# system call top# (c) 2010, Tom Zanussi <tzanussi@gmail.com># Licensed under the terms of the GNU GPL License version 2## Periodically displays system-wide system call totals, broken down by# syscall.  If a [comm] arg is specified, only syscalls called by# [comm] are displayed. If an [interval] arg is specified, the display# will be refreshed every [interval] seconds.  The default interval is# 3 seconds. from __future__ import print_function import os, sys, time try:	import threadexcept ImportError:	import _thread as thread sys.path.append(os.environ['PERF_EXEC_PATH'] + \	'/scripts/python/Perf-Trace-Util/lib/Perf/Trace') from perf_trace_context import *from Core import *from Util import * usage = "perf script -s sctop.py [comm] [interval]\n"; for_comm = Nonedefault_interval = 3interval = default_interval if len(sys.argv) > 3:	sys.exit(usage) if len(sys.argv) > 2:	for_comm = sys.argv[1]	interval = int(sys.argv[2])elif len(sys.argv) > 1:	try:		interval = int(sys.argv[1])	except ValueError:		for_comm = sys.argv[1]		interval = default_interval syscalls = autodict() def trace_begin():	thread.start_new_thread(print_syscall_totals, (interval,))	pass def raw_syscalls__sys_enter(event_name, context, common_cpu,	common_secs, common_nsecs, common_pid, common_comm,	common_callchain, id, args):	if for_comm is not None:		if common_comm != for_comm:			return	try:		syscalls[id] += 1	except TypeError:		syscalls[id] = 1 def syscalls__sys_enter(event_name, context, common_cpu,	common_secs, common_nsecs, common_pid, common_comm,	id, args):	raw_syscalls__sys_enter(**locals()) def print_syscall_totals(interval):	while 1:		clear_term()		if for_comm is not None:			print("\nsyscall events for %s:\n" % (for_comm))		else:			print("\nsyscall events:\n") 		print("%-40s  %10s" % ("event", "count"))		print("%-40s  %10s" %			("----------------------------------------",			"----------")) 		for id, val in sorted(syscalls.items(),				key = lambda kv: (kv[1], kv[0]),				reverse = True):			try:				print("%-40s  %10d" % (syscall_name(id), val))			except TypeError:				pass		syscalls.clear()		time.sleep(interval)