Add a --profile option to spot which task takes more time

1 files changed, 49 insertions, 0 deletions

diff --git a/ansible-profile/callback_plugins/profile_tasks.py b/ansible-profile/callback_plugins/profile_tasks.py
new file mode 100644
index 000000000..dc74ee291
--- /dev/null
+++ b/ansible-profile/callback_plugins/profile_tasks.py
@@ -0,0 +1,49 @@
+import time
+
+
+class CallbackModule(object):
+    """
+    A plugin for timing tasks
+    """
+    def __init__(self):
+        self.stats = {}
+        self.current = None
+
+    def playbook_on_task_start(self, name, is_conditional):
+        """
+        Logs the start of each task
+        """
+        if self.current is not None:
+            # Record the running time of the last executed task
+            self.stats[self.current] = time.time() - self.stats[self.current]
+
+        # Record the start time of the current task
+        self.current = name
+        self.stats[self.current] = time.time()
+
+    def playbook_on_stats(self, stats):
+        """
+        Prints the timings
+        """
+        # Record the timing of the very last task
+        if self.current is not None:
+            self.stats[self.current] = time.time() - self.stats[self.current]
+
+        # Sort the tasks by their running time
+        results = sorted(
+            self.stats.items(),
+            key=lambda value: value[1],
+            reverse=True,
+        )
+
+        # Just keep the top 10
+        results = results[:10]
+
+        # Print the timings
+        for name, elapsed in results:
+            print(
+                "{0:-<70}{1:->9}".format(
+                    '{0} '.format(name),
+                    ' {0:.02f}s'.format(elapsed),
+                )
+            )