tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py

   1 # Util.py - Python extension for perf script, miscellaneous utility code
   2 #
   3 # Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
   4 #
   5 # This software may be distributed under the terms of the GNU General
   6 # Public License ("GPL") version 2 as published by the Free Software
   7 # Foundation.
   8
   9 import errno, os
  10
  11 FUTEX_WAIT = 0
  12 FUTEX_WAKE = 1
  13 FUTEX_PRIVATE_FLAG = 128
  14 FUTEX_CLOCK_REALTIME = 256
  15 FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
  16
  17 NSECS_PER_SEC    = 1000000000
  18
  19 def avg(total, n):
  20     return total / n
  21
  22 def nsecs(secs, nsecs):
  23     return secs * NSECS_PER_SEC + nsecs
  24
  25 def nsecs_secs(nsecs):
  26     return nsecs / NSECS_PER_SEC
  27
  28 def nsecs_nsecs(nsecs):
  29     return nsecs % NSECS_PER_SEC
  30
  31 def nsecs_str(nsecs):
  32     str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
  33     return str
  34
  35 def add_stats(dict, key, value):
  36         if not dict.has_key(key):
  37                 dict[key] = (value, value, value, 1)
  38         else:
  39                 min, max, avg, count = dict[key]
  40                 if value < min:
  41                         min = value
  42                 if value > max:
  43                         max = value
  44                 avg = (avg + value) / 2
  45                 dict[key] = (min, max, avg, count + 1)
  46
  47 def clear_term():
  48     print("\x1b[H\x1b[2J")
  49
  50 audit_package_warned = False
  51
  52 try:
  53         import audit
  54         machine_to_id = {
  55                 'x86_64': audit.MACH_86_64,
  56                 'alpha' : audit.MACH_ALPHA,
  57                 'ia64'  : audit.MACH_IA64,
  58                 'ppc'   : audit.MACH_PPC,
  59                 'ppc64' : audit.MACH_PPC64,
  60                 's390'  : audit.MACH_S390,
  61                 's390x' : audit.MACH_S390X,
  62                 'i386'  : audit.MACH_X86,
  63                 'i586'  : audit.MACH_X86,
  64                 'i686'  : audit.MACH_X86,
  65         }
  66         try:
  67                 machine_to_id['armeb'] = audit.MACH_ARMEB
  68         except:
  69                 pass
  70         machine_id = machine_to_id[os.uname()[4]]
  71 except:
  72         if not audit_package_warned:
  73                 audit_package_warned = True
  74                 print "Install the audit-libs-python package to get syscall names"
  75
  76 def syscall_name(id):
  77         try:
  78                 return audit.audit_syscall_to_name(id, machine_id)
  79         except:
  80                 return str(id)
  81
  82 def strerror(nr):
  83         try:
  84                 return errno.errorcode[abs(nr)]
  85         except:
  86                 return "Unknown %d errno" % nr