186470930SIngo Molnar /* 286470930SIngo Molnar * builtin-top.c 386470930SIngo Molnar * 486470930SIngo Molnar * Builtin top command: Display a continuously updated profile of 586470930SIngo Molnar * any workload, CPU or specific PID. 686470930SIngo Molnar * 786470930SIngo Molnar * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 886470930SIngo Molnar * 986470930SIngo Molnar * Improvements and fixes by: 1086470930SIngo Molnar * 1186470930SIngo Molnar * Arjan van de Ven <arjan@linux.intel.com> 1286470930SIngo Molnar * Yanmin Zhang <yanmin.zhang@intel.com> 1386470930SIngo Molnar * Wu Fengguang <fengguang.wu@intel.com> 1486470930SIngo Molnar * Mike Galbraith <efault@gmx.de> 1586470930SIngo Molnar * Paul Mackerras <paulus@samba.org> 1686470930SIngo Molnar * 1786470930SIngo Molnar * Released under the GPL v2. (and only v2, not any later version) 1886470930SIngo Molnar */ 1986470930SIngo Molnar #include "builtin.h" 2086470930SIngo Molnar 2186470930SIngo Molnar #include "perf.h" 2286470930SIngo Molnar 2386470930SIngo Molnar #include "util/symbol.h" 2486470930SIngo Molnar #include "util/color.h" 2586470930SIngo Molnar #include "util/util.h" 2643cbcd8aSArnaldo Carvalho de Melo #include <linux/rbtree.h> 2786470930SIngo Molnar #include "util/parse-options.h" 2886470930SIngo Molnar #include "util/parse-events.h" 2986470930SIngo Molnar 308f28827aSFrederic Weisbecker #include "util/debug.h" 318f28827aSFrederic Weisbecker 3286470930SIngo Molnar #include <assert.h> 3386470930SIngo Molnar #include <fcntl.h> 3486470930SIngo Molnar 3586470930SIngo Molnar #include <stdio.h> 36923c42c1SMike Galbraith #include <termios.h> 37923c42c1SMike Galbraith #include <unistd.h> 3886470930SIngo Molnar 3986470930SIngo Molnar #include <errno.h> 4086470930SIngo Molnar #include <time.h> 4186470930SIngo Molnar #include <sched.h> 4286470930SIngo Molnar #include <pthread.h> 4386470930SIngo Molnar 4486470930SIngo Molnar #include <sys/syscall.h> 4586470930SIngo Molnar #include <sys/ioctl.h> 4686470930SIngo Molnar #include <sys/poll.h> 4786470930SIngo Molnar #include <sys/prctl.h> 4886470930SIngo Molnar #include <sys/wait.h> 4986470930SIngo Molnar #include <sys/uio.h> 5086470930SIngo Molnar #include <sys/mman.h> 5186470930SIngo Molnar 5286470930SIngo Molnar #include <linux/unistd.h> 5386470930SIngo Molnar #include <linux/types.h> 5486470930SIngo Molnar 5586470930SIngo Molnar static int fd[MAX_NR_CPUS][MAX_COUNTERS]; 5686470930SIngo Molnar 5786470930SIngo Molnar static int system_wide = 0; 5886470930SIngo Molnar 5986470930SIngo Molnar static int default_interval = 100000; 6086470930SIngo Molnar 61923c42c1SMike Galbraith static int count_filter = 5; 6286470930SIngo Molnar static int print_entries = 15; 6386470930SIngo Molnar 6486470930SIngo Molnar static int target_pid = -1; 650fdc7e67SMike Galbraith static int inherit = 0; 6686470930SIngo Molnar static int profile_cpu = -1; 6786470930SIngo Molnar static int nr_cpus = 0; 6886470930SIngo Molnar static unsigned int realtime_prio = 0; 6986470930SIngo Molnar static int group = 0; 7086470930SIngo Molnar static unsigned int page_size; 7186470930SIngo Molnar static unsigned int mmap_pages = 16; 7286470930SIngo Molnar static int freq = 0; 7386470930SIngo Molnar 7486470930SIngo Molnar static int delay_secs = 2; 7586470930SIngo Molnar static int zero; 7686470930SIngo Molnar static int dump_symtab; 7786470930SIngo Molnar 7886470930SIngo Molnar /* 79923c42c1SMike Galbraith * Source 80923c42c1SMike Galbraith */ 81923c42c1SMike Galbraith 82923c42c1SMike Galbraith struct source_line { 83923c42c1SMike Galbraith u64 eip; 84923c42c1SMike Galbraith unsigned long count[MAX_COUNTERS]; 85923c42c1SMike Galbraith char *line; 86923c42c1SMike Galbraith struct source_line *next; 87923c42c1SMike Galbraith }; 88923c42c1SMike Galbraith 89923c42c1SMike Galbraith static char *sym_filter = NULL; 90923c42c1SMike Galbraith struct sym_entry *sym_filter_entry = NULL; 91923c42c1SMike Galbraith static int sym_pcnt_filter = 5; 92923c42c1SMike Galbraith static int sym_counter = 0; 9346ab9764SMike Galbraith static int display_weighted = -1; 94923c42c1SMike Galbraith 95923c42c1SMike Galbraith /* 9686470930SIngo Molnar * Symbols 9786470930SIngo Molnar */ 9886470930SIngo Molnar 999cffa8d5SPaul Mackerras static u64 min_ip; 1009cffa8d5SPaul Mackerras static u64 max_ip = -1ll; 10186470930SIngo Molnar 10286470930SIngo Molnar struct sym_entry { 10386470930SIngo Molnar struct rb_node rb_node; 10486470930SIngo Molnar struct list_head