projects/linux·blob b9231dfb · 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
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)