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. 8from __future__ import print_function 9 10import errno, os 11 12FUTEX_WAIT = 0 13FUTEX_WAKE = 1 14FUTEX_PRIVATE_FLAG = 128 15FUTEX_CLOCK_REALTIME = 256 16FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME) 17 18NSECS_PER_SEC = 1000000000 19 20def avg(total, n): 21 return total / n 22 23def nsecs(secs, nsecs): 24 return secs * NSECS_PER_SEC + nsecs 25 26def nsecs_secs(nsecs): 27 return nsecs / NSECS_PER_SEC 28 29def nsecs_nsecs(nsecs): 30 return nsecs % NSECS_PER_SEC 31 32def nsecs_str(nsecs): 33 str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)), 34 return str 35 36def 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 48def clear_term(): 49 print("\x1b[H\x1b[2J") 50 51audit_package_warned = False 52 53try: 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]] 73except: 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 81def syscall_name(id): 82 try: 83 return audit.audit_syscall_to_name(id, machine_id) 84 except: 85 return str(id) 86 87def strerror(nr): 88 try: 89 return errno.errorcode[abs(nr)] 90 except: 91 return "Unknown %d errno" % nr 92