node; 10586470930SIngo Molnar unsigned long count[MAX_COUNTERS]; 10686470930SIngo Molnar unsigned long snap_count; 10786470930SIngo Molnar double weight; 10886470930SIngo Molnar int skip; 109923c42c1SMike Galbraith struct source_line *source; 110923c42c1SMike Galbraith struct source_line *lines; 111923c42c1SMike Galbraith struct source_line **lines_tail; 112923c42c1SMike Galbraith pthread_mutex_t source_lock; 11386470930SIngo Molnar }; 11486470930SIngo Molnar 115923c42c1SMike Galbraith /* 116923c42c1SMike Galbraith * Source functions 117923c42c1SMike Galbraith */ 118923c42c1SMike Galbraith 119923c42c1SMike Galbraith static void parse_source(struct sym_entry *syme) 120923c42c1SMike Galbraith { 121923c42c1SMike Galbraith struct symbol *sym; 122923c42c1SMike Galbraith struct module *module; 123923c42c1SMike Galbraith struct section *section = NULL; 124923c42c1SMike Galbraith FILE *file; 12583a0944fSIngo Molnar char command[PATH_MAX*2]; 12683a0944fSIngo Molnar const char *path = vmlinux_name; 127923c42c1SMike Galbraith u64 start, end, len; 128923c42c1SMike Galbraith 129923c42c1SMike Galbraith if (!syme) 130923c42c1SMike Galbraith return; 131923c42c1SMike Galbraith 132923c42c1SMike Galbraith if (syme->lines) { 133923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 134923c42c1SMike Galbraith goto out_assign; 135923c42c1SMike Galbraith } 136923c42c1SMike Galbraith 137923c42c1SMike Galbraith sym = (struct symbol *)(syme + 1); 138923c42c1SMike Galbraith module = sym->module; 139923c42c1SMike Galbraith 140923c42c1SMike Galbraith if (module) 141923c42c1SMike Galbraith path = module->path; 142923c42c1SMike Galbraith if (!path) 143923c42c1SMike Galbraith return; 144923c42c1SMike Galbraith 145923c42c1SMike Galbraith start = sym->obj_start; 146923c42c1SMike Galbraith if (!start) 147923c42c1SMike Galbraith start = sym->start; 148923c42c1SMike Galbraith 149923c42c1SMike Galbraith if (module) { 150923c42c1SMike Galbraith section = module->sections->find_section(module->sections, ".text"); 151923c42c1SMike Galbraith if (section) 152923c42c1SMike Galbraith start -= section->vma; 153923c42c1SMike Galbraith } 154923c42c1SMike Galbraith 155923c42c1SMike Galbraith end = start + sym->end - sym->start + 1; 156923c42c1SMike Galbraith len = sym->end - sym->start; 157923c42c1SMike Galbraith 158923c42c1SMike Galbraith sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", start, end, path); 159923c42c1SMike Galbraith 160923c42c1SMike Galbraith file = popen(command, "r"); 161923c42c1SMike Galbraith if (!file) 162923c42c1SMike Galbraith return; 163923c42c1SMike Galbraith 164923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 165923c42c1SMike Galbraith syme->lines_tail = &syme->lines; 166923c42c1SMike Galbraith while (!feof(file)) { 167923c42c1SMike Galbraith struct source_line *src; 168923c42c1SMike Galbraith size_t dummy = 0; 169923c42c1SMike Galbraith char *c; 170923c42c1SMike Galbraith 171923c42c1SMike Galbraith src = malloc(sizeof(struct source_line)); 172923c42c1SMike Galbraith assert(src != NULL); 173923c42c1SMike Galbraith memset(src, 0, sizeof(struct source_line)); 174923c42c1SMike Galbraith 175923c42c1SMike Galbraith if (getline(&src->line, &dummy, file) < 0) 176923c42c1SMike Galbraith break; 177923c42c1SMike Galbraith if (!src->line) 178923c42c1SMike Galbraith break; 179923c42c1SMike Galbraith 180923c42c1SMike Galbraith c = strchr(src->line, '\n'); 181923c42c1SMike Galbraith if (c) 182923c42c1SMike Galbraith *c = 0; 183923c42c1SMike Galbraith 184923c42c1SMike Galbraith src->next = NULL; 185923c42c1SMike Galbraith *syme->lines_tail = src; 186923c42c1SMike Galbraith syme->lines_tail = &src->next; 187923c42c1SMike Galbraith 188923c42c1SMike Galbraith if (strlen(src->line)>8 && src->line[8] == ':') { 189923c42c1SMike Galbraith src->eip = strtoull(src->line, NULL, 16); 190923c42c1SMike Galbraith if (section) 191923c42c1SMike Galbraith src->eip += section->vma; 192923c42c1SMike Galbraith } 193923c42c1SMike Galbraith if (strlen(src->line)>8 && src->line[16] == ':') { 194923c42c1SMike Galbraith src->eip = strtoull(src->line, NULL, 16); 195923c42c1SMike Galbraith if (section) 196923c42c1SMike Galbraith src->eip += section->vma; 197923c42c1SMike Galbraith } 198923c42c1SMike Galbraith } 199923c42c1SMike Galbraith pclose(file); 200923c42c1SMike Galbraith out_assign: 201923c42c1SMike Galbraith sym_filter_entry = syme; 202923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 203923c42c1SMike Galbraith } 