93 lines · python
1# Util.py - Python extension for perf script, miscellaneous utility code2#3# Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>4#5# This software may be distributed under the terms of the GNU General6# Public License ("GPL") version 2 as published by the Free Software7# Foundation.8from __future__ import print_function9 10import errno, os11 12FUTEX_WAIT = 013FUTEX_WAKE = 114FUTEX_PRIVATE_FLAG = 12815FUTEX_CLOCK_REALTIME = 25616FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)17 18NSECS_PER_SEC = 100000000019 20def avg(total, n):21 return total / n22 23def nsecs(secs, nsecs):24 return secs * NSECS_PER_SEC + nsecs25 26def nsecs_secs(nsecs):27 return nsecs / NSECS_PER_SEC28 29def nsecs_nsecs(nsecs):30 return nsecs % NSECS_PER_SEC31 32def nsecs_str(nsecs):33 str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),34 return str35 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 = value43 if value > max:44 max = value45 avg = (avg + value) / 246 dict[key] = (min, max, avg, count + 1)47 48def clear_term():49 print("\x1b[H\x1b[2J")50 51audit_package_warned = False52 53try:54 import audit55 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_ARMEB71 except:72 pass73 machine_id = machine_to_id[os.uname()[4]]74except:75 if not audit_package_warned:76 audit_package_warned = True77 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 82def syscall_name(id):83 try:84 return audit.audit_syscall_to_name(id, machine_id)85 except:86 return str(id)87 88def strerror(nr):89 try:90 return errno.errorcode[abs(nr)]91 except:92 return "Unknown %d errno" % nr93