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