204923c42c1SMike Galbraith 205923c42c1SMike Galbraith static void __zero_source_counters(struct sym_entry *syme) 206923c42c1SMike Galbraith { 207923c42c1SMike Galbraith int i; 208923c42c1SMike Galbraith struct source_line *line; 209923c42c1SMike Galbraith 210923c42c1SMike Galbraith line = syme->lines; 211923c42c1SMike Galbraith while (line) { 212923c42c1SMike Galbraith for (i = 0; i < nr_counters; i++) 213923c42c1SMike Galbraith line->count[i] = 0; 214923c42c1SMike Galbraith line = line->next; 215923c42c1SMike Galbraith } 216923c42c1SMike Galbraith } 217923c42c1SMike Galbraith 218923c42c1SMike Galbraith static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip) 219923c42c1SMike Galbraith { 220923c42c1SMike Galbraith struct source_line *line; 221923c42c1SMike Galbraith 222923c42c1SMike Galbraith if (syme != sym_filter_entry) 223923c42c1SMike Galbraith return; 224923c42c1SMike Galbraith 225923c42c1SMike Galbraith if (pthread_mutex_trylock(&syme->source_lock)) 226923c42c1SMike Galbraith return; 227923c42c1SMike Galbraith 228923c42c1SMike Galbraith if (!syme->source) 229923c42c1SMike Galbraith goto out_unlock; 230923c42c1SMike Galbraith 231923c42c1SMike Galbraith for (line = syme->lines; line; line = line->next) { 232923c42c1SMike Galbraith if (line->eip == ip) { 233923c42c1SMike Galbraith line->count[counter]++; 234923c42c1SMike Galbraith break; 235923c42c1SMike Galbraith } 236923c42c1SMike Galbraith if (line->eip > ip) 237923c42c1SMike Galbraith break; 238923c42c1SMike Galbraith } 239923c42c1SMike Galbraith out_unlock: 240923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 241923c42c1SMike Galbraith } 242923c42c1SMike Galbraith 243923c42c1SMike Galbraith static void lookup_sym_source(struct sym_entry *syme) 244923c42c1SMike Galbraith { 245923c42c1SMike Galbraith struct symbol *symbol = (struct symbol *)(syme + 1); 246923c42c1SMike Galbraith struct source_line *line; 247923c42c1SMike Galbraith char pattern[PATH_MAX]; 248923c42c1SMike Galbraith char *idx; 249923c42c1SMike Galbraith 250923c42c1SMike Galbraith sprintf(pattern, "<%s>:", symbol->name); 251923c42c1SMike Galbraith 252923c42c1SMike Galbraith if (symbol->module) { 253923c42c1SMike Galbraith idx = strstr(pattern, "\t"); 254923c42c1SMike Galbraith if (idx) 255923c42c1SMike Galbraith *idx = 0; 256923c42c1SMike Galbraith } 257923c42c1SMike Galbraith 258923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 259923c42c1SMike Galbraith for (line = syme->lines; line; line = line->next) { 260923c42c1SMike Galbraith if (strstr(line->line, pattern)) { 261923c42c1SMike Galbraith syme->source = line; 262923c42c1SMike Galbraith break; 263923c42c1SMike Galbraith } 264923c42c1SMike Galbraith } 265923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 266923c42c1SMike Galbraith } 267923c42c1SMike Galbraith 268923c42c1SMike Galbraith static void show_lines(struct source_line *queue, int count, int total) 269923c42c1SMike Galbraith { 270923c42c1SMike Galbraith int i; 271923c42c1SMike Galbraith struct source_line *line; 272923c42c1SMike Galbraith 273923c42c1SMike Galbraith line = queue; 274923c42c1SMike Galbraith for (i = 0; i < count; i++) { 275923c42c1SMike Galbraith float pcnt = 100.0*(float)line->count[sym_counter]/(float)total; 276923c42c1SMike Galbraith 277923c42c1SMike Galbraith printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line); 278923c42c1SMike Galbraith line = line->next; 279923c42c1SMike Galbraith } 280923c42c1SMike Galbraith } 281923c42c1SMike Galbraith 282923c42c1SMike Galbraith #define TRACE_COUNT 3 283923c42c1SMike Galbraith 284923c42c1SMike Galbraith static void show_details(struct sym_entry *syme) 285923c42c1SMike Galbraith { 286923c42c1SMike Galbraith struct symbol *symbol; 287923c42c1SMike Galbraith struct source_line *line; 288923c42c1SMike Galbraith struct source_line *line_queue = NULL; 289923c42c1SMike Galbraith int displayed = 0; 290923c42c1SMike Galbraith int line_queue_count = 0, total = 0, more = 0; 291923c42c1SMike Galbraith 292923c42c1SMike Galbraith if (!syme) 293923c42c1SMike Galbraith return; 294923c42c1SMike Galbraith 295923c42c1SMike Galbraith if (!syme->source) 296923c42c1SMike Galbraith lookup_sym_source(syme); 297923c42c1SMike Galbraith 298923c42c1SMike Galbraith if (!syme->source) 299923c42c1SMike Galbraith return; 300923c42c1SMike Galbraith 301923c42c1SMike Galbraith symbol = (struct symbol *)(syme + 1); 302923c42c1SMike Galbraith printf("Showing %s for %s\n", event_name(sym_counter), symbol->name); 