# system call counts# (c) 2010, Tom Zanussi <tzanussi@gmail.com># Licensed under the terms of the GNU GPL License version 2## Displays system-wide system call totals, broken down by syscall.# If a [comm] arg is specified, only syscalls called by [comm] are displayed. from __future__ import print_function import osimport sys 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 syscall_name usage = "perf script -s syscall-counts.py [comm]\n"; for_comm = None if len(sys.argv) > 2:	sys.exit(usage) if len(sys.argv) > 1:	for_comm = sys.argv[1] syscalls = autodict() def trace_begin():	print("Press control+C to stop and show the summary") def trace_end():	print_syscall_totals() 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():	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):		print("%-40s  %10d" % (syscall_name(id), val))