sctop.py

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# 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.

import os, sys, thread, time

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 = None
default_interval = 3
interval = 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\n" % (for_comm),
        else:
            print "\nsyscall events:\n\n",

        print "%-40s  %10s\n" % ("event", "count"),
        print "%-40s  %10s\n" % ("----------------------------------------", \
                         "----------"),

        for id, val in sorted(syscalls.iteritems(), key = lambda(k, v): (v, k), \
                          reverse = True):
            try:
                print "%-40s  %10d\n" % (syscall_name(id), val),
            except TypeError:
                pass
        syscalls.clear()
        time.sleep(interval)