1 # SPDX-License-Identifier: GPL-2.0 2 # intel-pt-events.py: Print Intel PT Events including Power Events and PTWRITE 3 # Copyright (c) 2017-2021, Intel Corporation. 4 # 5 # This program is free software; you can redistribute it and/or modify it 6 # under the terms and conditions of the GNU General Public License, 7 # version 2, as published by the Free Software Foundation. 8 # 9 # This program is distributed in the hope it will be useful, but WITHOUT 10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 # more details. 13 14 from __future__ import print_function 15 16 import os 17 import sys 18 import struct 19 import argparse 20 21 from libxed import LibXED 22 from ctypes import create_string_buffer, addressof 23 24 sys.path.append(os.environ['PERF_EXEC_PATH'] + \ 25 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace') 26 27 from perf_trace_context import perf_set_itrace_options, \ 28 perf_sample_insn, perf_sample_srccode 29 30 try: 31 broken_pipe_exception = BrokenPipeError 32 except: 33 broken_pipe_exception = IOError 34 35 glb_switch_str = {} 36 glb_insn = False 37 glb_disassembler = None 38 glb_src = False 39 glb_source_file_name = None 40 glb_line_number = None 41 glb_dso = None 42 43 def get_optional_null(perf_dict, field): 44 if field in perf_dict: 45 return perf_dict[field] 46 return "" 47 48 def get_optional_zero(perf_dict, field): 49 if field in perf_dict: 50 return perf_dict[field] 51 return 0 52 53 def get_optional_bytes(perf_dict, field): 54 if field in perf_dict: 55 return perf_dict[field] 56 return bytes() 57 58 def get_optional(perf_dict, field): 59 if field in perf_dict: 60 return perf_dict[field] 61 return "[unknown]" 62 63 def get_offset(perf_dict, field): 64 if field in perf_dict: 65 return "+%#x" % perf_dict[field] 66 return "" 67 68 def trace_begin(): 69 ap = argparse.ArgumentParser(usage = "", add_help = False) 70 ap.add_argument("--insn-trace", action='store_true') 71 ap.add_argument("--src-trace", action='store_true') 72 ap.add_argument("--all-switch-events", action='store_true') 73 global glb_args 74 global glb_insn 75 global glb_src 76 glb_args = ap.parse_args() 77 if glb_args.insn_trace: 78 print("Intel PT Instruction Trace") 79 itrace = "i0nsepwxI" 80 glb_insn = True 81 elif glb_args.src_trace: 82 print("Intel PT Source Trace") 83 itrace = "i0nsepwxI" 84 glb_insn = True 85 glb_src = True 86 else: 87 print("Intel PT Branch Trace, Power Events, Event Trace and PTWRITE") 88 itrace = "bepwxI" 89 global glb_disassembler 90 try: 91 glb_disassembler = LibXED() 92 except: 93 glb_disassembler = None 94 perf_set_itrace_options(perf_script_context, itrace) 95 96 def trace_end(): 97 print("End") 98 99 def trace_unhandled(event_name, context, event_fields_dict): 100 print(' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())])) 101 102 def print_ptwrite(raw_buf): 103 data = struct.unpack_from("<IQ", raw_buf) 104 flags = data[0] 105 payload = data[1] 106 exact_ip = flags & 1 107 print("IP: %u payload: %#x" % (exact_ip, payload), end=' ') 108 109 def print_cbr(raw_buf): 110 data = struct.unpack_from("<BBBBII", raw_buf) 111 cbr = data[0] 112 f = (data[4] + 500) / 1000 113 p = ((cbr * 1000 / data[2]) + 5) / 10 114 print("%3u freq: %4u MHz (%3u%%)" % (cbr, f, p), end=' ') 115 116 def