Linux Kernel  3.7.1
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sctop.py
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1 # system call top
2 # (c) 2010, Tom Zanussi <[email protected]>
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 
11 import os, sys, thread, time
12 
13 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
14  '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
15 
16 from perf_trace_context import *
17 from Core import *
18 from Util import *
19 
20 usage = "perf script -s sctop.py [comm] [interval]\n";
21 
22 for_comm = None
23 default_interval = 3
24 interval = default_interval
25 
26 if len(sys.argv) > 3:
27  sys.exit(usage)
28 
29 if len(sys.argv) > 2:
30  for_comm = sys.argv[1]
31  interval = int(sys.argv[2])
32 elif 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 
39 syscalls = autodict()
40 
42  thread.start_new_thread(print_syscall_totals, (interval,))
43  pass
44 
45 def raw_syscalls__sys_enter(event_name, context, common_cpu,
46  common_secs, common_nsecs, common_pid, common_comm,
47  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 
56 def print_syscall_totals(interval):
57  while 1:
58  clear_term()
59  if for_comm is not None:
60  print "\nsyscall events for %s:\n\n" % (for_comm),
61  else:
62  print "\nsyscall events:\n\n",
63 
64  print "%-40s %10s\n" % ("event", "count"),
65  print "%-40s %10s\n" % ("----------------------------------------", \
66  "----------"),
67 
68  for id, val in sorted(syscalls.iteritems(), key = lambda(k, v): (v, k), \
69  reverse = True):
70  try:
71  print "%-40s %10d\n" % (syscall_name(id), val),
72  except TypeError:
73  pass
74  syscalls.clear()
75  time.sleep(interval)