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 'aarch64': audit.MACH_AARCH64, 58 'alpha' : audit.MACH_ALPHA, 59 'ia64' : audit.MACH_IA64, 60 'ppc' : audit.MACH_PPC, 61 'ppc64' : audit.MACH_PPC64, 62 'ppc64le' : audit.MACH_PPC64LE, 63 's390' : audit.MACH_S390, 64 's390x' : audit.MACH_S390X, 65 'i386' : audit.MACH_X86, 66 'i586' : audit.MACH_X86, 67 'i686' : audit.MACH_X86, 68 } 69 try: 70 machine_to_id['armeb'] = audit.MACH_ARMEB 71 except: 72 pass 73 machine_id = machine_to_id[os.uname()[4]] 74 except: 75 if not audit_package_warned: 76 audit_package_warned = True 77 print("Install the python-audit package to get syscall names.\n" 78 "For example:\n # apt-get install python3-audit (Ubuntu)" 79 "\n # yum install python3-audit (Fedora)" 80 "\n etc.\n") 81 82 def syscall_name(id): 83 try: 84 return audit.audit_syscall_to_name(id, machine_id) 85 except: 86 return str(id) 87 88 def strerror(nr): 89 try: 90 return errno.errorcode[abs(nr)] 91 except: 92 return "Unknown %d errno" % nr 93