1# system call top
2# (c) 2010, Tom Zanussi <tzanussi@gmail.com>
3# Licensed under the terms of the GNU GPL License version 2
4#
5# Periodically displays system-wide system call totals, broken down by
6# syscall.  If a [comm] arg is specified, only syscalls called by
7# [comm] are displayed. If an [interval] arg is specified, the display
8# will be refreshed every [interval] seconds.  The default interval is
9# 3 seconds.
10
11import os, sys, thread, time
12
13sys.path.append(os.environ['PERF_EXEC_PATH'] + \
14	'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
15
16from perf_trace_context import *
17from Core import *
18from Util import *
19
20usage = "perf script -s sctop.py [comm] [interval]\n";
21
22for_comm = None
23default_interval = 3
24interval = default_interval
25
26if len(sys.argv) > 3:
27	sys.exit(usage)
28
29if len(sys.argv) > 2:
30	for_comm = sys.argv[1]
31	interval = int(sys.argv[2])
32elif len(sys.argv) > 1:
33	try:
34		interval = int(sys.argv[1])
35	except ValueError:
36		for_comm = sys.argv[1]
37		interval = default_interval
38
39syscalls = autodict()
40
41def trace_begin():
42	thread.start_new_thread(print_syscall_totals, (interval,))
43	pass
44
45def raw_syscalls__sys_enter(event_name, context, common_cpu,
46	common_secs, common_nsecs, common_pid, common_comm,
47	common_callchain, id, args):
48	if for_comm is not None:
49		if common_comm != for_comm:
50			return
51	try:
52		syscalls[id] += 1
53	except TypeError:
54		syscalls[id] = 1
55
56def syscalls__sys_enter(event_name, context, common_cpu,
57	common_secs, common_nsecs, common_pid, common_comm,
58	id, args):
59	raw_syscalls__sys_enter(**locals())
60
61def print_syscall_totals(interval):
62	while 1:
63		clear_term()
64		if for_comm is not None:
65			print "\nsyscall events for %s:\n\n" % (for_comm),
66		else:
67			print "\nsyscall events:\n\n",
68
69		print "%-40s  %10s\n" % ("event", "count"),
70		print "%-40s  %10s\n" % ("----------------------------------------", \
71						 "----------"),
72
73		for id, val in sorted(syscalls.iteritems(), key = lambda(k, v): (v, k), \
74					      reverse = True):
75			try:
76				print "%-40s  %10d\n" % (syscall_name(id), val),
77			except TypeError:
78				pass
79		syscalls.clear()
80		time.sleep(interval)
81