[RFC PATCH 4/7] usertools/telemetry-watcher: add total and one-line opts

[Bruce Richardson <bruce.richardson@intel.com>]

Add options to the script to print out totals at the end of each line,
and to print each line replacing the previous one, saving the output
scrolling up the screen constantly.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 usertools/dpdk-telemetry-watcher.py | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/usertools/dpdk-telemetry-watcher.py b/usertools/dpdk-telemetry-watcher.py
index 8af9af867c..bdf1423dd3 100755
--- a/usertools/dpdk-telemetry-watcher.py
+++ b/usertools/dpdk-telemetry-watcher.py
@@ -210,10 +210,13 @@ def monitor_stats(process, args):
     header = "Time".ljust(10)
     for spec, _, _ in parsed_specs:
         header += spec.rjust(25)
+    if args.total:
+        header += "Total".rjust(25)
     print(header)
 
     # Monitor loop - once per second
     count = 0
+    line_ending = "\r" if args.single_line else "\n"
     try:
         while args.timeout is None or count < args.timeout:
             time.sleep(1)
@@ -223,6 +226,7 @@ def monitor_stats(process, args):
             row = timestamp.ljust(10)
 
             current_values = []
+            total = 0
             for i, (spec, command, field) in enumerate(parsed_specs):
                 data = query_telemetry(process, command)
                 current_value = data[field]
@@ -233,11 +237,17 @@ def monitor_stats(process, args):
                 else:
                     display_value = current_value
 
+                total += display_value
                 row += str(display_value).rjust(25)
 
-            print(row)
+            if args.total:
+                row += str(total).rjust(25)
+
+            print(row, end=line_ending, flush=True)
             prev_values = current_values
     except KeyboardInterrupt:
+        if args.single_line:
+            print()  # Add newline before exit message
         print("\nMonitoring stopped")
 
 
@@ -282,6 +292,21 @@ def main():
         default=False,
         help="Display delta values instead of absolute values",
     )
+    parser.add_argument(
+        "-T",
+        "--total",
+        action="store_true",
+        default=False,
+        help="Display a total column at the end of each row",
+    )
+    parser.add_argument(
+        "-1",
+        "--single-line",
+        action="store_true",
+        default=False,
+        dest="single_line",
+        help="Display output on a single line, replacing the previous output",
+    )
     parser.add_argument(
         "stats",
         nargs="*",
-- 
2.51.0