scripts/python/check-perf-trace.py

0001 # perf script event handlers, generated by perf script -g python
0002 # (c) 2010, Tom Zanussi <tzanussi@gmail.com>
0003 # Licensed under the terms of the GNU GPL License version 2
0004 #
0005 # This script tests basic functionality such as flag and symbol
0006 # strings, common_xxx() calls back into perf, begin, end, unhandled
0007 # events, etc.  Basically, if this script runs successfully and
0008 # displays expected results, Python scripting support should be ok.
0009
0010 from __future__ import print_function
0011
0012 import os
0013 import sys
0014
0015 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
0016     '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
0017
0018 from Core import *
0019 from perf_trace_context import *
0020
0021 unhandled = autodict()
0022
0023 def trace_begin():
0024     print("trace_begin")
0025     pass
0026
0027 def trace_end():
0028     print_unhandled()
0029
0030 def irq__softirq_entry(event_name, context, common_cpu,
0031                common_secs, common_nsecs, common_pid, common_comm,
0032                common_callchain, vec):
0033     print_header(event_name, common_cpu, common_secs, common_nsecs,
0034         common_pid, common_comm)
0035
0036     print_uncommon(context)
0037
0038     print("vec=%s" % (symbol_str("irq__softirq_entry", "vec", vec)))
0039
0040 def kmem__kmalloc(event_name, context, common_cpu,
0041           common_secs, common_nsecs, common_pid, common_comm,
0042           common_callchain, call_site, ptr, bytes_req, bytes_alloc,
0043           gfp_flags):
0044     print_header(event_name, common_cpu, common_secs, common_nsecs,
0045         common_pid, common_comm)
0046
0047     print_uncommon(context)
0048
0049     print("call_site=%u, ptr=%u, bytes_req=%u, "
0050         "bytes_alloc=%u, gfp_flags=%s" %
0051         (call_site, ptr, bytes_req, bytes_alloc,
0052         flag_str("kmem__kmalloc", "gfp_flags", gfp_flags)))
0053
0054 def trace_unhandled(event_name, context, event_fields_dict):
0055     try:
0056         unhandled[event_name] += 1
0057     except TypeError:
0058         unhandled[event_name] = 1
0059
0060 def print_header(event_name, cpu, secs, nsecs, pid, comm):
0061     print("%-20s %5u %05u.%09u %8u %-20s " %
0062         (event_name, cpu, secs, nsecs, pid, comm),
0063         end=' ')
0064
0065 # print trace fields not included in handler args
0066 def print_uncommon(context):
0067     print("common_preempt_count=%d, common_flags=%s, "
0068         "common_lock_depth=%d, " %
0069         (common_pc(context), trace_flag_str(common_flags(context)),
0070         common_lock_depth(context)))
0071
0072 def print_unhandled():
0073     keys = unhandled.keys()
0074     if not keys:
0075         return
0076
0077     print("\nunhandled events:\n")
0078
0079     print("%-40s  %10s" % ("event", "count"))
0080     print("%-40s  %10s" % ("----------------------------------------",
0081                 "-----------"))
0082
0083     for event_name in keys:
0084         print("%-40s  %10d\n" % (event_name, unhandled[event_name]))