opcontrol.cpp revision 87866d93bd7de46ffe9333437e5230c6eda58448
1/* 2 * Copyright 2008, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/* 18 * Binary implementation of the original opcontrol script due to missing tools 19 * like awk, test, etc. 20 */ 21 22#include <unistd.h> 23#include <getopt.h> 24#include <stdio.h> 25#include <stdlib.h> 26#include <string.h> 27#include <errno.h> 28#include <fcntl.h> 29#include <signal.h> 30#include <dirent.h> 31#include <sys/stat.h> 32#include <sys/types.h> 33#include <sys/wait.h> 34 35#include "op_config.h" 36 37#define verbose(fmt...) if (verbose_print) printf(fmt) 38 39/* Experiments found that using a small interval may hang the device, and the 40 * more events tracked simultaneously, the longer the interval has to be. 41 */ 42 43#if defined(__i386__) || defined(__x86_64__) 44#define MAX_EVENTS 2 45int min_count[MAX_EVENTS] = {60000, 100000}; 46#elif !defined(WITH_ARM_V7_A) 47#define MAX_EVENTS 3 48int min_count[MAX_EVENTS] = {150000, 200000, 250000}; 49#else 50#define MAX_EVENTS 5 51int min_count[MAX_EVENTS] = {150000, 20000, 25000, 30000, 35000}; 52#endif 53 54int verbose_print; 55int list_events; 56int show_usage; 57int setup; 58int quick; 59int timer; 60int num_events; 61int start; 62int stop; 63int reset; 64 65int selected_events[MAX_EVENTS]; 66int selected_counts[MAX_EVENTS]; 67 68char callgraph[8]; 69char kernel_range[512]; 70char vmlinux[512]; 71 72struct option long_options[] = { 73 {"help", 0, &show_usage, 1}, 74 {"list-events", 0, &list_events, 1}, 75 {"reset", 0, &reset, 1}, 76 {"setup", 0, &setup, 1}, 77 {"quick", 0, &quick, 1}, 78 {"timer", 0, &timer, 1}, 79 {"callgraph", 1, 0, 'c'}, 80 {"event", 1, 0, 'e'}, 81 {"vmlinux", 1, 0, 'v'}, 82 {"kernel-range", 1, 0, 'r'}, 83 {"start", 0, &start, 1}, 84 {"stop", 0, &stop, 1}, 85 {"dump", 0, 0, 'd'}, 86 {"shutdown", 0, 0, 'h'}, 87 {"status", 0, 0, 't'}, 88 {"verbose", 0, 0, 'V'}, 89 {"verbose-log", 1, 0, 'l'}, 90 {0, 0, 0, 0}, 91}; 92 93struct event_info { 94 int id; 95 int um; 96 const char *name; 97 const char *explanation; 98} event_info[] = { 99#if defined(__i386__) || defined(__x86_64__) 100 /* INTEL_ARCH_PERFMON events */ 101 102 /* 0x3c counters:cpuid um:zero minimum:6000 filter:0 name:CPU_CLK_UNHALTED : 103 * Clock cycles when not halted 104 */ 105 {0x3c, 0, "CPU_CLK_UNHALTED", 106 "Clock cycles when not halted" }, 107 108 /* event:0x3c counters:cpuid um:one minimum:6000 filter:2 name:UNHALTED_REFERENCE_CYCLES : 109 * Unhalted reference cycles 110 */ 111 {0x3c, 1, "UNHALTED_REFERENCE_CYCLES", 112 "Unhalted reference cycles" }, 113 114 /* event:0xc0 counters:cpuid um:zero minimum:6000 filter:1 name:INST_RETIRED : 115 * number of instructions retired 116 */ 117 {0xc0, 0, "INST_RETIRED", 118 "number of instructions retired"}, 119 120 /* event:0x2e counters:cpuid um:x41 minimum:6000 filter:5 name:LLC_MISSES : 121 * Last level cache demand requests from this core that missed the LLC 122 */ 123 {0x2e, 0x41, "LLC_MISSES", 124 "Last level cache demand requests from this core that missed the LLC"}, 125 126 /* event:0x2e counters:cpuid um:x4f minimum:6000 filter:4 name:LLC_REFS : 127 * Last level cache demand requests from this core 128 */ 129 {0x2e, 0x4f, "LLC_REFS", 130 "Last level cache demand requests from this core"}, 131 132 /* event:0xc4 counters:cpuid um:zero minimum:500 