linux-kernel - [PATCH 21/25] perf scripts python: intel-pt-events.py: Add Event Trace

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Date:   Mon, 24 Jan 2022 10:41:57 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 21/25] perf scripts python: intel-pt-events.py: Add Event Trace

Add Event Trace to the intel-pt-events.py script. This shows how to unpack
the raw data from the new sample events in a Python script.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/scripts/python/intel-pt-events.py | 55 ++++++++++++++++++--
 1 file changed, 50 insertions(+), 5 deletions(-)

diff --git a/tools/perf/scripts/python/intel-pt-events.py b/tools/perf/scripts/python/intel-pt-events.py
index 66452a8ec358..973bd12b7b40 100644
--- a/tools/perf/scripts/python/intel-pt-events.py
+++ b/tools/perf/scripts/python/intel-pt-events.py
@@ -76,16 +76,16 @@ def trace_begin():
 	glb_args = ap.parse_args()
 	if glb_args.insn_trace:
 		print("Intel PT Instruction Trace")
-		itrace = "i0nsepwx"
+		itrace = "i0nsepwxI"
 		glb_insn = True
 	elif glb_args.src_trace:
 		print("Intel PT Source Trace")
-		itrace = "i0nsepwx"
+		itrace = "i0nsepwxI"
 		glb_insn = True
 		glb_src = True
 	else:
-		print("Intel PT Branch Trace, Power Events and PTWRITE")
-		itrace = "bepwx"
+		print("Intel PT Branch Trace, Power Events, Event Trace and PTWRITE")
+		itrace = "bepwxI"
 	global glb_disassembler
 	try:
 		glb_disassembler = LibXED()
@@ -149,6 +149,43 @@ def print_psb(raw_buf):
 	offset = data[1]
 	print("offset: %#x" % (offset), end=' ')
 
+glb_cfe = ["", "INTR", "IRET", "SMI", "RSM", "SIPI", "INIT", "VMENTRY", "VMEXIT",
+		"VMEXIT_INTR", "SHUTDOWN", "", "UINT", "UIRET"] + [""] * 18
+glb_evd = ["", "PFA", "VMXQ", "VMXR"] + [""] * 60
+
+def print_evt(raw_buf):
+	data = struct.unpack_from("<BBH", raw_buf)
+	typ = data[0] & 0x1f
+	ip_flag = (data[0] & 0x80) >> 7
+	vector = data[1]
+	evd_cnt = data[2]
+	s = glb_cfe[typ]
+	if s:
+		print(" cfe: %s IP: %u vector: %u" % (s, ip_flag, vector), end=' ')
+	else:
+		print(" cfe: %u IP: %u vector: %u" % (typ, ip_flag, vector), end=' ')
+	pos = 4
+	for i in range(evd_cnt):
+		data = struct.unpack_from("<QQ", raw_buf)
+		et = data[0] & 0x3f
+		s = glb_evd[et]
+		if s:
+			print("%s: %#x" % (s, data[1]), end=' ')
+		else:
+			print("EVD_%u: %#x" % (et, data[1]), end=' ')
+
+def print_iflag(raw_buf):
+	data = struct.unpack_from("<IQ", raw_buf)
+	iflag = data[0] & 1
+	old_iflag = iflag ^ 1
+	via_branch = data[0] & 2
+	branch_ip = data[1]
+	if via_branch:
+		s = "via"
+	else:
+		s = "non"
+	print("IFLAG: %u->%u %s branch" % (old_iflag, iflag, s), end=' ')
+
 def common_start_str(comm, sample):
 	ts = sample["time"]
 	cpu = sample["cpu"]
@@ -164,7 +201,7 @@ def print_common_start(comm, sample, name):
 	# weight      = sample["weight"]
 	# transaction = sample["transaction"]
 	# cpumode     = get_optional_zero(sample, "cpumode")
-	print(common_start_str(comm, sample) + "%7s  %19s" % (name, flags_disp), end=' ')
+	print(common_start_str(comm, sample) + "%8s  %21s" % (name, flags_disp), end=' ')
 
 def print_instructions_start(comm, sample):
 	if "x" in get_optional_null(sample, "flags"):
@@ -315,6 +352,14 @@ def do_process_event(param_dict):
 		print_common_start(comm, sample, name)
 		print_psb(raw_buf)
 		print_common_ip(param_dict, sample, symbol, dso)
+	elif name == "evt":
+		print_common_start(comm, sample, name)
+		print_evt(raw_buf)
+		print_common_ip(param_dict, sample, symbol, dso)
+	elif name == "iflag":
+		print_common_start(comm, sample, name)
+		print_iflag(raw_buf)
+		print_common_ip(param_dict, sample, symbol, dso)
 	else:
 		print_common_start(comm, sample, name)
 		print_common_ip(param_dict, sample, symbol, dso)
-- 
2.25.1