[interpreter] Add relative numbers to dispatch report

tools/ignition/bytecode_dispatches_report_test.py

 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import bytecode_dispatches_report as bdr
 import unittest
 
 
 class BytecodeDispatchesReportTest(unittest.TestCase):
   def test_find_top_counters(self):
@@ skipping 25 matching lines @@
       "b": {"a":  1, "c":  4},
       "c": {"a": 42, "b": 12, "c": 99}
     })
     self.assertListEqual(top_dispatch_sources, [
       ('c', 153),
       ('a',  25),
       ('b',   5)
     ])
 
   def test_find_top_dispatch_sources(self):
-    top_dispatch_sources = bdr.find_top_dispatch_sources({
-      "a": {"a": 10, "b":  8, "c":  7},
+    d = {
+      "a": {"a":  4, "b":  2, "c":  4},
       "b": {"a":  1, "c":  4},
-      "c": {"a": 42, "b": 12, "c": 99}
-    }, "b", 10)
-    self.assertListEqual(top_dispatch_sources, [
-      ("c", 12),
-      ("a",  8)
+      "c": {"a": 40, "b": 10, "c": 50}
+    }
+    top_sources, top_destinations = bdr.find_top_dispatch_sources(d, "b", 10, False)
+    self.assertListEqual(top_sources, [
+      ("c", (10, 0.1)),
+      ("a", (2, 0.2))
     ])
+    top_sources, top_destinations = bdr.find_top_dispatch_sources(d, "b", 10, True)
+    self.assertListEqual(top_sources, [
+      ("a",  (2, 0.2)),
+      ("c", (10, 0.1))
+    ])