aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rwxr-xr-xscripts/simpletrace.py23
1 files changed, 22 insertions, 1 deletions
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index 4c990047b6..d60b3a08f7 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -116,7 +116,28 @@ class Analyzer(object):
is invoked.
If a method matching a trace event name exists, it is invoked to process
- that trace record. Otherwise the catchall() method is invoked."""
+ that trace record. Otherwise the catchall() method is invoked.
+
+ Example:
+ The following method handles the runstate_set(int new_state) trace event::
+
+ def runstate_set(self, new_state):
+ ...
+
+ The method can also take a timestamp argument before the trace event
+ arguments::
+
+ def runstate_set(self, timestamp, new_state):
+ ...
+
+ Timestamps have the uint64_t type and are in nanoseconds.
+
+ The pid can be included in addition to the timestamp and is useful when
+ dealing with traces from multiple processes::
+
+ def runstate_set(self, timestamp, pid, new_state):
+ ...
+ """
def begin(self):
"""Called at the start of the trace."""