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 from __future__ import print_function
   9
  10 import errno, os
  11
  12 FUTEX_WAIT = 0
  13 FUTEX_WAKE = 1
  14 FUTEX_PRIVATE_FLAG = 128
  15 FUTEX_CLOCK_REALTIME = 256
  16 FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
  17
  18 NSECS_PER_SEC    = 1000000000
  19
  20 def avg(total, n):
  21     return total / n
  22
  23 def nsecs(secs, nsecs):
  24     return secs * NSECS_PER_SEC + nsecs
  25
  26 def nsecs_secs(nsecs):
  27     return nsecs / NSECS_PER_SEC
  28
  29 def nsecs_nsecs(nsecs):
  30     return nsecs % NSECS_PER_SEC
  31
  32 def nsecs_str(nsecs):
  33     str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
  34     return str
  35
  36 def add_stats(dict, key, value):
  37         if key not in dict:
  38                 dict[key] = (value, value, value, 1)
  39         else:
  40                 min, max, avg, count = dict[key]
  41                 if value < min:
  42                         min = value
  43                 if value > max:
  44                         max = value
  45                 avg = (avg + value) / 2
  46                 dict[key] = (min, max, avg, count + 1)
  47
  48 def clear_term():
  49     print("\x1b[H\x1b[2J")
  50
  51 audit_package_warned = False
  52
  53 try:
  54         import audit
  55         machine_to_id = {
  56                 'x86_64': audit.MACH_86_64,
  57                 'alpha' : audit.MACH_ALPHA,
  58                 'ia64'  : audit.MACH_IA64,
  59                 'ppc'   : audit.MACH_PPC,
  60                 'ppc64' : audit.MACH_PPC64,
  61                 'ppc64le' : audit.MACH_PPC64LE,
  62                 's390'  : audit.MACH_S390,
  63                 's390x' : audit.MACH_S390X,
  64                 'i386'  : audit.MACH_X86,
  65                 'i586'  : audit.MACH_X86,
  66                 'i686'  : audit.MACH_X86,
  67         }
  68         try:
  69                 machine_to_id['armeb'] = audit.MACH_ARMEB
  70         except:
  71                 pass
  72         machine_id = machine_to_id[os.uname()[4]]
  73 except:
  74         if not audit_package_warned:
  75                 audit_package_warned = True
  76                 print("Install the audit-libs-python package to get syscall names.\n"
  77                     "For example:\n  # apt-get install python-audit (Ubuntu)"
  78                     "\n  # yum install audit-libs-python (Fedora)"
  79                     "\n  etc.\n")
  80
  81 def syscall_name(id):
  82         try:
  83                 return audit.audit_syscall_to_name(id, machine_id)
  84         except:
  85                 return str(id)
  86
  87 def strerror(nr):
  88         try:
  89                 return errno.errorcode[abs(nr)]
  90         except:
  91                 return "Unknown %d errno" % nr