Added help for columns

benchmark3.py

@@ -13,6 +13,7 @@ import queue
 import sys
 import csv
 import random
+import textwrap
 
 
 @dataclass(frozen=False, init=True)
@@ -164,10 +165,22 @@ def write_results(results, file_handle):
 
 
 def main():
-    parser = argparse.ArgumentParser(
-        description='Birbnetes Benchmarker 3'
-    )
+    help_epilog = textwrap.dedent('''\
+    CSV Columns meaning:
+        id - Unique ID of a request (not sequential but at least unique)
+        http_start_time - Timestamp of when the HTTP request is started
+        http_complete_time - Timestamp of when the HTTP request is completed
+        status_code - Status code of the HTTP request
+        mqtt_arrive_time - Timestamp of when the corresponding MQTT message arrived
+        latency - Latency of the system (http_complete_time - mqtt_arrive_time) in milliseconds
+        rtt - Total round trip time (http_start_time - mqtt_arrive_time) in milliseconds
+    ''')
 
+    parser = argparse.ArgumentParser(
+        description='Birbnetes Benchmarker 3',
+        epilog=help_epilog,
+        formatter_class=argparse.RawTextHelpFormatter
+    )
     parser.add_argument('--workers', type=int, required=False, default=1, help='Number of workers (or threads)')
     parser.add_argument('--timeout', type=int, required=False, default=10,
                         help='Maximum time for request sending (0 for unlimited)')