tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py

Source file repositories/reference/linux-study-clean/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py

File Facts

System
Linux kernel
Corpus path
tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py
Extension
.py
Size
2208 bytes
Lines
93
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# 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 = 0
FUTEX_WAKE = 1
FUTEX_PRIVATE_FLAG = 128
FUTEX_CLOCK_REALTIME = 256
FUTEX_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

Annotation

Implementation Notes