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

   1 # Util.py - Python extension for perf trace, 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 NSECS_PER_SEC    = 1000000000
  12
  13 def avg(total, n):
  14     return total / n
  15
  16 def nsecs(secs, nsecs):
  17     return secs * NSECS_PER_SEC + nsecs
  18
  19 def nsecs_secs(nsecs):
  20     return nsecs / NSECS_PER_SEC
  21
  22 def nsecs_nsecs(nsecs):
  23     return nsecs % NSECS_PER_SEC
  24
  25 def nsecs_str(nsecs):
  26     str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
  27     return str
  28
  29 def clear_term():
  30     print("\x1b[H\x1b[2J")
  31
  32 audit_package_warned = False
  33
  34 try:
  35         import audit
  36         machine_to_id = {
  37                 'x86_64': audit.MACH_86_64,
  38                 'alpha' : audit.MACH_ALPHA,
  39                 'ia64'  : audit.MACH_IA64,
  40                 'ppc'   : audit.MACH_PPC,
  41                 'ppc64' : audit.MACH_PPC64,
  42                 's390'  : audit.MACH_S390,
  43                 's390x' : audit.MACH_S390X,
  44                 'i386'  : audit.MACH_X86,
  45                 'i586'  : audit.MACH_X86,
  46                 'i686'  : audit.MACH_X86,
  47         }
  48         try:
  49                 machine_to_id['armeb'] = audit.MACH_ARMEB
  50         except:
  51                 pass
  52         machine_id = machine_to_id[os.uname()[4]]
  53 except:
  54         if not audit_package_warned:
  55                 audit_package_warned = True
  56                 print "Install the audit-libs-python package to get syscall names"
  57
  58 def syscall_name(id):
  59         try:
  60                 return audit.audit_syscall_to_name(id, machine_id)
  61         except:
  62                 return str(id)
  63
  64 def strerror(nr):
  65         try:
  66                 return errno.errorcode[abs(nr)]
  67         except:
  68                 return "Unknown %d errno" % nr