tools/perf/scripts/python/sctop.py

   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
  11 from __future__ import print_function
  12
  13 import os, sys, time
  14
  15 try:
  16         import thread
  17 except ImportError:
  18         import _thread as thread
  19
  20 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
  21         '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
  22
  23 from perf_trace_context import *
  24 from Core import *
  25 from Util import *
  26
  27 usage = "perf script -s sctop.py [comm] [interval]\n";
  28
  29 for_comm = None
  30 default_interval = 3
  31 interval = default_interval
  32
  33 if len(sys.argv) > 3:
  34         sys.exit(usage)
  35
  36 if len(sys.argv) > 2:
  37         for_comm = sys.argv[1]
  38         interval = int(sys.argv[2])
  39 elif len(sys.argv) > 1:
  40         try:
  41                 interval = int(sys.argv[1])
  42         except ValueError:
  43                 for_comm = sys.argv[1]
  44                 interval = default_interval
  45
  46 syscalls = autodict()
  47
  48 def trace_begin():
  49         thread.start_new_thread(print_syscall_totals, (interval,))
  50         pass
  51
  52 def raw_syscalls__sys_enter(event_name, context, common_cpu,
  53         common_secs, common_nsecs, common_pid, common_comm,
  54         common_callchain, id, args):
  55         if for_comm is not None:
  56                 if common_comm != for_comm:
  57                         return
  58         try:
  59                 syscalls[id] += 1
  60         except TypeError:
  61                 syscalls[id] = 1
  62
  63 def syscalls__sys_enter(event_name, context, common_cpu,
  64         common_secs, common_nsecs, common_pid, common_comm,
  65         id, args):
  66         raw_syscalls__sys_enter(**locals())
  67
  68 def print_syscall_totals(interval):
  69         while 1:
  70                 clear_term()
  71                 if for_comm is not None:
  72                         print("\nsyscall events for %s:\n" % (for_comm))
  73                 else:
  74                         print("\nsyscall events:\n")
  75
  76                 print("%-40s  %10s" % ("event", "count"))
  77                 print("%-40s  %10s" %
  78                         ("----------------------------------------",
  79                         "----------"))
  80
  81                 for id, val in sorted(syscalls.items(),
  82                                 key = lambda kv: (kv[1], kv[0]),
  83                                 reverse = True):
  84                         try:
  85                                 print("%-40s  %10d" % (syscall_name(id), val))
  86                         except TypeError:
  87                                 pass
  88                 syscalls.clear()
  89                 time.sleep(interval)