scripts/python/sctop.py

0001 # system call top
0002 # (c) 2010, Tom Zanussi <tzanussi@gmail.com>
0003 # Licensed under the terms of the GNU GPL License version 2
0004 #
0005 # Periodically displays system-wide system call totals, broken down by
0006 # syscall.  If a [comm] arg is specified, only syscalls called by
0007 # [comm] are displayed. If an [interval] arg is specified, the display
0008 # will be refreshed every [interval] seconds.  The default interval is
0009 # 3 seconds.
0010
0011 from __future__ import print_function
0012
0013 import os, sys, time
0014
0015 try:
0016     import thread
0017 except ImportError:
0018     import _thread as thread
0019
0020 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
0021     '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
0022
0023 from perf_trace_context import *
0024 from Core import *
0025 from Util import *
0026
0027 usage = "perf script -s sctop.py [comm] [interval]\n";
0028
0029 for_comm = None
0030 default_interval = 3
0031 interval = default_interval
0032
0033 if len(sys.argv) > 3:
0034     sys.exit(usage)
0035
0036 if len(sys.argv) > 2:
0037     for_comm = sys.argv[1]
0038     interval = int(sys.argv[2])
0039 elif len(sys.argv) > 1:
0040     try:
0041         interval = int(sys.argv[1])
0042     except ValueError:
0043         for_comm = sys.argv[1]
0044         interval = default_interval
0045
0046 syscalls = autodict()
0047
0048 def trace_begin():
0049     thread.start_new_thread(print_syscall_totals, (interval,))
0050     pass
0051
0052 def raw_syscalls__sys_enter(event_name, context, common_cpu,
0053     common_secs, common_nsecs, common_pid, common_comm,
0054     common_callchain, id, args):
0055     if for_comm is not None:
0056         if common_comm != for_comm:
0057             return
0058     try:
0059         syscalls[id] += 1
0060     except TypeError:
0061         syscalls[id] = 1
0062
0063 def syscalls__sys_enter(event_name, context, common_cpu,
0064     common_secs, common_nsecs, common_pid, common_comm,
0065     id, args):
0066     raw_syscalls__sys_enter(**locals())
0067
0068 def print_syscall_totals(interval):
0069     while 1:
0070         clear_term()
0071         if for_comm is not None:
0072             print("\nsyscall events for %s:\n" % (for_comm))
0073         else:
0074             print("\nsyscall events:\n")
0075
0076         print("%-40s  %10s" % ("event", "count"))
0077         print("%-40s  %10s" %
0078             ("----------------------------------------",
0079             "----------"))
0080
0081         for id, val in sorted(syscalls.items(),
0082                 key = lambda kv: (kv[1], kv[0]),
0083                 reverse = True):
0084             try:
0085                 print("%-40s  %10d" % (syscall_name(id), val))
0086             except TypeError:
0087                 pass
0088         syscalls.clear()
0089         time.sleep(interval)