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perf scripting python: intel-pt-events.py: Add --insn-trace and --src-trace 

Add an instruction trace and a source trace to the intel-pt-events.py
script.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210530192308.7382-14-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-05-30 22:23:08 +03:00 committed by Arnaldo Carvalho de Melo
parent 2b87386c7a
commit a483e64c0b
2 changed files with 163 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/Documentation/perf-intel-pt.txt
View File

@ -174,7 +174,11 @@ Refer to script export-to-sqlite.py or export-to-postgresql.py for more details,
and to script exported-sql-viewer.py for an example of using the database.
There is also script intel-pt-events.py which provides an example of how to
unpack the raw data for power events and PTWRITE.
unpack the raw data for power events and PTWRITE. The script also displays
branches, and supports 2 additional modes selected by option:
--insn-trace - instruction trace
--src-trace - source trace
As mentioned above, it is easy to capture too much data. One way to limit the
data captured is to use 'snapshot' mode which is explained further below.

176
tools/perf/scripts/python/intel-pt-events.py
View File

@ -16,21 +16,30 @@ from __future__ import print_function
import os
import sys
import struct
import argparse
from libxed import LibXED
from ctypes import create_string_buffer, addressof
sys.path.append(os.environ['PERF_EXEC_PATH'] + \
'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
# These perf imports are not used at present
#from perf_trace_context import *
#from Core import *
from perf_trace_context import perf_set_itrace_options, \
perf_sample_insn, perf_sample_srccode
try:
broken_pipe_exception = BrokenPipeError
except:
broken_pipe_exception = IOError
glb_switch_str = None
glb_switch_printed = True
glb_switch_str = None
glb_switch_printed = True
glb_insn = False
glb_disassembler = None
glb_src = False
glb_source_file_name = None
glb_line_number = None
glb_dso = None
def get_optional_null(perf_dict, field):
if field in perf_dict:
@ -42,6 +51,11 @@ def get_optional_zero(perf_dict, field):
return perf_dict[field]
return 0
def get_optional_bytes(perf_dict, field):
if field in perf_dict:
return perf_dict[field]
return bytes()
def get_optional(perf_dict, field):
if field in perf_dict:
return perf_dict[field]
@ -53,7 +67,31 @@ def get_offset(perf_dict, field):
return ""
def trace_begin():
print("Intel PT Branch Trace, Power Events and PTWRITE")
ap = argparse.ArgumentParser(usage = "", add_help = False)
ap.add_argument("--insn-trace", action='store_true')
ap.add_argument("--src-trace", action='store_true')
global glb_args
global glb_insn
global glb_src
glb_args = ap.parse_args()
if glb_args.insn_trace:
print("Intel PT Instruction Trace")
itrace = "i0nsepwx"
glb_insn = True
elif glb_args.src_trace:
print("Intel PT Source Trace")
itrace = "i0nsepwx"
glb_insn = True
glb_src = True
else:
print("Intel PT Branch Trace, Power Events and PTWRITE")
itrace = "bepwx"
global glb_disassembler
try:
glb_disassembler = LibXED()
except:
glb_disassembler = None
perf_set_itrace_options(perf_script_context, itrace)
def trace_end():
print("End")
@ -111,11 +149,14 @@ def print_psb(raw_buf):
offset = data[1]
print("offset: %#x" % (offset), end=' ')
def print_common_start(comm, sample, name):
def common_start_str(comm, sample):
ts = sample["time"]
cpu = sample["cpu"]
pid = sample["pid"]
tid = sample["tid"]
return "%16s %5u/%-5u [%03u] %9u.%09u " % (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000)
def print_common_start(comm, sample, name):
flags_disp = get_optional_null(sample, "flags_disp")
# Unused fields:
# period = sample["period"]
@ -123,22 +164,96 @@ def print_common_start(comm, sample, name):
# weight = sample["weight"]
# transaction = sample["transaction"]
# cpumode = get_optional_zero(sample, "cpumode")
print("%16s %5u/%-5u [%03u] %9u.%09u %7s %19s" %
(comm, pid, tid, cpu, ts / 1000000000, ts %1000000000, name, flags_disp),
end=' ')
print(common_start_str(comm, sample) + "%7s %19s" % (name, flags_disp), end=' ')
def print_instructions_start(comm, sample):
if "x" in get_optional_null(sample, "flags"):
print(common_start_str(comm, sample) + "x", end=' ')
else:
print(common_start_str(comm, sample), end=' ')
