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   1 # perf trace event handlers, generated by perf trace -g python
   2 # (c) 2010, Tom Zanussi <tzanussi@gmail.com>
   3 # Licensed under the terms of the GNU GPL License version 2
   4 #
   5 # This script tests basic functionality such as flag and symbol
   6 # strings, common_xxx() calls back into perf, begin, end, unhandled
   7 # events, etc.  Basically, if this script runs successfully and
   8 # displays expected results, Python scripting support should be ok.
   9
  10 import os
  11 import sys
  12
  13 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
  14         '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
  15
  16 from Core import *
  17 from perf_trace_context import *
  18
  19 unhandled = autodict()
  20
  21 def trace_begin():
  22         print "trace_begin"
  23         pass
  24
  25 def trace_end():
  26         print_unhandled()
  27
  28 def irq__softirq_entry(event_name, context, common_cpu,
  29         common_secs, common_nsecs, common_pid, common_comm,
  30         vec):
  31                 print_header(event_name, common_cpu, common_secs, common_nsecs,
  32                         common_pid, common_comm)
  33
  34                 print_uncommon(context)
  35
  36                 print "vec=%s\n" % \
  37                 (symbol_str("irq__softirq_entry", "vec", vec)),
  38
  39 def kmem__kmalloc(event_name, context, common_cpu,
  40         common_secs, common_nsecs, common_pid, common_comm,
  41         call_site, ptr, bytes_req, bytes_alloc,
  42         gfp_flags):
  43                 print_header(event_name, common_cpu, common_secs, common_nsecs,
  44                         common_pid, common_comm)
  45
  46                 print_uncommon(context)
  47
  48                 print "call_site=%u, ptr=%u, bytes_req=%u, " \
  49                 "bytes_alloc=%u, gfp_flags=%s\n" % \
  50                 (call_site, ptr, bytes_req, bytes_alloc,
  51
  52                 flag_str("kmem__kmalloc", "gfp_flags", gfp_flags)),
  53
  54 def trace_unhandled(event_name, context, event_fields_dict):
  55     try:
  56         unhandled[event_name] += 1
  57     except TypeError:
  58         unhandled[event_name] = 1
  59
  60 def print_header(event_name, cpu, secs, nsecs, pid, comm):
  61         print "%-20s %5u %05u.%09u %8u %-20s " % \
  62         (event_name, cpu, secs, nsecs, pid, comm),
  63
  64 # print trace fields not included in handler args
  65 def print_uncommon(context):
  66     print "common_preempt_count=%d, common_flags=%s, common_lock_depth=%d, " \
  67         % (common_pc(context), trace_flag_str(common_flags(context)), \
  68                common_lock_depth(context))
  69
  70 def print_unhandled():
  71     keys = unhandled.keys()
  72     if not keys:
  73         return
  74
  75     print "\nunhandled events:\n\n",
  76
  77     print "%-40s  %10s\n" % ("event", "count"),
  78     print "%-40s  %10s\n" % ("----------------------------------------", \
  79                                  "-----------"),
  80
  81     for event_name in keys:
  82         print "%-40s  %10d\n" % (event_name, unhandled[event_name])