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cc892720d8
Add script intel-pt-events.py that provides an example of how to unpack the raw data for power events and PTWRITE. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-35-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
129 lines
3.9 KiB
Python
129 lines
3.9 KiB
Python
# intel-pt-events.py: Print Intel PT Power Events and PTWRITE
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# Copyright (c) 2017, Intel Corporation.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms and conditions of the GNU General Public License,
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# version 2, as published by the Free Software Foundation.
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#
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# This program is distributed in the hope it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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import os
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import sys
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import struct
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sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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# These perf imports are not used at present
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#from perf_trace_context import *
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#from Core import *
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def trace_begin():
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print "Intel PT Power Events and PTWRITE"
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def trace_end():
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print "End"
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def trace_unhandled(event_name, context, event_fields_dict):
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print ' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())])
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def print_ptwrite(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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flags = data[0]
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payload = data[1]
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exact_ip = flags & 1
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print "IP: %u payload: %#x" % (exact_ip, payload),
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def print_cbr(raw_buf):
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data = struct.unpack_from("<BBBBII", raw_buf)
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cbr = data[0]
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f = (data[4] + 500) / 1000
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p = ((cbr * 1000 / data[2]) + 5) / 10
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print "%3u freq: %4u MHz (%3u%%)" % (cbr, f, p),
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def print_mwait(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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hints = payload & 0xff
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extensions = (payload >> 32) & 0x3
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print "hints: %#x extensions: %#x" % (hints, extensions),
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def print_pwre(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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hw = (payload >> 7) & 1
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cstate = (payload >> 12) & 0xf
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subcstate = (payload >> 8) & 0xf
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print "hw: %u cstate: %u sub-cstate: %u" % (hw, cstate, subcstate),
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def print_exstop(raw_buf):
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data = struct.unpack_from("<I", raw_buf)
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flags = data[0]
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exact_ip = flags & 1
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print "IP: %u" % (exact_ip),
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def print_pwrx(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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deepest_cstate = payload & 0xf
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last_cstate = (payload >> 4) & 0xf
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wake_reason = (payload >> 8) & 0xf
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print "deepest cstate: %u last cstate: %u wake reason: %#x" % (deepest_cstate, last_cstate, wake_reason),
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def print_common_start(comm, sample, name):
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ts = sample["time"]
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cpu = sample["cpu"]
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pid = sample["pid"]
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tid = sample["tid"]
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print "%16s %5u/%-5u [%03u] %9u.%09u %7s:" % (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000, name),
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def print_common_ip(sample, symbol, dso):
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ip = sample["ip"]
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print "%16x %s (%s)" % (ip, symbol, dso)
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def process_event(param_dict):
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event_attr = param_dict["attr"]
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sample = param_dict["sample"]
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raw_buf = param_dict["raw_buf"]
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comm = param_dict["comm"]
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name = param_dict["ev_name"]
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# Symbol and dso info are not always resolved
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if (param_dict.has_key("dso")):
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dso = param_dict["dso"]
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else:
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dso = "[unknown]"
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if (param_dict.has_key("symbol")):
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symbol = param_dict["symbol"]
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else:
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symbol = "[unknown]"
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if name == "ptwrite":
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print_common_start(comm, sample, name)
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print_ptwrite(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "cbr":
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print_common_start(comm, sample, name)
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print_cbr(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "mwait":
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print_common_start(comm, sample, name)
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print_mwait(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "pwre":
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print_common_start(comm, sample, name)
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print_pwre(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "exstop":
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print_common_start(comm, sample, name)
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print_exstop(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "pwrx":
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print_common_start(comm, sample, name)
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print_pwrx(raw_buf)
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print_common_ip(sample, symbol, dso)
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