ class UDP_Receiver(Thread):
 
         while self.stream_on:
             try:
-                # Packets are at most 9000 bytes, the largest payload (well, MTU) of an Ethernet Jumbo frame
                 packet, _, _, _ = self.sock.recvmsg(9000)
 
                 self.parameters["nof_packets_received"]  += numpy.uint64(1)
@@ -212,8 +217,6 @@ class SST_collector(Thread):
 
         self.parameters = {
             "nof_packets":           numpy.uint64(0),
-            "last_packet":           numpy.zeros((9000,), dtype=numpy.uint8),
-            "last_packet_timestamp": numpy.uint64(0),
             "queue_fill_percentage": numpy.float32(self.queue_fill_percentage()),
 
             # Packet count for packets that could not be parsed as SSTs