Perf application for congestion control experiments.

src/apps/CMakeLists.txt

@@ -7,3 +7,4 @@ add_subdirectory(ping)
 add_subdirectory(rocksdb_server)
 add_subdirectory(jring_perf)
 add_subdirectory(jring2_perf)
+add_subdirectory(cc_perf)

src/apps/cc_perf/CMakeLists.txt

@@ -0,0 +1,3 @@
+set(target_name cc_perf)
+add_executable (${target_name} main.cc)
+target_link_libraries(${target_name} LINK_PUBLIC core glog ${LIBDPDK_LIBRARIES})

src/apps/cc_perf/README.md

@@ -0,0 +1,45 @@
+# Packet Drop or Delay application (cc_perf)
+
+This is a simple packet drop or delay app. It is mainly designed for debugging and developing of congestion control solutions in Machnet.
+
+## Prerequisites
+
+Successful build of the `Machnet` project (see main [README](../../../README.md)).
+
+## Running the application
+
+### Configuration
+
+The `cc_perf` application shares the same configuration file as the Machnet stack. You may check [config.json](../machnet/config.json) for an example.
+
+The `cc_perf` application ignores the `engine_threads` directive in the configuration. Instead, it
+uses a single thread for both sending and receiving packets.
+
+**Attention:** When running in Microsoft Azure, the recommended DPDK driver for the accelerated NIC is [`hn_netvsc`](https://doc.dpdk.org/guides/nics/netvsc.html). Check [here](../machnet/README.md#configuration) for instructions on how to bind the NIC to the `uio_hv_generic` driver.
+### Running in drop mode
+
+When running in this mode the application is dropping packets. It also receives packets and prints the achieved PPS rate.
+
+
+```bash
+# Drop packets with 10% drop rate between two machnines with .
+cd ${REPOROOT}/build/
+sudo GLOG_logtostderr=1 ./src/apps/cc_perf/cc_perf -remote_ip $REMOTE_IP -sremote_ip $SECOND_REMOTE_IP -drop_mode -drop_rate 10
+
+# If ran from a different directory, you may need to specify the path to the config file:
+sudo GLOG_logtostderr=1 ./cc_perf --config_file ${REPOROOT}/src/apps/machnet/config.json -remote_ip $REMOTE_IP -sremote_ip $SECOND_REMOTE_IP -forward_drop -drop_rate 0.1 
+
+```
+
+### Running in delay mode
+
+When running in this mode the application is delaying packets. It also receives packets and prints the achieved PPS rate.
+
+
+```bash
+# Drop packets with 10% drop rate between two machnines with .
+cd ${REPOROOT}/build/
+sudo GLOG_logtostderr=1 ./src/apps/cc_perf/cc_perf -remote_ip $REMOTE_IP -sremote_ip $SECOND_REMOTE_IP -delay 10 # in microseconds
+
+# If ran from a different directory, you may need to specify the path to the config file:
+sudo GLOG_logtostderr=1 ./cc_perf --config_file ${REPOROOT}/src/apps/machnet/config.json -remote_ip $REMOTE_IP -sremote_ip $SECOND_REMOTE_IP -delay 1