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
 13from __future__ import print_function
 14
 15import os
 16import sys
 17import struct
 18
 19sys.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
 26def trace_begin():
 27	print("Intel PT Power Events and PTWRITE")
 28
 29def trace_end():
 30	print("End")
 31
 32def 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
 35def 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
 42def 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
 49def 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
 56def 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
 65def 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
 71def 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
 80def 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
 89def print_common_ip(sample, symbol, dso):
 90	ip = sample["ip"]
 91	print("%16x %s (%s)" % (ip, symbol, dso))
 92
 93def 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)