X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=bindings%2Fpython%2Fexamples%2Fsyscalls_by_pid.py;fp=bindings%2Fpython%2Fexamples%2Fsyscalls_by_pid.py;h=3ae342e6d3ded998143f8eead13139cd9ca3ec9f;hp=0000000000000000000000000000000000000000;hb=24a3136a3837ee43162b1393827faa938f0789eb;hpb=2002e48a9f3f38f95de0b9cd75a6ab1f06580c95

diff --git a/bindings/python/examples/syscalls_by_pid.py b/bindings/python/examples/syscalls_by_pid.py
new file mode 100644
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+++ b/bindings/python/examples/syscalls_by_pid.py
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+# syscall_by_pid.py
+# 
+# Babeltrace syscall by pid example script
+# 
+# Copyright 2012 EfficiOS Inc.
+# 
+# Author: Danny Serres <danny.serres@efficios.com>
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# The script checks the number of events in the trace
+# and outputs a table and a .svg histogram for the specified
+# range (microseconds) or the total trace if no range specified.
+# The graph is generated using the cairoplot module.
+
+# The script checks all syscall in the trace and prints a list
+# showing the number of systemcalls executed by each PID
+# ordered from greatest to least number of syscalls.
+# The trace needs PID context (lttng add-context -k -t pid)
+
+import sys
+from babeltrace import *
+from output_format_modules.pprint_table import pprint_table as pprint
+
+if len(sys.argv) < 2 :
+	raise TypeError("Usage: python syscalls_by_pid.py path/to/trace")
+
+ctx = Context()
+ret = ctx.add_trace(sys.argv[1], "ctf")
+if ret is None:
+	raise IOError("Error adding trace")
+
+data = {}
+
+# Setting iterator
+bp = IterPos(SEEK_BEGIN)
+ctf_it = ctf.Iterator(ctx, bp)
+
+# Reading events
+event = ctf_it.read_event()
+while event is not None:
+	if event.get_name().find("sys") >= 0:
+		# Getting scope definition
+		sco = event.get_top_level_scope(ctf.scope.STREAM_EVENT_CONTEXT)
+		if sco is None:
+			print("ERROR: Cannot get definition scope for {}".format(
+				event.get_name()))
+		else:
+			# Getting PID
+			pid_field = event.get_field(sco, "_pid")
+			pid = pid_field.get_int64()
+
+			if ctf.field_error():
+				print("ERROR: Missing PID info for sched_switch".format(
+					event.get_name()))
+			elif pid in data:
+				data[pid] += 1
+			else:
+				data[pid] = 1
+	# Next event
+	ret = ctf_it.next()
+	if ret < 0:
+		break
+	event = ctf_it.read_event()
+
+del ctf_it
+
+# Setting table for output
+table = []
+for item in data:
+	table.append([data[item], item])  # [count, pid]
+table.sort(reverse = True)	# [big count first, pid]
+for i in range(len(table)):
+	table[i].reverse()	# [pid, big count first]
+table.insert(0, ["PID", "SYSCALL COUNT"])
+pprint(table)