More trace analysis scripts.

[bluesky.git] / parsetrace / ipt.py

diff --git a/parsetrace/ipt.py b/parsetrace/ipt.py
new file mode 100755 (executable)
index 0000000..ab76dc8
--- /dev/null
+++ b/parsetrace/ipt.py
@@ -0,0 +1,25 @@
+#!/usr/bin/python
+#
+# Analyze the inter-packet times of requests to/from cloud storage providers.
+
+import json, sys
+
+RTT_EST = 0.03
+
+def analyze_transfer(timings):
+    for (delay, bytes) in timings:
+        gap = False
+        if delay > 2 * RTT_EST:
+            gap = True
+            print "Long gap of", delay
+        elif delay > RTT_EST / 2:
+            gap = True
+            print "Short gap of", delay
+        if gap:
+            print "    [occurred after", bytes, "bytes]"
+
+for f in sys.argv[1:]:
+    stats = json.load(open(f))
+    for s in stats:
+        if 'interpacket_times' in s:
+            analyze_transfer(s['interpacket_times'])