1 # Util.py - Python extension for perf script, miscellaneous utility code 2 # 3 # Copyright (C) 2010 by Tom Zanussi <tzanussi (at] 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 87