print_mwait(raw_buf): 117 data = struct.unpack_from("<IQ", raw_buf) 118 payload = data[1] 119 hints = payload & 0xff 120 extensions = (payload >> 32) & 0x3 121 print("hints: %#x extensions: %#x" % (hints, extensions), end=' ') 122 123 def print_pwre(raw_buf): 124 data = struct.unpack_from("<IQ", raw_buf) 125 payload = data[1] 126 hw = (payload >> 7) & 1 127 cstate = (payload >> 12) & 0xf 128 subcstate = (payload >> 8) & 0xf 129 print("hw: %u cstate: %u sub-cstate: %u" % (hw, cstate, subcstate), 130 end=' ') 131 132 def print_exstop(raw_buf): 133 data = struct.unpack_from("<I", raw_buf) 134 flags = data[0] 135 exact_ip = flags & 1 136 print("IP: %u" % (exact_ip), end=' ') 137 138 def print_pwrx(raw_buf): 139 data = struct.unpack_from("<IQ", raw_buf) 140 payload = data[1] 141 deepest_cstate = payload & 0xf 142 last_cstate = (payload >> 4) & 0xf 143 wake_reason = (payload >> 8) & 0xf 144 print("deepest cstate: %u last cstate: %u wake reason: %#x" % 145 (deepest_cstate, last_cstate, wake_reason), end=' ') 146 147 def print_psb(raw_buf): 148 data = struct.unpack_from("<IQ", raw_buf) 149 offset = data[1] 150 print("offset: %#x" % (offset), end=' ') 151 152 glb_cfe = ["", "INTR", "IRET", "SMI", "RSM", "SIPI", "INIT", "VMENTRY", "VMEXIT", 153 "VMEXIT_INTR", "SHUTDOWN", "", "UINT", "UIRET"] + [""] * 18 154 glb_evd = ["", "PFA", "VMXQ", "VMXR"] + [""] * 60 155 156 def print_evt(raw_buf): 157 data = struct.unpack_from("<BBH", raw_buf) 158 typ = data[0] & 0x1f 159 ip_flag = (data[0] & 0x80) >> 7 160 vector = data[1] 161 evd_cnt = data[2] 162 s = glb_cfe[typ] 163 if s: 164 print(" cfe: %s IP: %u vector: %u" % (s, ip_flag, vector), end=' ') 165 else: 166 print(" cfe: %u IP: %u vector: %u" % (typ, ip_flag, vector), end=' ') 167 pos = 4 168 for i in range(evd_cnt): 169 data = struct.unpack_from("<QQ", raw_buf) 170 et = data[0] & 0x3f 171 s = glb_evd[et] 172 if s: 173 print("%s: %#x" % (s, data[1]), end=' ') 174 else: 175 print("EVD_%u: %#x" % (et, data[1]), end=' ') 176 177 def print_iflag(raw_buf): 178 data = struct.unpack_from("<IQ", raw_buf) 179 iflag = data[0] & 1 180 old_iflag = iflag ^ 1 181 via_branch = data[0] & 2 182 branch_ip = data[1] 183 if via_branch: 184 s = "via" 185 else: 186 s = "non" 187 print("IFLAG: %u->%u %s branch" % (old_iflag, iflag, s), end=' ') 188 189 def common_start_str(comm, sample): 190 ts = sample["time"] 191 cpu = sample["cpu"] 192 pid = sample["pid"] 193 tid = sample["tid"] 194 return "%16s %5u/%-5u [%03u] %9u.%09u " % (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000) 195 196 def print_common_start(comm, sample, name): 197 flags_disp = get_optional_null(sample, "flags_disp") 198 # Unused fields: 199 # period = sample["period"] 200 # phys_addr = sample["phys_addr"] 201 # weight = sample["weight"] 202 # transaction = sample["transaction"] 203 # cpumode = get_optional_zero(sample, "cpumode") 204 print(common_start_str(comm, sample) + "%8s %21s" % (name, flags_disp), end=' ') 205 206 def print_instructions_start(comm, sample): 207 if "x" in get_optional_null(sample, "flags"): 208 print(common_start_str(comm, sample) + "x", end=' ') 209 else: 210 print(common_start_str(comm, sample), end=' ') 211 212 def disassem(insn, ip): 213 inst = glb_disassembler.Instruction() 214 glb_disassembler.SetMode(inst, 