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perf intel-pt: Add example script for power events and PTWRITE

Add script intel-pt-events.py that provides an example of how to unpack the raw data for power events and PTWRITE.

Adrian Hunter committed 9 years ago

Commit cc892721 parent 37973073 files · +144 −0Browse files

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3 files
  1. tools/perf/scripts/python/bin/intel-pt-events-record +13 −0
  2. tools/perf/scripts/python/bin/intel-pt-events-report +3 −0
  3. tools/perf/scripts/python/intel-pt-events.py +128 −0
tools/perf/scripts/python/bin/intel-pt-events-record+13−0
@@ -0,0 +1,13 @@
1+#!/bin/bash
2+
3+#
4+# print Intel PT Power Events and PTWRITE. The intel_pt PMU event needs
5+# to be specified with appropriate config terms.
6+#
7+if ! echo "$@" | grep -q intel_pt ; then
8+ echo "Options must include the Intel PT event e.g. -e intel_pt/pwr_evt,ptw/"
9+ echo "and for power events it probably needs to be system wide i.e. -a option"
10+ echo "For example: -a -e intel_pt/pwr_evt,branch=0/ sleep 1"
11+ exit 1
12+fi
13+perf record $@
tools/perf/scripts/python/bin/intel-pt-events-report+3−0
@@ -0,0 +1,3 @@
1+#!/bin/bash
2+# description: print Intel PT Power Events and PTWRITE
3+perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/intel-pt-events.py
tools/perf/scripts/python/intel-pt-events.py+128−0
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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+
13+import os
14+import sys
15+import struct
16+
17+sys.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+
24+def trace_begin():
25+ print "Intel PT Power Events and PTWRITE"
26+
27+def trace_end():
28+ print "End"
29+
30+def 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+
33+def 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+
40+def 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+
47+def 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+
54+def 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+
62+def 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+
68+def 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+
76+def 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+
83+def print_common_ip(sample, symbol, dso):
84+ ip = sample["ip"]
85+ print "%16x %s (%s)" % (ip, symbol, dso)
86+
87+def 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)