projects/linux·blob 0d55ec6f · refs

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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
13import os
14import sys
15import struct
16
17sys.path.append(os.environ['PERF_EXEC_PATH'] + \
18 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
19
20# These perf imports are not used at present
21#from perf_trace_context import *
22#from Core import *
23
24def trace_begin():
25 print "Intel PT Power Events and PTWRITE"
26
27def trace_end():
28 print "End"
29
30def trace_unhandled(event_name, context, event_fields_dict):
31 print ' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())])
32
33def print_ptwrite(raw_buf):
34 data = struct.unpack_from("<IQ", raw_buf)
35 flags = data[0]
36 payload = data[1]
37 exact_ip = flags & 1
38 print "IP: %u payload: %#x" % (exact_ip, payload),
39
40def print_cbr(raw_buf):
41 data = struct.unpack_from("<BBBBII", raw_buf)
42 cbr = data[0]
43 f = (data[4] + 500) / 1000
44 p = ((cbr * 1000 / data[2]) + 5) / 10
45 print "%3u freq: %4u MHz (%3u%%)" % (cbr, f, p),
46
47def print_mwait(raw_buf):
48 data = struct.unpack_from("<IQ", raw_buf)
49 payload = data[1]
50 hints = payload & 0xff
51 extensions = (payload >> 32) & 0x3
52 print "hints: %#x extensions: %#x" % (hints, extensions),
53
54def print_pwre(raw_buf):
55 data = struct.unpack_from("<IQ", raw_buf)
56 payload = data[1]
57 hw = (payload >> 7) & 1
58 cstate = (payload >> 12) & 0xf
59 subcstate = (payload >> 8) & 0xf
60 print "hw: %u cstate: %u sub-cstate: %u" % (hw, cstate, subcstate),
61
62def print_exstop(raw_buf):
63 data = struct.unpack_from("<I", raw_buf)
64 flags = data[0]
65 exact_ip = flags & 1
66 print "IP: %u" % (exact_ip),
67
68def print_pwrx(raw_buf):
69 data = struct.unpack_from("<IQ", raw_buf)
70 payload = data[1]
71 deepest_cstate = payload & 0xf
72 last_cstate = (payload >> 4) & 0xf
73 wake_reason = (payload >> 8) & 0xf
74 print "deepest cstate: %u last cstate: %u wake reason: %#x" % (deepest_cstate, last_cstate, wake_reason),
75
76def print_common_start(comm, sample, name):
77 ts = sample["time"]
78 cpu = sample["cpu"]
79 pid = sample["pid"]
80 tid = sample["tid"]
81 print "%16s %5u/%-5u [%03u] %9u.%09u %7s:" % (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000, name),
82
83def print_common_ip(sample, symbol, dso):
84 ip = sample["ip"]
85 print "%16x %s (%s)" % (ip, symbol, dso)
86
87def process_event(param_dict):
88 event_attr = param_dict["attr"]
89 sample = param_dict["sample"]
90 raw_buf = param_dict["raw_buf"]
91 comm = param_dict["comm"]
92 name = param_dict["ev_name"]
93
94 # Symbol and dso info are not always resolved
95 if (param_dict.has_key("dso")):
96 dso = param_dict["dso"]
97 else:
98 dso = "[unknown]"
99
100 if (param_dict.has_key("symbol")):
101 symbol = param_dict["symbol"]
102 else:
103 symbol = "[unknown]"
104
105 if name == "ptwrite":
106 print_common_start(comm, sample, name)
107 print_ptwrite(raw_buf)
108 print_common_ip(sample, symbol, dso)
109 elif name == "cbr":
110 print_common_start(comm, sample, name)
111 print_cbr(raw_buf)
112 print_common_ip(sample, symbol, dso)
113 elif name == "mwait":
114 print_common_start(comm, sample, name)
115 print_mwait(raw_buf)
116 print_common_ip(sample, symbol, dso)
117 elif name == "pwre":
118 print_common_start(comm, sample, name)
119 print_pwre(raw_buf)
120 print_common_ip(sample, symbol, dso)
121 elif name == "exstop":
122 print_common_start(comm, sample, name)
123 print_exstop(raw_buf)
124 print_common_ip(sample, symbol, dso)
125 elif name == "pwrx":
126 print_common_start(comm, sample, name)
127 print_pwrx(raw_buf)
128 print_common_ip(sample, symbol, dso)