tools/perf/scripts/python/intel-pt-events.py

   1 # intel-pt-events.py: Print Intel PT Power Events and PTWRITE
   2 # Copyright (c) 2017, Intel Corporation.
   3 #
   4 # This program is free software; you can redistribute it and/or modify it
   5 # under the terms and conditions of the GNU General Public License,
   6 # version 2, as published by the Free Software Foundation.
   7 #
   8 # This program is distributed in the hope it will be useful, but WITHOUT
   9 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11 # more details.
  12
  13 from __future__ import print_function
  14
  15 import os
  16 import sys
  17 import struct
  18
  19 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
  20         '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
  21
  22 # These perf imports are not used at present
  23 #from perf_trace_context import *
  24 #from Core import *
  25
  26 def trace_begin():
  27         print("Intel PT Power Events and PTWRITE")
  28
  29 def trace_end():
  30         print("End")
  31
  32 def trace_unhandled(event_name, context, event_fields_dict):
  33                 print(' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())]))
  34
  35 def print_ptwrite(raw_buf):
  36         data = struct.unpack_from("<IQ", raw_buf)
  37         flags = data[0]
  38         payload = data[1]
  39         exact_ip = flags & 1
  40         print("IP: %u payload: %#x" % (exact_ip, payload), end=' ')
  41
  42 def print_cbr(raw_buf):
  43         data = struct.unpack_from("<BBBBII", raw_buf)
  44         cbr = data[0]
  45         f = (data[4] + 500) / 1000
  46         p = ((cbr * 1000 / data[2]) + 5) / 10
  47         print("%3u  freq: %4u MHz  (%3u%%)" % (cbr, f, p), end=' ')
  48
  49 def print_mwait(raw_buf):
  50         data = struct.unpack_from("<IQ", raw_buf)
  51         payload = data[1]
  52         hints = payload & 0xff
  53         extensions = (payload >> 32) & 0x3
  54         print("hints: %#x extensions: %#x" % (hints, extensions), end=' ')
  55
  56 def print_pwre(raw_buf):
  57         data = struct.unpack_from("<IQ", raw_buf)
  58         payload = data[1]
  59         hw = (payload >> 7) & 1
  60         cstate = (payload >> 12) & 0xf
  61         subcstate = (payload >> 8) & 0xf
  62         print("hw: %u cstate: %u sub-cstate: %u" % (hw, cstate, subcstate),
  63                 end=' ')
  64
  65 def print_exstop(raw_buf):
  66         data = struct.unpack_from("<I", raw_buf)
  67         flags = data[0]
  68         exact_ip = flags & 1
  69         print("IP: %u" % (exact_ip), end=' ')
  70
  71 def print_pwrx(raw_buf):
  72         data = struct.unpack_from("<IQ", raw_buf)
  73         payload = data[1]
  74         deepest_cstate = payload & 0xf
  75         last_cstate = (payload >> 4) & 0xf
  76         wake_reason = (payload >> 8) & 0xf
  77         print("deepest cstate: %u last cstate: %u wake reason: %#x" %
  78                 (deepest_cstate, last_cstate, wake_reason), end=' ')
  79
  80 def print_common_start(comm, sample, name):
  81         ts = sample["time"]
  82         cpu = sample["cpu"]
  83         pid = sample["pid"]
  84         tid = sample["tid"]
  85         print("%16s %5u/%-5u [%03u] %9u.%09u %7s:" %
  86                 (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000, name),
  87                 end=' ')
  88
  89 def print_common_ip(sample, symbol, dso):
  90         ip = sample["ip"]
  91         print("%16x %s (%s)" % (ip, symbol, dso))
  92
  93 def process_event(param_dict):
  94         event_attr = param_dict["attr"]
  95         sample   = param_dict["sample"]
  96         raw_buf = param_dict["raw_buf"]
  97         comm       = param_dict["comm"]
  98         name       = param_dict["ev_name"]
  99
 100         # Symbol and dso info are not always resolved
 101         if "dso" in param_dict:
 102                 dso = param_dict["dso"]
 103         else:
 104                 dso = "[unknown]"
 105
 106         if "symbol" in param_dict:
 107                 symbol = param_dict["symbol"]
 108         else:
 109                 symbol = "[unknown]"
 110
 111         if name == "ptwrite":
 112                 print_common_start(comm, sample, name)
 113                 print_ptwrite(raw_buf)
 114                 print_common_ip(sample, symbol, dso)
 115         elif name == "cbr":
 116                 print_common_start(comm, sample, name)
 117                 print_cbr(raw_buf)
 118                 print_common_ip(sample, symbol, dso)
 119         elif name == "mwait":
 120                 print_common_start(comm, sample, name)
 121                 print_mwait(raw_buf)
 122                 print_common_ip(sample, symbol, dso)
 123         elif name == "pwre":
 124                 print_common_start(comm, sample, name)
 125                 print_pwre(raw_buf)
 126                 print_common_ip(sample, symbol, dso)
 127         elif name == "exstop":
 128                 print_common_start(comm, sample, name)
 129                 print_exstop(raw_buf)
 130                 print_common_ip(sample, symbol, dso)
 131         elif name == "pwrx":
 132                 print_common_start(comm, sample, name)
 133                 print_pwrx(raw_buf)
 134                 print_common_ip(sample, symbol, dso)