# Util.py - Python extension for perf script, miscellaneous utility code## Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>## This software may be distributed under the terms of the GNU General# Public License ("GPL") version 2 as published by the Free Software# Foundation.from __future__ import print_function import errno, os FUTEX_WAIT = 0FUTEX_WAKE = 1FUTEX_PRIVATE_FLAG = 128FUTEX_CLOCK_REALTIME = 256FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME) NSECS_PER_SEC    = 1000000000 def avg(total, n):    return total / n def nsecs(secs, nsecs):    return secs * NSECS_PER_SEC + nsecs def nsecs_secs(nsecs):    return nsecs / NSECS_PER_SEC def nsecs_nsecs(nsecs):    return nsecs % NSECS_PER_SEC def nsecs_str(nsecs):    str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),    return str def add_stats(dict, key, value):	if key not in dict:		dict[key] = (value, value, value, 1)	else:		min, max, avg, count = dict[key]		if value < min:			min = value		if value > max:			max = value		avg = (avg + value) / 2		dict[key] = (min, max, avg, count + 1) def clear_term():    print("\x1b[H\x1b[2J") audit_package_warned = False try:	import audit	machine_to_id = {		'x86_64': audit.MACH_86_64,		'aarch64': audit.MACH_AARCH64,		'alpha'	: audit.MACH_ALPHA,		'ia64'	: audit.MACH_IA64,		'ppc'	: audit.MACH_PPC,		'ppc64'	: audit.MACH_PPC64,		'ppc64le' : audit.MACH_PPC64LE,		's390'	: audit.MACH_S390,		's390x'	: audit.MACH_S390X,		'i386'	: audit.MACH_X86,		'i586'	: audit.MACH_X86,		'i686'	: audit.MACH_X86,	}	try:		machine_to_id['armeb'] = audit.MACH_ARMEB	except:		pass	machine_id = machine_to_id[os.uname()[4]]except:	if not audit_package_warned:		audit_package_warned = True		print("Install the python-audit package to get syscall names.\n"                    "For example:\n  # apt-get install python3-audit (Ubuntu)"                    "\n  # yum install python3-audit (Fedora)"                    "\n  etc.\n") def syscall_name(id):	try:		return audit.audit_syscall_to_name(id, machine_id)	except:		return str(id) def strerror(nr):	try:		return errno.errorcode[abs(nr)]	except:		return "Unknown %d errno" % nr