filter:6 name:BR_INST_RETIRED : 133 * number of branch instructions retired 134 */ 135 {0xc4, 0, "BR_INST_RETIRED", 136 "number of branch instructions retired"}, 137 138 /* event:0xc5 counters:cpuid um:zero minimum:500 filter:7 name:BR_MISS_PRED_RETIRED : 139 * number of mispredicted branches retired (precise) 140 */ 141 {0xc5, 0, "BR_MISS_PRED_RETIRED", 142 "number of mispredicted branches retired (precise)"}, 143 144#elif !defined(WITH_ARM_V7_A) 145 /* ARM V6 events */ 146 {0x00, 0, "IFU_IFETCH_MISS", 147 "number of instruction fetch misses"}, 148 {0x01, 0, "CYCLES_IFU_MEM_STALL", 149 "cycles instruction fetch pipe is stalled"}, 150 {0x02, 0, "CYCLES_DATA_STALL", 151 "cycles stall occurs for due to data dependency"}, 152 {0x03, 0, "ITLB_MISS", 153 "number of Instruction MicroTLB misses"}, 154 {0x04, 0, "DTLB_MISS", 155 "number of Data MicroTLB misses"}, 156 {0x05, 0, "BR_INST_EXECUTED", 157 "branch instruction executed w/ or w/o program flow change"}, 158 {0x06, 0, "BR_INST_MISS_PRED", 159 "branch mispredicted"}, 160 {0x07, 0, "INSN_EXECUTED", 161 "instructions executed"}, 162 {0x09, 0, "DCACHE_ACCESS", 163 "data cache access, cacheable locations"}, 164 {0x0a, 0, "DCACHE_ACCESS_ALL", 165 "data cache access, all locations"}, 166 {0x0b, 0, "DCACHE_MISS", 167 "data cache miss"}, 168 {0x0c, 0, "DCACHE_WB", 169 "data cache writeback, 1 event for every half cacheline"}, 170 {0x0d, 0, "PC_CHANGE", 171 "number of times the program counter was changed without a mode switch"}, 172 {0x0f, 0, "TLB_MISS", 173 "Main TLB miss"}, 174 {0x10, 0, "EXP_EXTERNAL", 175 "Explicit external data access"}, 176 {0x11, 0, "LSU_STALL", 177 "cycles stalled because Load Store request queue is full"}, 178 {0x12, 0, "WRITE_DRAIN", 179 "Times write buffer was drained"}, 180 {0xff, 0, "CPU_CYCLES", 181 "clock cycles counter"}, 182#else 183 /* ARM V7 events */ 184 {0x00, 0, "PMNC_SW_INCR", 185 "Software increment of PMNC registers"}, 186 {0x01, 0, "IFETCH_MISS", 187 "Instruction fetch misses from cache or normal cacheable memory"}, 188 {0x02, 0, "ITLB_MISS", 189 "Instruction fetch misses from TLB"}, 190 {0x03, 0, "DCACHE_REFILL", 191 "Data R/W operation that causes a refill from cache or normal cacheable" 192 "memory"}, 193 {0x04, 0, "DCACHE_ACCESS", 194 "Data R/W from cache"}, 195 {0x05, 0, "DTLB_REFILL", 196 "Data R/W that causes a TLB refill"}, 197 {0x06, 0, "DREAD", 198 "Data read architecturally executed (note: architecturally executed = for" 199 "instructions that are unconditional or that pass the condition code)"}, 200 {0x07, 0, "DWRITE", 201 "Data write architecturally executed"}, 202 {0x08, 0, "INSTR_EXECUTED", 203 "All executed instructions"}, 204 {0x09, 0, "EXC_TAKEN", 205 "Exception taken"}, 206 {0x0A, 0, "EXC_EXECUTED", 207 "Exception return architecturally executed"}, 208 {0x0B, 0, "CID_WRITE", 209 "Instruction that writes to the Context ID Register architecturally" 210 "executed"}, 211 {0x0C, 0, "PC_WRITE", 212 "SW change of PC, architecturally executed (not by exceptions)"}, 213 {0x0D, 0, "PC_IMM_BRANCH", 214 "Immediate branch instruction executed (taken or not)"}, 215 {0x0E, 0, "PC_PROC_RETURN", 216 "Procedure return architecturally executed (not by exceptions)"}, 217 {0x0F, 0, "UNALIGNED_ACCESS", 218 "Unaligned access architecturally executed"}, 219 {0x10, 0, "PC_BRANCH_MIS_PRED", 220 "Branch