303923c42c1SMike Galbraith printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter); 304923c42c1SMike Galbraith 305923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 306923c42c1SMike Galbraith line = syme->source; 307923c42c1SMike Galbraith while (line) { 308923c42c1SMike Galbraith total += line->count[sym_counter]; 309923c42c1SMike Galbraith line = line->next; 310923c42c1SMike Galbraith } 311923c42c1SMike Galbraith 312923c42c1SMike Galbraith line = syme->source; 313923c42c1SMike Galbraith while (line) { 314923c42c1SMike Galbraith float pcnt = 0.0; 315923c42c1SMike Galbraith 316923c42c1SMike Galbraith if (!line_queue_count) 317923c42c1SMike Galbraith line_queue = line; 318923c42c1SMike Galbraith line_queue_count++; 319923c42c1SMike Galbraith 320923c42c1SMike Galbraith if (line->count[sym_counter]) 321923c42c1SMike Galbraith pcnt = 100.0 * line->count[sym_counter] / (float)total; 322923c42c1SMike Galbraith if (pcnt >= (float)sym_pcnt_filter) { 323923c42c1SMike Galbraith if (displayed <= print_entries) 324923c42c1SMike Galbraith show_lines(line_queue, line_queue_count, total); 325923c42c1SMike Galbraith else more++; 326923c42c1SMike Galbraith displayed += line_queue_count; 327923c42c1SMike Galbraith line_queue_count = 0; 328923c42c1SMike Galbraith line_queue = NULL; 329923c42c1SMike Galbraith } else if (line_queue_count > TRACE_COUNT) { 330923c42c1SMike Galbraith line_queue = line_queue->next; 331923c42c1SMike Galbraith line_queue_count--; 332923c42c1SMike Galbraith } 333923c42c1SMike Galbraith 334923c42c1SMike Galbraith line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8; 335923c42c1SMike Galbraith line = line->next; 336923c42c1SMike Galbraith } 337923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 338923c42c1SMike Galbraith if (more) 339923c42c1SMike Galbraith printf("%d lines not displayed, maybe increase display entries [e]\n", more); 340923c42c1SMike Galbraith } 34186470930SIngo Molnar 34286470930SIngo Molnar /* 34386470930SIngo Molnar * Symbols will be added here in record_ip and will get out 34486470930SIngo Molnar * after decayed. 34586470930SIngo Molnar */ 34686470930SIngo Molnar static LIST_HEAD(active_symbols); 34786470930SIngo Molnar static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER; 34886470930SIngo Molnar 34986470930SIngo Molnar /* 35086470930SIngo Molnar * Ordering weight: count-1 * count-2 * ... / count-n 35186470930SIngo Molnar */ 35286470930SIngo Molnar static double sym_weight(const struct sym_entry *sym) 35386470930SIngo Molnar { 35486470930SIngo Molnar double weight = sym->snap_count; 35586470930SIngo Molnar int counter; 35686470930SIngo Molnar 35746ab9764SMike Galbraith if (!display_weighted) 35846ab9764SMike Galbraith return weight; 35946ab9764SMike Galbraith 36086470930SIngo Molnar for (counter = 1; counter < nr_counters-1; counter++) 36186470930SIngo Molnar weight *= sym->count[counter]; 36286470930SIngo Molnar 36386470930SIngo Molnar weight /= (sym->count[counter] + 1); 36486470930SIngo Molnar 36586470930SIngo Molnar return weight; 36686470930SIngo Molnar } 36786470930SIngo Molnar 36886470930SIngo Molnar static long samples; 36986470930SIngo Molnar static long userspace_samples; 37086470930SIngo Molnar static const char CONSOLE_CLEAR[] = "[H[2J"; 37186470930SIngo Molnar 37286470930SIngo Molnar static void __list_insert_active_sym(struct sym_entry *syme) 37386470930SIngo Molnar { 37486470930SIngo Molnar list_add(&syme->node, &active_symbols); 37586470930SIngo Molnar } 37686470930SIngo Molnar 37786470930SIngo Molnar static void list_remove_active_sym(struct sym_entry *syme) 37886470930SIngo Molnar { 37986470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 38086470930SIngo Molnar list_del_init(&syme->node); 38186470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 38286470930SIngo Molnar } 38386470930SIngo Molnar 38486470930SIngo Molnar static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se) 38586470930SIngo Molnar { 38686470930SIngo Molnar struct rb_node **p = &tree->rb_node; 38786470930SIngo Molnar struct rb_node *parent = NULL; 38886470930SIngo Molnar struct sym_entry *iter; 38986470930SIngo Molnar 39086470930SIngo Molnar while (*p != NULL) { 39186470930SIngo Molnar parent = *p; 39286470930SIngo Molnar iter = rb_entry(parent, struct sym_entry, rb_node); 39386470930SIngo Molnar 39486470930SIngo Molnar if (se->weight > iter->weight) 39586470930SIngo Molnar p = &(*p)->rb_left; 39686470930SIngo Molnar else 39786470930SIngo Molnar p = &(*p)->rb_right; 39886470930SIngo Molnar } 39986470930SIngo Molnar 40086470930SIngo Molnar rb_link_node(&se->rb_node, parent, p); 40186470930SIngo Molnar rb_insert_color(&se->rb_node, tree); 40286470930SIngo Molnar } 40386470930SIngo Molnar 40486470930SIngo Molnar static void print_sym_table(void) 40586470930SIngo Molnar { 40686470930SIngo Molnar int printed = 0, j; 40746ab9764SMike Galbraith int counter, snap = !display_weighted ? sym_counter : 0; 40886470930SIngo Molnar float samples_per_sec = samples/delay_secs; 40986470930SIngo Molnar float ksamples_per_sec = (samples-userspace_samples)/delay_secs; 41086470930SIngo Molnar float sum_ksamples = 0.0; 41186470930SIngo Molnar struct sym_entry *syme, *n; 41286470930SIngo Molnar struct rb_root tmp = RB_ROOT; 41386470930SIngo Molnar struct rb_node *nd; 41486470930SIngo Molnar 41586470930SIngo Molnar samples = userspace_samples = 0; 41686470930SIngo Molnar 41786470930SIngo Molnar /* Sort the active symbols */ 41886470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 41986470930SIngo Molnar syme = list_entry(active_symbols.next, struct sym_entry, node); 42086470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 42186470930SIngo Molnar 42286470930SIngo Molnar list_for_each_entry_safe_from(syme, n, &active_symbols, node) { 42346ab9764SMike Galbraith syme->snap_count = syme->count[snap]; 42486470930SIngo Molnar if (syme->snap_count != 0) { 42586470930SIngo Molnar syme->weight = sym_weight(syme); 42686470930SIngo Molnar rb_insert_active_sym(&tmp, syme); 42786470930SIngo Molnar sum_ksamples += syme->snap_count; 42886470930SIngo Molnar 42986470930SIngo Molnar for (j = 0; j < nr_counters; j++) 43086470930SIngo Molnar syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8; 43186470930SIngo Molnar } else 43286470930SIngo Molnar list_remove_active_sym(syme); 43386470930SIngo Molnar } 43486470930SIngo Molnar 43586470930SIngo Molnar puts(CONSOLE_CLEAR); 43686470930SIngo Molnar 43786470930SIngo Molnar printf( 43886470930SIngo Molnar "------------------------------------------------------------------------------\n"); 43986470930SIngo Molnar printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [", 44086470930SIngo Molnar samples_per_sec, 44186470930SIngo Molnar 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec))); 44286470930SIngo Molnar 44346ab9764SMike Galbraith if (nr_counters == 1 || !display_weighted) { 4449cffa8d5SPaul Mackerras printf("%Ld", (u64)attrs[0].sample_period); 44586470930SIngo Molnar if (freq) 44686470930SIngo Molnar printf("Hz "); 44786470930SIngo Molnar else 44886470930SIngo Molnar printf(" "); 44986470930SIngo Molnar } 45086470930SIngo Molnar 45146ab9764SMike Galbraith if (!display_weighted) 45246ab9764SMike Galbraith printf("%s", event_name(sym_counter)); 45346ab9764SMike Galbraith else for (counter = 0; counter < nr_counters; counter++) { 45486470930SIngo Molnar if (counter) 45586470930SIngo Molnar printf("/"); 45686470930SIngo Molnar 45786470930SIngo Molnar printf("%s", event_name(counter)); 45886470930SIngo Molnar } 45986470930SIngo Molnar 46086470930SIngo Molnar printf( "], "); 46186470930SIngo Molnar 46286470930SIngo Molnar if (target_pid != -1) 46386470930SIngo Molnar printf(" (target_pid: %d", target_pid); 46486470930SIngo Molnar else 46586470930SIngo Molnar printf(" (all"); 46686470930SIngo Molnar 46786470930SIngo Molnar if (profile_cpu != -1) 46886470930SIngo Molnar printf(", cpu: %d)\n", profile_cpu); 46986470930SIngo Molnar else { 47086470930SIngo Molnar if (target_pid != -1) 47186470930SIngo Molnar printf(")\n"); 47286470930SIngo Molnar else 47386470930SIngo Molnar printf(", %d CPUs)\n", nr_cpus); 47486470930SIngo Molnar } 47586470930SIngo Molnar 47686470930SIngo Molnar printf("------------------------------------------------------------------------------\n\n"); 47786470930SIngo Molnar 478923c42c1SMike Galbraith if (sym_filter_entry) { 479923c42c1SMike Galbraith show_details(sym_filter_entry); 480923c42c1SMike Galbraith return; 481923c42c1SMike Galbraith } 482923c42c1SMike Galbraith 48386470930SIngo Molnar if (nr_counters == 1) 48486470930SIngo Molnar printf(" samples pcnt"); 48586470930SIngo Molnar else 48686470930SIngo Molnar printf(" weight samples pcnt"); 48786470930SIngo Molnar 4887ced156bSArnaldo Carvalho de Melo if (verbose) 4897ced156bSArnaldo Carvalho de Melo printf(" RIP "); 4907ced156bSArnaldo Carvalho de Melo printf(" kernel function\n"); 4917ced156bSArnaldo Carvalho de Melo printf(" %s _______ _____", 4927ced156bSArnaldo Carvalho de Melo nr_counters == 1 ? " " : "______"); 4937ced156bSArnaldo Carvalho de Melo if (verbose) 4947ced156bSArnaldo Carvalho de Melo printf(" ________________"); 4957ced156bSArnaldo Carvalho de Melo printf(" _______________\n\n"); 49686470930SIngo Molnar 49786470930SIngo Molnar for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { 49883a0944fSIngo Molnar struct symbol *sym; 49986470930SIngo Molnar double pcnt; 50086470930SIngo Molnar 50183a0944fSIngo Molnar syme = rb_entry(nd, struct sym_entry, rb_node); 50283a0944fSIngo Molnar sym = (struct symbol *)(syme + 1); 50383a0944fSIngo Molnar 504923c42c1SMike Galbraith if (++printed > print_entries || (int)syme->snap_count < count_filter) 50586470930SIngo Molnar continue; 50686470930SIngo Molnar 50786470930SIngo Molnar pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / 50886470930SIngo Molnar sum_ksamples)); 50986470930SIngo Molnar 51046ab9764SMike Galbraith if (nr_counters == 1 || !display_weighted) 51186470930SIngo Molnar printf("%20.2f - ", syme->weight); 51286470930SIngo Molnar else 51386470930SIngo Molnar printf("%9.1f %10ld - ", syme->weight, syme->snap_count); 51486470930SIngo Molnar 5151e11fd82SFrederic Weisbecker percent_color_fprintf(stdout, "%4.1f%%", pcnt); 5167ced156bSArnaldo Carvalho de Melo if (verbose) 5177ced156bSArnaldo Carvalho de Melo printf(" - %016llx", sym->start); 5187ced156bSArnaldo Carvalho de Melo printf(" : %s", sym->name); 51942976487SMike Galbraith if (sym->module) 52042976487SMike Galbraith printf("\t[%s]", sym->module->name); 52142976487SMike Galbraith printf("\n"); 52286470930SIngo Molnar } 52386470930SIngo Molnar } 52486470930SIngo Molnar 525923c42c1SMike Galbraith static void prompt_integer(int *target, const char *msg) 526923c42c1SMike Galbraith { 527923c42c1SMike Galbraith char *buf = malloc(0), *p; 528923c42c1SMike Galbraith size_t dummy = 0; 529923c42c1SMike Galbraith int tmp; 530923c42c1SMike Galbraith 531923c42c1SMike Galbraith fprintf(stdout, "\n%s: ", msg); 532923c42c1SMike Galbraith if (getline(&buf, &dummy, stdin) < 0) 533923c42c1SMike Galbraith return; 534923c42c1SMike Galbraith 535923c42c1SMike Galbraith p = strchr(buf, '\n'); 536923c42c1SMike Galbraith if (p) 537923c42c1SMike Galbraith *p = 0; 538923c42c1SMike Galbraith 539923c42c1SMike Galbraith p = buf; 540923c42c1SMike Galbraith while(*p) { 541923c42c1SMike Galbraith if (!isdigit(*p)) 542923c42c1SMike Galbraith goto out_free; 543923c42c1SMike Galbraith p++; 544923c42c1SMike Galbraith } 545923c42c1SMike Galbraith tmp = strtoul(buf, NULL, 10); 546923c42c1SMike Galbraith *target = tmp; 547923c42c1SMike Galbraith out_free: 548923c42c1SMike Galbraith free(buf); 549923c42c1SMike Galbraith } 550923c42c1SMike Galbraith 551923c42c1SMike Galbraith static void prompt_percent(int *target, const char *msg) 552923c42c1SMike Galbraith { 553923c42c1SMike Galbraith int tmp = 0; 554923c42c1SMike Galbraith 555923c42c1SMike Galbraith prompt_integer(&tmp, msg); 556923c42c1SMike Galbraith if (tmp >= 0 && tmp <= 100) 557923c42c1SMike Galbraith *target = tmp; 558923c42c1SMike Galbraith } 559923c42c1SMike Galbraith 560923c42c1SMike Galbraith static void prompt_symbol(struct sym_entry **target, const char *msg) 561923c42c1SMike Galbraith { 562923c42c1SMike Galbraith char *buf = malloc(0), *p; 563923c42c1SMike Galbraith struct sym_entry *syme = *target, *n, *found = NULL; 564923c42c1SMike Galbraith size_t dummy = 0; 565923c42c1SMike Galbraith 566923c42c1SMike Galbraith /* zero counters of active symbol */ 567923c42c1SMike Galbraith if (syme) { 568923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 569923c42c1SMike Galbraith __zero_source_counters(syme); 570923c42c1SMike Galbraith *target = NULL; 571923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 572923c42c1SMike Galbraith } 573923c42c1SMike Galbraith 574923c42c1SMike Galbraith fprintf(stdout, "\n%s: ", msg); 575923c42c1SMike Galbraith if (getline(&buf, &dummy, stdin) < 0) 576923c42c1SMike Galbraith goto out_free; 577923c42c1SMike Galbraith 578923c42c1SMike Galbraith p = strchr(buf, '\n'); 579923c42c1SMike Galbraith if (p) 580923c42c1SMike Galbraith *p = 0; 581923c42c1SMike Galbraith 582923c42c1SMike Galbraith pthread_mutex_lock(&active_symbols_lock); 583923c42c1SMike Galbraith syme = list_entry(active_symbols.next, struct sym_entry, node); 584923c42c1SMike Galbraith pthread_mutex_unlock(&active_symbols_lock); 585923c42c1SMike Galbraith 586923c42c1SMike Galbraith list_for_each_entry_safe_from(syme, n, &active_symbols, node) { 587923c42c1SMike Galbraith struct symbol *sym = (struct symbol *)(syme + 1); 588923c42c1SMike Galbraith 589923c42c1SMike Galbraith if (!strcmp(buf, sym->name)) { 590923c42c1SMike Galbraith found = syme; 591923c42c1SMike Galbraith break; 592923c42c1SMike Galbraith } 593923c42c1SMike Galbraith } 594923c42c1SMike Galbraith 595923c42c1SMike Galbraith if (!found) { 596923c42c1SMike Galbraith fprintf(stderr, "Sorry, %s is not active.\n", sym_filter); 597923c42c1SMike Galbraith sleep(1); 598923c42c1SMike Galbraith return; 599923c42c1SMike Galbraith } else 600923c42c1SMike Galbraith parse_source(found); 601923c42c1SMike Galbraith 602923c42c1SMike Galbraith out_free: 603923c42c1SMike Galbraith free(buf); 604923c42c1SMike Galbraith } 605923c42c1SMike Galbraith 606091bd2e9SMike Galbraith static void print_mapped_keys(void) 607923c42c1SMike Galbraith { 608091bd2e9SMike Galbraith char *name = NULL; 609091bd2e9SMike Galbraith 610091bd2e9SMike Galbraith if (sym_filter_entry) { 611091bd2e9SMike Galbraith struct symbol *sym = (struct symbol *)(sym_filter_entry+1); 612091bd2e9SMike Galbraith name = sym->name; 613091bd2e9SMike Galbraith } 614091bd2e9SMike Galbraith 615091bd2e9SMike Galbraith fprintf(stdout, "\nMapped keys:\n"); 616091bd2e9SMike Galbraith fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs); 617091bd2e9SMike Galbraith fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries); 618091bd2e9SMike Galbraith 619091bd2e9SMike Galbraith if (nr_counters > 1) 62046ab9764SMike Galbraith fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter)); 621091bd2e9SMike Galbraith 622091bd2e9SMike Galbraith fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter); 623091bd2e9SMike Galbraith 62483a0944fSIngo Molnar if (vmlinux_name) { 625091bd2e9SMike Galbraith fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter); 626091bd2e9SMike Galbraith fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 627091bd2e9SMike Galbraith fprintf(stdout, "\t[S] stop annotation.\n"); 628091bd2e9SMike Galbraith } 629091bd2e9SMike Galbraith 630091bd2e9SMike Galbraith if (nr_counters > 1) 63146ab9764SMike Galbraith fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0); 632091bd2e9SMike Galbraith 63346ab9764SMike Galbraith fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0); 634091bd2e9SMike Galbraith fprintf(stdout, "\t[qQ] quit.\n"); 635091bd2e9SMike Galbraith } 636091bd2e9SMike Galbraith 637091bd2e9SMike Galbraith static int key_mapped(int c) 638091bd2e9SMike Galbraith { 639091bd2e9SMike Galbraith switch (c) { 640091bd2e9SMike Galbraith case 'd': 641091bd2e9SMike Galbraith case 'e': 642091bd2e9SMike Galbraith case 'f': 643091bd2e9SMike Galbraith case 'z': 644091bd2e9SMike Galbraith case 'q': 645091bd2e9SMike Galbraith case 'Q': 646091bd2e9SMike Galbraith return 1; 647091bd2e9SMike Galbraith case 'E': 648091bd2e9SMike Galbraith case 'w': 649091bd2e9SMike Galbraith return nr_counters > 1 ? 1 : 0; 650091bd2e9SMike Galbraith case 'F': 651091bd2e9SMike Galbraith case 's': 652091bd2e9SMike Galbraith case 'S': 65383a0944fSIngo Molnar return vmlinux_name ? 1 : 0; 65483a0944fSIngo Molnar default: 65583a0944fSIngo Molnar break; 656091bd2e9SMike Galbraith } 657091bd2e9SMike Galbraith 658091bd2e9SMike Galbraith return 0; 659923c42c1SMike Galbraith } 660923c42c1SMike Galbraith 661923c42c1SMike Galbraith static void handle_keypress(int c) 662923c42c1SMike Galbraith { 663091bd2e9SMike Galbraith if (!key_mapped(c)) { 664091bd2e9SMike Galbraith struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 665091bd2e9SMike Galbraith struct termios tc, save; 666091bd2e9SMike Galbraith 667091bd2e9SMike Galbraith print_mapped_keys(); 668091bd2e9SMike Galbraith fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 669091bd2e9SMike Galbraith fflush(stdout); 670091bd2e9SMike Galbraith 671091bd2e9SMike Galbraith tcgetattr(0, &save); 672091bd2e9SMike Galbraith tc = save; 673091bd2e9SMike Galbraith tc.c_lflag &= ~(ICANON | ECHO); 674091bd2e9SMike Galbraith tc.c_cc[VMIN] = 0; 675091bd2e9SMike Galbraith tc.c_cc[VTIME] = 0; 676091bd2e9SMike Galbraith tcsetattr(0, TCSANOW, &tc); 677091bd2e9SMike Galbraith 678091bd2e9SMike Galbraith poll(&stdin_poll, 1, -1); 679091bd2e9SMike Galbraith c = getc(stdin); 680091bd2e9SMike Galbraith 681091bd2e9SMike Galbraith tcsetattr(0, TCSAFLUSH, &save); 682091bd2e9SMike Galbraith if (!key_mapped(c)) 683091bd2e9SMike Galbraith