Using X-Lap with CLOCK_MONOTONIC.

prrt/proto/processes/dataReceiver.c

@@ -241,7 +241,7 @@ void receive_from_socket(PrrtSocket *socket_ptr, unsigned char buffer_ptr[65528]
     } else {
         *received_size = recvfrom(socket_ptr->dataSocketFd, buffer_ptr, MAX_PAYLOAD_LENGTH, 0,
                                   (struct sockaddr *) remote_ptr, remote_len_ptr);
-        clock_gettime(CLOCK_REALTIME, packet_timestamp_ptr);
+        clock_gettime(CLOCK_MONOTONIC, packet_timestamp_ptr);
     }
     *packet_cyclestamp_ptr = __builtin_ia32_rdtsc();
 }

prrt/proto/processes/dataTransmitter.c

@@ -60,7 +60,7 @@ bool send_to_socket(PrrtSocket* sock_ptr, PrrtReceiver *recv, uint8_t* buf, prrt
         // TODO: [LATENCY] By knowing the time encoding etc. that happens upfront, one could make an adjustment here.
         check(sendto(sock_ptr->dataSocketFd, buf, length, 0, recv->ai->ai_addr, recv->ai->ai_addrlen) ==
               length, "Sendto failed.");
-        clock_gettime(CLOCK_REALTIME, packet_timestamp);
+        clock_gettime(CLOCK_MONOTONIC, packet_timestamp);
         *packet_clockstamp = __builtin_ia32_rdtsc();
         debug(DEBUG_HARDSTAMPING, "Software TS:\t%ld.%09ld", (long) packet_timestamp->tv_sec, (long) packet_timestamp->tv_nsec);
     }

xlap @ 116a01bd

-Subproject commit 00d0d00faaaa7b5a97d3db4de64a59be3d9bee5e
+Subproject commit 116a01bd708b76d11124f6dd773d56bbecb93ebf