mispredicted or not predicted. Counts pipeline flushes because of" 221 "misprediction"}, 222 {0x12, 0, "PC_BRANCH_MIS_USED", 223 "Branch or change in program flow that could have been predicted"}, 224 {0x40, 0, "WRITE_BUFFER_FULL", 225 "Any write buffer full cycle"}, 226 {0x41, 0, "L2_STORE_MERGED", 227 "Any store that is merged in L2 cache"}, 228 {0x42, 0, "L2_STORE_BUFF", 229 "Any bufferable store from load/store to L2 cache"}, 230 {0x43, 0, "L2_ACCESS", 231 "Any access to L2 cache"}, 232 {0x44, 0, "L2_CACH_MISS", 233 "Any cacheable miss in L2 cache"}, 234 {0x45, 0, "AXI_READ_CYCLES", 235 "Number of cycles for an active AXI read"}, 236 {0x46, 0, "AXI_WRITE_CYCLES", 237 "Number of cycles for an active AXI write"}, 238 {0x47, 0, "MEMORY_REPLAY", 239 "Any replay event in the memory subsystem"}, 240 {0x48, 0, "UNALIGNED_ACCESS_REPLAY", 241 "Unaligned access that causes a replay"}, 242 {0x49, 0, "L1_DATA_MISS", 243 "L1 data cache miss as a result of the hashing algorithm"}, 244 {0x4A, 0, "L1_INST_MISS", 245 "L1 instruction cache miss as a result of the hashing algorithm"}, 246 {0x4B, 0, "L1_DATA_COLORING", 247 "L1 data access in which a page coloring alias occurs"}, 248 {0x4C, 0, "L1_NEON_DATA", 249 "NEON data access that hits L1 cache"}, 250 {0x4D, 0, "L1_NEON_CACH_DATA", 251 "NEON cacheable data access that hits L1 cache"}, 252 {0x4E, 0, "L2_NEON", 253 "L2 access as a result of NEON memory access"}, 254 {0x4F, 0, "L2_NEON_HIT", 255 "Any NEON hit in L2 cache"}, 256 {0x50, 0, "L1_INST", 257 "Any L1 instruction cache access, excluding CP15 cache accesses"}, 258 {0x51, 0, "PC_RETURN_MIS_PRED", 259 "Return stack misprediction at return stack pop" 260 "(incorrect target address)"}, 261 {0x52, 0, "PC_BRANCH_FAILED", 262 "Branch prediction misprediction"}, 263 {0x53, 0, "PC_BRANCH_TAKEN", 264 "Any predicted branch that is taken"}, 265 {0x54, 0, "PC_BRANCH_EXECUTED", 266 "Any taken branch that is executed"}, 267 {0x55, 0, "OP_EXECUTED", 268 "Number of operations executed" 269 "(in instruction or mutli-cycle instruction)"}, 270 {0x56, 0, "CYCLES_INST_STALL", 271 "Cycles where no instruction available"}, 272 {0x57, 0, "CYCLES_INST", 273 "Number of instructions issued in a cycle"}, 274 {0x58, 0, "CYCLES_NEON_DATA_STALL", 275 "Number of cycles the processor waits on MRC data from NEON"}, 276 {0x59, 0, "CYCLES_NEON_INST_STALL", 277 "Number of cycles the processor waits on NEON instruction queue or" 278 "NEON load queue"}, 279 {0x5A, 0, "NEON_CYCLES", 280 "Number of cycles NEON and integer processors are not idle"}, 281 {0x70, 0, "PMU0_EVENTS", 282 "Number of events from external input source PMUEXTIN[0]"}, 283 {0x71, 0, "PMU1_EVENTS", 284 "Number of events from external input source PMUEXTIN[1]"}, 285 {0x72, 0, "PMU_EVENTS", 286 "Number of events from both external input sources PMUEXTIN[0]" 287 "and PMUEXTIN[1]"}, 288 {0xFF, 0, "CPU_CYCLES", 289 "Number of CPU cycles"}, 290#endif 291}; 292 293void usage() 294{ 295 printf("\nopcontrol: usage:\n" 296 " --list-events list event types\n" 297 " --help this message\n" 298 " --verbose show extra status\n" 299 " --verbose-log=lvl set daemon logging verbosity during setup\n" 300 " levels are: all,sfile,arcs,samples,module,misc\n" 301 " --setup setup directories\n" 302#if defined(__i386__) || defined(__x86_64__) 303 " --quick setup and select CPU_CLK_UNHALTED:60000\n" 304#else 305 " --quick setup and select CPU_CYCLES:150000\n" 306#endif 307 " --timer timer-based profiling\n" 308 " --status show configuration\n" 309 " --start start data collection\n" 310 " --stop stop data collection\n" 311 " --reset clears out data from current session\n" 312 " --shutdown kill the oprofile daeman\n" 313 " --callgraph=depth callgraph depth\n" 314 " --event=eventspec\n" 315 " Choose an event. May be specified multiple times.\n" 316 " eventspec is in the form of name[:count], where :\n" 317 " name: event name, see \"opcontrol --list-events\"\n" 318 " count: reset counter value\n" 319 " --vmlinux=file vmlinux kernel image\n" 320 " --kernel-range=start,end\n" 321 " kernel range vma address in hexadecimal\n" 322 ); 323} 324 325void setup_session_dir() 326{ 327 int fd; 328 329 fd = open(OP_DATA_DIR, O_RDONLY); 330 if (fd != -1) { 331 system("rm -r "OP_DATA_DIR); 332 close(fd); 333 } 334 335 if (mkdir(OP_DATA_DIR, 0755)) { 336 fprintf(stderr, "Cannot create directory \"%s\": %s\n", 337 OP_DATA_DIR, strerror(errno)); 338 } 339 if (mkdir(OP_DATA_DIR"/samples", 0755)) { 340 fprintf(stderr, "Cannot create directory \"%s\": %s\n", 341 OP_DATA_DIR"/samples", strerror(errno)); 342 } 343} 344 345int do_setup() 346{ 347 char dir[1024]; 348 349 setup_session_dir(); 350 351 if (mkdir(OP_DRIVER_BASE, 0755)) { 352 if (errno != EEXIST) { 353 fprintf(stderr, "Cannot create directory "OP_DRIVER_BASE": %s\n", 354 strerror(errno)); 355 return -1; 356 } 357 } 358 359 if (access(OP_DRIVER_BASE"/stats", F_OK)) { 360 if (system("mount -t oprofilefs nodev "OP_DRIVER_BASE)) { 361 return -1; 362 } 363 } 364 return 0; 365} 366 367void do_list_events() 368{ 369 unsigned int i; 370 371 printf("%-20s: %s\n", "name", "meaning"); 372 printf("----------------------------------------" 373 "--------------------------------------\n"); 374 for (i = 0; i < sizeof(event_info)/sizeof(struct event_info); i++) { 375 printf("%-20s: %s\n", event_info[i].name, event_info[i].explanation); 376 } 377} 378 379int find_event_idx_from_name(const char *name) 380{ 381 unsigned int i; 382 383 for (i = 0; i < sizeof(event_info)/sizeof(struct event_info); i++) { 384 if (!strcmp(name, event_info[i].name)) { 385 return i; 386 } 387 } 388 return -1; 389} 390 391const char * find_event_name_from_id(int id) 392{ 393 unsigned int i; 394 395 for (i = 0; i < sizeof(event_info)/sizeof(struct event_info); i++) { 396 if (event_info[i].id == id) { 397 return event_info[i].name; 398 } 399 } 400 return NULL; 401} 402 403int process_event(const char *event_spec) 404{ 405 char event_name[512]; 406 char count_name[512]; 407 unsigned int i; 408 int event_idx; 409 int count_val; 410 411 strncpy(event_name, event_spec, 512); 412 count_name[0] = 0; 413 414 /* First, check if the name is followed by ":" */ 415 for (i = 0; i < strlen(event_name); i++) { 416 if (event_name[i] == 0) { 417 break; 418 } 419 if (event_name[i] == ':') { 420 strncpy(count_name, event_name+i+1, 512); 421 event_name[i] = 0; 422 break; 423 } 424 } 425 event_idx = find_event_idx_from_name(event_name); 426 if (event_idx == -1) { 427 fprintf(stderr, "Unknown event name: %s\n", event_name); 428 return -1; 429 } 430 431 /* Use default count */ 432 if (count_name[0] == 0) { 433 count_val = min_count[0]; 434 } else { 435 count_val = atoi(count_name); 436 } 437 438 selected_events[num_events] = event_idx; 439 selected_counts[num_events++] = count_val; 440 verbose("event_id is %d\n", event_info[event_idx].id); 441 verbose("count_val is %d\n", count_val); 442 return 0; 443} 444 445int echo_dev(const char* str, int val, const char* file, int counter) 446{ 447 char fullname[512]; 448 char content[128]; 449 int fd; 450 451 if (counter >= 0) { 452 snprintf(fullname, 512, OP_DRIVER_BASE"/%d/%s", counter, file); 453 } 454 else { 455 snprintf(fullname, 512, OP_DRIVER_BASE"/%s", file); 456 } 457 fd = open(fullname, O_WRONLY); 458 if (fd<0) { 459 fprintf(stderr, "Cannot open %s: %s\n", fullname, strerror(errno)); 460 return fd; 461 } 462 if (str == 0) { 463 sprintf(content, "%d", val); 464 } 465 else { 466 strncpy(content, str, 128); 467 } 468 verbose("Configure %s (%s)\n", fullname, content); 469 write(fd, content, strlen(content)); 470 close(fd); 471 return 0; 472} 473 474int read_num(const char* file) 475{ 476 char buffer[256]; 477 int fd = open(file, O_RDONLY); 478 if (fd<0) return -1; 479 int rd = read(fd, buffer, sizeof(buffer)-1); 480 buffer[rd] = 0; 481 return atoi(buffer); 482} 483 484void do_status() 485{ 486 int num; 487 char fullname[512]; 488 int i; 489 490 printf("Driver directory: %s\n", OP_DRIVER_BASE); 491 printf("Session directory: %s\n", OP_DATA_DIR); 492 for (i = 0; i < MAX_EVENTS; i++) { 493 sprintf(fullname, OP_DRIVER_BASE"/%d/enabled", i); 494 num = read_num(fullname); 495 if (num > 0) { 496 printf("Counter %d:\n", i); 497 498 /* event name */ 499 sprintf(fullname, OP_DRIVER_BASE"/%d/event", i); 500 num = read_num(fullname); 501 printf(" name: %s\n", find_event_name_from_id(num)); 502 503 /* profile interval */ 504 sprintf(fullname, OP_DRIVER_BASE"/%d/count", i); 505 num = read_num(fullname); 506 printf(" count: %d\n", num); 507 } 508 else { 509 printf("Counter %d disabled\n", i); 510 } 511 } 512 513 num = read_num(OP_DATA_DIR"/lock"); 514 if (num >= 0) { 515 int fd; 516 /* Still needs to check if this lock is left-over */ 517 sprintf(fullname, "/proc/%d", num); 518 fd = open(fullname, O_RDONLY); 519 if (fd == -1) { 520 printf("Session directory is not clean - do \"opcontrol --setup\"" 521 " before you continue\n"); 522 return; 523 } 524 else { 525 close(fd); 526 527 printf("oprofiled pid: %d\n", num); 528 num = read_num(OP_DRIVER_BASE"/enable"); 529 530 printf("profiler is%s running\n", num == 0 ? " not" : ""); 531 532 DIR* dir = opendir(OP_DRIVER_BASE"/stats"); 533 if (dir) { 534 for (struct dirent* dirent; !!(dirent = readdir(dir));) { 535 if (strlen(dirent->d_name) >= 4 && memcmp(dirent->d_name, "cpu", 3) == 0) { 536 char cpupath[256]; 537 strcpy(cpupath, OP_DRIVER_BASE"/stats/"); 538 strcat(cpupath, dirent->d_name); 539 540 strcpy(fullname, cpupath); 541 strcat(fullname, "/sample_received"); 542 num = read_num(fullname); 543 printf(" %s %9u samples received\n", dirent->d_name, num); 544 545 strcpy(fullname, cpupath); 546 strcat(fullname, "/sample_lost_overflow"); 547 num = read_num(fullname); 548 printf(" %s %9u samples lost overflow\n", dirent->d_name, num); 549 550 strcpy(fullname, cpupath); 551 strcat(fullname, "/sample_invalid_eip"); 552 num = read_num(fullname); 553 printf(" %s %9u samples invalid eip\n", dirent->d_name, num); 554 555 strcpy(fullname, cpupath); 556 strcat(fullname, "/backtrace_aborted"); 557 num = read_num(fullname); 558 printf(" %s %9u backtrace aborted\n", dirent->d_name, num); 559 } 560 } 561 closedir(dir); 562 } 563 564#if defined(__i386__) || defined(__x86_64__) 565 /* FIXME on ARM - backtrace seems broken there */ 566 num = read_num(OP_DRIVER_BASE"/backtrace_depth"); 567 printf(" %9u backtrace_depth\n", num); 568#endif 569 } 570 } 571 else { 572 printf("oprofiled is not running\n"); 573 } 574} 575 576void do_reset() 577{ 578 int fd; 579 580 fd = open(OP_DATA_DIR"/samples/current", O_RDONLY); 581 if (fd == -1) { 582 return; 583 } 584 close(fd); 585 system("rm -r "OP_DATA_DIR"/samples/current"); 586} 587 588int main(int argc, char * const argv[]) 589{ 590 int option_index; 591 bool show_status = false; 592 char* verbose_log = NULL; 593 594 /* Initialize default strings */ 595 strcpy(vmlinux, "--no-vmlinux"); 596 strcpy(kernel_range, ""); 597 598 while (1) { 599 int c = getopt_long(argc, argv, "c:e:v:r:dhVtl:", long_options, &option_index); 600 if (c == -1) { 601 break; 602 } 603 switch (c) { 604 case 0: 605 break; 606 /* --callgraph */ 607 case 'c': 608 strncpy(callgraph, optarg, sizeof(callgraph)); 609 break; 610 /* --event */ 611 case 'e': 612 if (num_events == MAX_EVENTS) { 613 fprintf(stderr, "More than %d events specified\n", 614 MAX_EVENTS); 615 exit(1); 616 } 617 if (process_event(optarg)) { 618 exit(1); 619 } 620 break; 621 /* --vmlinux */ 622 case 'v': 623 sprintf(vmlinux, "-k %s", optarg); 624 break; 625 /* --kernel-range */ 626 case 'r': 627 sprintf(kernel_range, "-r %s", optarg); 628 break; 629 case 'd': 630 /* --dump */ { 631 int pid = read_num(OP_DATA_DIR"/lock"); 632 echo_dev("1", 0, "dump", -1); 633 if (pid >= 0) { 634 sleep(1); 635 kill(pid, SIGHUP); 636 } 637 break; 638 } 639 /* --shutdown */ 640 case 'h': { 641 int pid = read_num(OP_DATA_DIR"/lock"); 642 if (pid >= 0) { 643 kill(pid, SIGHUP); /* Politely ask the daemon to close files */ 644 sleep(1); 645 kill(pid, SIGTERM);/* Politely ask the daemon to die */ 646 sleep(1); 647 kill(pid, SIGKILL); 648 } 649 setup_session_dir(); 650 break; 651 } 652 /* --verbose */ 653 case 'V': 654 verbose_print++; 655 break; 656 /* --verbose-log */ 657 case 'l': 658 verbose_log = strdup(optarg); 659 break; 660 /* --status */ 661 case 't': 662 show_status = true; 663 break; 664 default: 665 usage(); 666 exit(1); 667 } 668 } 669 verbose("list_events = %d\n", list_events); 670 verbose("setup = %d\n", setup); 671 672 if (list_events) { 673 do_list_events(); 674 } 675 676 if (quick) { 677#if defined(__i386__) || defined(__x86_64__) 678 process_event("CPU_CLK_UNHALTED"); 679#else 680 process_event("CPU_CYCLES"); 681#endif 682 setup = 1; 683 } 684 685 if (timer) { 686 setup = 1; 687 } 688 689 if (reset) { 690 do_reset(); 691 } 692 693 if (show_usage) { 694 usage(); 695 } 696 697 if (setup) { 698 if (do_setup()) { 699 fprintf(stderr, "do_setup failed"); 700 exit(1); 701 } 702 } 703 704 if (strlen(callgraph)) { 705 echo_dev(callgraph, 0, "backtrace_depth", -1); 706 } 707 708 if (num_events != 0 || timer != 0) { 709 char command[1024]; 710 int i; 711 712 strcpy(command, argv[0]); 713 char* slash = strrchr(command, '/'); 714 strcpy(slash ? slash + 1 : command, "oprofiled --session-dir="OP_DATA_DIR); 715 716#if defined(__i386__) || defined(__x86_64__) 717 /* Nothing */ 718#elif !defined(WITH_ARM_V7_A) 719 /* Since counter #3 can only handle CPU_CYCLES, check and shuffle the 720 * order a bit so that the maximal number of events can be profiled 721 * simultaneously 722 */ 723 if (num_events == 3) { 724 for (i = 0; i < num_events; i++) { 725 int event_idx = selected_events[i]; 726 727 if (event_info[event_idx].id == 0xff) { 728 break; 729 } 730 } 731 732 /* No CPU_CYCLES is found */ 733 if (i == 3) { 734 fprintf(stderr, "You can only specify three events if one of " 735 "them is CPU_CYCLES\n"); 736 exit(1); 737 } 738 /* Swap CPU_CYCLES to counter #2 (starting from #0)*/ 739 else if (i != 2) { 740 int temp; 741 742 temp = selected_events[2]; 743 selected_events[2] = selected_events[i]; 744 selected_events[i] = temp; 745 746 temp = selected_counts[2]; 747 selected_counts[2] = selected_counts[i]; 748 selected_counts[i] = temp; 749 } 750 } 751#endif 752 753 /* Configure the counters and enable them */ 754 for (i = 0; i < num_events; i++) { 755 int event_idx = selected_events[i]; 756 int setup_result = 0; 757 758 if (i == 0) { 759 snprintf(command + strlen(command), sizeof(command) - strlen(command), 760 " --events="); 761 } else { 762 snprintf(command + strlen(command), sizeof(command) - strlen(command), ","); 763 } 764 /* Compose name:id:count:unit_mask:kernel:user, something like 765 * --events=CYCLES_DATA_STALL:2:0:200000:0:1:1,.... 766 */ 767 snprintf(command + strlen(command), sizeof(command) - strlen(command), 768 "%s:%d:%d:%d:%d:1:1", 769 event_info[event_idx].name, 770 event_info[event_idx].id, 771 i, 772 selected_counts[i], 773 event_info[event_idx].um); 774 775 setup_result |= echo_dev("1", 0, "user", i); 776 setup_result |= echo_dev("1", 0, "kernel", i); 777 setup_result |= echo_dev(NULL, event_info[event_idx].um, "unit_mask", i); 778 setup_result |= echo_dev("1", 0, "enabled", i); 779 setup_result |= echo_dev(NULL, selected_counts[i], "count", i); 780 setup_result |= echo_dev(NULL, event_info[event_idx].id, 781 "event", i); 782 if (setup_result) { 783 fprintf(stderr, "Counter configuration failed for %s\n", 784 event_info[event_idx].name); 785 fprintf(stderr, "Did you do \"opcontrol --setup\" first?\n"); 786 exit(1); 787 } 788 } 789 790 if (timer == 0) { 791 /* If not in timer mode, disable unused counters */ 792 for (i = num_events; i < MAX_EVENTS; i++) { 793 echo_dev("0", 0, "enabled", i); 794 } 795 } else { 796 /* Timer mode uses empty event list */ 797 snprintf(command + strlen(command), sizeof(command) - strlen(command), 798 " --events="); 799 } 800 801 snprintf(command + strlen(command), sizeof(command) - strlen(command), 802 " %s", vmlinux); 803 if (kernel_range[0]) { 804 snprintf(command + strlen(command), sizeof(command) - strlen(command), 805 " %s", kernel_range); 806 } 807 808 if (verbose_log) { 809 snprintf(command + strlen(command), sizeof(command) - strlen(command), 810 " --verbose=%s", verbose_log); 811 } 812 813 printf("Starting oprofiled...\n"); 814 verbose("command: %s\n", command); 815 816 int rc = system(command); 817 if (rc) { 818 fprintf(stderr, "Failed, oprofile returned exit code: %d\n", rc); 819 } else { 820 sleep(2); 821 printf("Ready\n"); 822 } 823 } 824 825 if (start) { 826 echo_dev("1", 0, "enable", -1); 827 } 828 829 if (stop) { 830 echo_dev("1", 0, "dump", -1); 831 echo_dev("0", 0, "enable", -1); 832 } 833 834 if (show_status) { 835 do_status(); 836 } 837} 838