def disassem(insn, ip):
inst = glb_disassembler.Instruction()
glb_disassembler.SetMode(inst, 0) # Assume 64-bit
buf = create_string_buffer(64)
buf.value = insn
return glb_disassembler.DisassembleOne(inst, addressof(buf), len(insn), ip)
def print_common_ip(param_dict, sample, symbol, dso):
ip = sample["ip"]
offs = get_offset(param_dict, "symoff")
print("%16x %s%s (%s)" % (ip, symbol, offs, dso), end=' ')
if "cyc_cnt" in sample:
cyc_cnt = sample["cyc_cnt"]
insn_cnt = get_optional_zero(sample, "insn_cnt")
ipc_str = " IPC: %#.2f (%u/%u)" % (insn_cnt / cyc_cnt, insn_cnt, cyc_cnt)
else:
ipc_str = ""
if glb_insn and glb_disassembler is not None:
insn = perf_sample_insn(perf_script_context)
if insn and len(insn):
cnt, text = disassem(insn, ip)
byte_str = ("%x" % ip).rjust(16)
if sys.version_info.major >= 3:
for k in range(cnt):
byte_str += " %02x" % insn[k]
else:
for k in xrange(cnt):
byte_str += " %02x" % ord(insn[k])
print("%-40s %-30s" % (byte_str, text), end=' ')
print("%s%s (%s)" % (symbol, offs, dso), end=' ')
else:
print("%16x %s%s (%s)" % (ip, symbol, offs, dso), end=' ')
if "addr_correlates_sym" in sample:
addr = sample["addr"]
dso = get_optional(sample, "addr_dso")
symbol = get_optional(sample, "addr_symbol")
offs = get_offset(sample, "addr_symoff")
print("=> %x %s%s (%s)" % (addr, symbol, offs, dso))
print("=> %x %s%s (%s)%s" % (addr, symbol, offs, dso, ipc_str))
else:
print()
print(ipc_str)
def print_srccode(comm, param_dict, sample, symbol, dso, with_insn):
ip = sample["ip"]
if symbol == "[unknown]":
start_str = common_start_str(comm, sample) + ("%x" % ip).rjust(16).ljust(40)
else:
offs = get_offset(param_dict, "symoff")
start_str = common_start_str(comm, sample) + (symbol + offs).ljust(40)
if with_insn and glb_insn and glb_disassembler is not None:
insn = perf_sample_insn(perf_script_context)
if insn and len(insn):
cnt, text = disassem(insn, ip)
start_str += text.ljust(30)
global glb_source_file_name
global glb_line_number
global glb_dso
source_file_name, line_number, source_line = perf_sample_srccode(perf_script_context)
if source_file_name:
if glb_line_number == line_number and glb_source_file_name == source_file_name:
src_str = ""
else:
if len(source_file_name) > 40:
src_file = ("..." + source_file_name[-37:]) + " "
else:
src_file = source_file_name.ljust(41)
if source_line is None:
src_str = src_file + str(line_number).rjust(4) + " <source not found>"
else:
src_str = src_file + str(line_number).rjust(4) + " " + source_line
glb_dso = None
elif dso == glb_dso:
src_str = ""
else:
src_str = dso
glb_dso = dso
glb_line_number = line_number
glb_source_file_name = source_file_name
print(start_str, src_str)
def do_process_event(param_dict):
global glb_switch_printed
@ -159,24 +274,49 @@ def do_process_event(param_dict):
dso = get_optional(param_dict, "dso")
symbol = get_optional(param_dict, "symbol")
print_common_start(comm, sample, name)
if name == "ptwrite":
if name[0:12] == "instructions":
if glb_src:
print_srccode(comm, param_dict, sample, symbol, dso, True)
else:
print_instructions_start(comm, sample)
print_common_ip(param_dict, sample, symbol, dso)
elif name[0:8] == "branches":
if glb_src:
print_srccode(comm, param_dict, sample, symbol, dso, False)
else:
print_common_start(comm, sample, name)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "ptwrite":
print_common_start(comm, sample, name)
print_ptwrite(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "cbr":
print_common_start(comm, sample, name)
print_cbr(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "mwait":
print_common_start(comm, sample, name)
print_mwait(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "pwre":
print_common_start(comm, sample, name)
print_pwre(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "exstop":
print_common_start(comm, sample, name)
print_exstop(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "pwrx":
print_common_start(comm, sample, name)
print_pwrx(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
elif name == "psb":
print_common_start(comm, sample, name)
print_psb(raw_buf)
print_common_ip(param_dict, sample, symbol, dso)
print_common_ip(param_dict, sample, symbol, dso)
else:
print_common_start(comm, sample, name)
print_common_ip(param_dict, sample, symbol, dso)
def process_event(param_dict):
try: