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 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 trace -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
  41 def trace_begin():
  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)