rare/watch-intr.py: utility for watching /proc/interrupts

Useful for using over SSH.

1 files changed, 33 insertions, 0 deletions

diff --git a/rare/watch-intr.py b/rare/watch-intr.py
new file mode 100755
index 0000000..52031eb
--- /dev/null
+++ b/rare/watch-intr.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+# Light-weight tool to watch the /proc/interrupts file, to be combined like:
+#
+#   ./watch-intr.py > intr.txt
+#   ./interrupts-graph.py -i intr.txt
+
+import argparse, sys, time
+
+parser = argparse.ArgumentParser()
+parser.add_argument("limit", type=int, default=0, nargs="?",
+        help="Number of repetitions (or 0 for infinity), default %(default)d")
+parser.add_argument("delay", type=int, default=1, nargs="?",
+        help="Interval between printing, default %(default)d second")
+
+args = parser.parse_args()
+limit, delay = args.limit, args.delay
+
+def print_and_flush(data):
+    sys.stdout.write(data)
+    sys.stdout.write("\n")
+    sys.stdout.flush()
+
+try:
+    with open("/proc/interrupts") as f:
+        print_and_flush(f.read())
+        while limit != 1:
+            if limit > 0:
+                limit -= 1
+            time.sleep(delay)
+            f.seek(0)
+            print_and_flush(f.read())
+except KeyboardInterrupt:
+    pass