tools/perf/scripts/python/check-perf-trace.py

Source file repositories/reference/linux-study-clean/tools/perf/scripts/python/check-perf-trace.py

File Facts

System
Linux kernel
Corpus path
tools/perf/scripts/python/check-perf-trace.py
Extension
.py
Size
2461 bytes
Lines
85
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

# perf script event handlers, generated by perf script -g python
# (c) 2010, Tom Zanussi <tzanussi@gmail.com>
# Licensed under the terms of the GNU GPL License version 2
#
# This script tests basic functionality such as flag and symbol
# strings, common_xxx() calls back into perf, begin, end, unhandled
# events, etc.  Basically, if this script runs successfully and
# displays expected results, Python scripting support should be ok.

from __future__ import print_function

import os
import sys

sys.path.append(os.environ['PERF_EXEC_PATH'] + \
	'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')

from Core import *
from perf_trace_context import *

unhandled = autodict()

def trace_begin():
	print("trace_begin")
	pass

def trace_end():
	print_unhandled()

def irq__softirq_entry(event_name, context, common_cpu,
		       common_secs, common_nsecs, common_pid, common_comm,
		       common_callchain, vec):
	print_header(event_name, common_cpu, common_secs, common_nsecs,
		common_pid, common_comm)

	print_uncommon(context)

	print("vec=%s" % (symbol_str("irq__softirq_entry", "vec", vec)))

def kmem__kmalloc(event_name, context, common_cpu,
		  common_secs, common_nsecs, common_pid, common_comm,
		  common_callchain, call_site, ptr, bytes_req, bytes_alloc,
		  gfp_flags):
	print_header(event_name, common_cpu, common_secs, common_nsecs,
		common_pid, common_comm)

	print_uncommon(context)

	print("call_site=%u, ptr=%u, bytes_req=%u, "
		"bytes_alloc=%u, gfp_flags=%s" %
		(call_site, ptr, bytes_req, bytes_alloc,
		flag_str("kmem__kmalloc", "gfp_flags", gfp_flags)))

def trace_unhandled(event_name, context, event_fields_dict):
	try:
		unhandled[event_name] += 1
	except TypeError:
		unhandled[event_name] = 1

def print_header(event_name, cpu, secs, nsecs, pid, comm):
	print("%-20s %5u %05u.%09u %8u %-20s " %
		(event_name, cpu, secs, nsecs, pid, comm),
		end=' ')

# print trace fields not included in handler args
def print_uncommon(context):
	print("common_preempt_count=%d, common_flags=%s, "
		"common_lock_depth=%d, " %
		(common_pc(context), trace_flag_str(common_flags(context)),
		common_lock_depth(context)))

Annotation

Implementation Notes