0) # Assume 64-bit 215 buf = create_string_buffer(64) 216 buf.value = insn 217 return glb_disassembler.DisassembleOne(inst, addressof(buf), len(insn), ip) 218 219 def print_common_ip(param_dict, sample, symbol, dso): 220 ip = sample["ip"] 221 offs = get_offset(param_dict, "symoff") 222 if "cyc_cnt" in sample: 223 cyc_cnt = sample["cyc_cnt"] 224 insn_cnt = get_optional_zero(sample, "insn_cnt") 225 ipc_str = " IPC: %#.2f (%u/%u)" % (insn_cnt / cyc_cnt, insn_cnt, cyc_cnt) 226 else: 227 ipc_str = "" 228 if glb_insn and glb_disassembler is not None: 229 insn = perf_sample_insn(perf_script_context) 230 if insn and len(insn): 231 cnt, text = disassem(insn, ip) 232 byte_str = ("%x" % ip).rjust(16) 233 if sys.version_info.major >= 3: 234 for k in range(cnt): 235 byte_str += " %02x" % insn[k] 236 else: 237 for k in xrange(cnt): 238 byte_str += " %02x" % ord(insn[k]) 239 print("%-40s %-30s" % (byte_str, text), end=' ') 240 print("%s%s (%s)" % (symbol, offs, dso), end=' ') 241 else: 242 print("%16x %s%s (%s)" % (ip, symbol, offs, dso), end=' ') 243 if "addr_correlates_sym" in sample: 244 addr = sample["addr"] 245 dso = get_optional(sample, "addr_dso") 246 symbol = get_optional(sample, "addr_symbol") 247 offs = get_offset(sample, "addr_symoff") 248 print("=> %x %s%s (%s)%s" % (addr, symbol, offs, dso, ipc_str)) 249 else: 250 print(ipc_str) 251 252 def print_srccode(comm, param_dict, sample, symbol, dso, with_insn): 253 ip = sample["ip"] 254 if symbol == "[unknown]": 255 start_str = common_start_str(comm, sample) + ("%x" % ip).rjust(16).ljust(40) 256 else: 257 offs = get_offset(param_dict, "symoff") 258 start_str = common_start_str(comm, sample) + (symbol + offs).ljust(40) 259 260 if with_insn and glb_insn and glb_disassembler is not None: 261 insn = perf_sample_insn(perf_script_context) 262 if insn and len(insn): 263 cnt, text = disassem(insn, ip) 264 start_str += text.ljust(30) 265 266 global glb_source_file_name 267 global glb_line_number 268 global glb_dso 269 270 source_file_name, line_number, source_line = perf_sample_srccode(perf_script_context) 271 if source_file_name: 272 if glb_line_number == line_number and glb_source_file_name == source_file_name: 273 src_str = "" 274 else: 275 if len(source_file_name) > 40: 276 src_file = ("..." + source_file_name[-37:]) + " " 277 else: 278 src_file = source_file_name.ljust(41) 279 if source_line is None: 280 src_str = src_file + str(line_number).rjust(4) + " <source not found>" 281 else: 282 src_str = src_file + str(line_number).rjust(4) + " " + source_line 283 glb_dso = None 284 elif dso == glb_dso: 285 src_str = "" 286 else: 287 src_str = dso 288 glb_dso = dso 289 290 glb_line_number = line_number 291 glb_source_file_name = source_file_name 292 293 print(start_str, src_str) 294 295 def do_process_event(param_dict): 296 event_attr = param_dict["attr"] 297 sample = param_dict["sample"] 298 raw_buf = param_dict["raw_buf"] 299 comm = param_dict["comm"] 300 name = param_dict["ev_name"] 301 # Unused fields: 302 # callchain = param_dict["callchain"] 303 # brstack = param_dict["brstack"] 304 # brstacksym = param_dict["brstacksym"] 305 306 # Symbol and dso info are not always resolved 307 dso = get_optional(param_dict, "dso") 308 symbol = get_optional(param_dict, "symbol") 309 310 cpu = sample["cpu"] 311 if cpu in glb_switch_str: 312 print(glb_switch_str[cpu]) 313 del glb_switch_str[cpu] 314 315 if name[0:12] == "instructions": 316 if glb_src: 317 print_srccode(comm, param_dict, sample, symbol, dso, True) 318 else: 319 print_instructions_start(comm, sample) 320 print_common_ip(param_dict, sample, symbol, dso) 321 elif name[0:8] == "branches": 322 if glb_src: 323 print_srccode(comm, param_dict, sample, symbol, dso, False) 324 else: 325 print_common_start(comm, sample, name) 326 print_common_ip(param_dict, sample, symbol, dso) 327 elif name == "ptwrite": 328 print_common_start(comm, sample, name) 329 print_ptwrite(raw_buf) 330 print_common_ip(param_dict, sample, symbol, dso) 331 elif name == "cbr": 332 print_common_start(comm, sample, name) 333 print_cbr(raw_buf) 334 print_common_ip(param_dict, sample, symbol, dso) 335 elif name == "mwait": 336 print_common_start(comm, sample, name) 337 print_mwait(raw_buf) 338 print_common_ip(param_dict, sample, symbol, dso) 339 elif name == "pwre": 340 print_common_start(comm, sample, name) 341 print_pwre(raw_buf) 342 print_common_ip(param_dict, sample, symbol, dso) 343 elif name == "exstop": 344 print_common_start(comm, sample, name) 345 print_exstop(raw_buf) 346 print_common_ip(param_dict, sample, symbol, dso) 347 elif name == "pwrx": 348 print_common_start(comm, sample, name) 349 print_pwrx(raw_buf) 350 print_common_ip(param_dict, sample, symbol, dso) 351 elif name == "psb": 352 print_common_start(comm, sample, name) 353 print_psb(raw_buf) 354 print_common_ip(param_dict, sample, symbol, dso) 355 elif name == "evt": 356 print_common_start(comm, sample, name) 357 print_evt(raw_buf) 358 print_common_ip(param_dict, sample, symbol, dso) 359 elif name == "iflag": 360 print_common_start(comm, sample, name) 361 print_iflag(raw_buf) 362 print_common_ip(param_dict, sample, symbol, dso) 363 else: 364 print_common_start(comm, sample, name) 365 print_common_ip(param_dict, sample, symbol, dso) 366 367 def process_event(param_dict): 368 try: 369 do_process_event(param_dict) 370 except broken_pipe_exception: 371 # Stop python printing broken pipe errors and traceback 372 sys.stdout = open(os.devnull, 'w') 373 sys.exit(1) 374 375 def auxtrace_error(typ, code, cpu, pid, tid, ip, ts, msg, cpumode, *x): 376 try: 377 print("%16s %5u/%-5u [%03u] %9u.%09u error type %u code %u: %s ip 0x%16x" % 378 ("Trace error", pid, tid, cpu, ts / 1000000000, ts %1000000000, typ, code, msg, ip)) 379 except broken_pipe_exception: 380 # Stop python printing broken pipe errors and traceback 381 sys.stdout = open(os.devnull, 'w') 382 sys.exit(1) 383 384 def context_switch(ts, cpu, pid, tid, np_pid, np_tid, machine_pid, out, out_preempt, *x): 385 if out: 386 out_str = "Switch out " 387 else: 388 out_str = "Switch In " 389 if out_preempt: 390 preempt_str = "preempt" 391 else: 392 preempt_str = "" 393 if machine_pid == -1: 394 machine_str = "" 395 else: 396 machine_str = "machine PID %d" % machine_pid 397 switch_str = "%16s %5d/%-5d [%03u] %9u.%09u %5d/%-5d %s %s" % \ 398 (out_str, pid, tid, cpu, ts / 1000000000, ts %1000000000, np_pid, np_tid, machine_str, preempt_str) 399 if glb_args.all_switch_events: 400 print(switch_str); 401 else: 402 global glb_switch_str 403 glb_switch_str[cpu] = switch_str 404