return; 684091bd2e9SMike Galbraith } 685091bd2e9SMike Galbraith 686923c42c1SMike Galbraith switch (c) { 687923c42c1SMike Galbraith case 'd': 688923c42c1SMike Galbraith prompt_integer(&delay_secs, "Enter display delay"); 689923c42c1SMike Galbraith break; 690923c42c1SMike Galbraith case 'e': 691923c42c1SMike Galbraith prompt_integer(&print_entries, "Enter display entries (lines)"); 692923c42c1SMike Galbraith break; 693923c42c1SMike Galbraith case 'E': 694923c42c1SMike Galbraith if (nr_counters > 1) { 695923c42c1SMike Galbraith int i; 696923c42c1SMike Galbraith 697923c42c1SMike Galbraith fprintf(stderr, "\nAvailable events:"); 698923c42c1SMike Galbraith for (i = 0; i < nr_counters; i++) 699923c42c1SMike Galbraith fprintf(stderr, "\n\t%d %s", i, event_name(i)); 700923c42c1SMike Galbraith 701923c42c1SMike Galbraith prompt_integer(&sym_counter, "Enter details event counter"); 702923c42c1SMike Galbraith 703923c42c1SMike Galbraith if (sym_counter >= nr_counters) { 704923c42c1SMike Galbraith fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0)); 705923c42c1SMike Galbraith sym_counter = 0; 706923c42c1SMike Galbraith sleep(1); 707923c42c1SMike Galbraith } 708923c42c1SMike Galbraith } else sym_counter = 0; 709923c42c1SMike Galbraith break; 710923c42c1SMike Galbraith case 'f': 711923c42c1SMike Galbraith prompt_integer(&count_filter, "Enter display event count filter"); 712923c42c1SMike Galbraith break; 713923c42c1SMike Galbraith case 'F': 714923c42c1SMike Galbraith prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)"); 715923c42c1SMike Galbraith break; 716923c42c1SMike Galbraith case 'q': 717923c42c1SMike Galbraith case 'Q': 718923c42c1SMike Galbraith printf("exiting.\n"); 719923c42c1SMike Galbraith exit(0); 720923c42c1SMike Galbraith case 's': 721923c42c1SMike Galbraith prompt_symbol(&sym_filter_entry, "Enter details symbol"); 722923c42c1SMike Galbraith break; 723923c42c1SMike Galbraith case 'S': 724923c42c1SMike Galbraith if (!sym_filter_entry) 725923c42c1SMike Galbraith break; 726923c42c1SMike Galbraith else { 727923c42c1SMike Galbraith struct sym_entry *syme = sym_filter_entry; 728923c42c1SMike Galbraith 729923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 730923c42c1SMike Galbraith sym_filter_entry = NULL; 731923c42c1SMike Galbraith __zero_source_counters(syme); 732923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 733923c42c1SMike Galbraith } 734923c42c1SMike Galbraith break; 73546ab9764SMike Galbraith case 'w': 73646ab9764SMike Galbraith display_weighted = ~display_weighted; 73746ab9764SMike Galbraith break; 738923c42c1SMike Galbraith case 'z': 739923c42c1SMike Galbraith zero = ~zero; 740923c42c1SMike Galbraith break; 74183a0944fSIngo Molnar default: 74283a0944fSIngo Molnar break; 743923c42c1SMike Galbraith } 744923c42c1SMike Galbraith } 745923c42c1SMike Galbraith 746f37a291cSIngo Molnar static void *display_thread(void *arg __used) 74786470930SIngo Molnar { 74886470930SIngo Molnar struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 749923c42c1SMike Galbraith struct termios tc, save; 750923c42c1SMike Galbraith int delay_msecs, c; 75186470930SIngo Molnar 752923c42c1SMike Galbraith tcgetattr(0, &save); 753923c42c1SMike Galbraith tc = save; 754923c42c1SMike Galbraith tc.c_lflag &= ~(ICANON | ECHO); 755923c42c1SMike Galbraith tc.c_cc[VMIN] = 0; 756923c42c1SMike Galbraith tc.c_cc[VTIME] = 0; 757091bd2e9SMike Galbraith 758923c42c1SMike Galbraith repeat: 759923c42c1SMike Galbraith delay_msecs = delay_secs * 1000; 760923c42c1SMike Galbraith tcsetattr(0, TCSANOW, &tc); 761923c42c1SMike Galbraith /* trash return*/ 762923c42c1SMike Galbraith getc(stdin); 76386470930SIngo Molnar 76486470930SIngo Molnar do { 76586470930SIngo Molnar print_sym_table(); 76686470930SIngo Molnar } while (!poll(&stdin_poll, 1, delay_msecs) == 1); 76786470930SIngo Molnar 768923c42c1SMike Galbraith c = getc(stdin); 769923c42c1SMike Galbraith tcsetattr(0, TCSAFLUSH, &save); 770923c42c1SMike Galbraith 771923c42c1SMike Galbraith handle_keypress(c); 772923c42c1SMike Galbraith goto repeat; 77386470930SIngo Molnar 77486470930SIngo Molnar return NULL; 77586470930SIngo Molnar } 77686470930SIngo Molnar 7772ab52083SAnton Blanchard /* Tag samples to be skipped. */ 778f37a291cSIngo Molnar static const char *skip_symbols[] = { 7792ab52083SAnton Blanchard "default_idle", 7802ab52083SAnton Blanchard "cpu_idle", 7812ab52083SAnton Blanchard "enter_idle", 7822ab52083SAnton Blanchard "exit_idle", 7832ab52083SAnton Blanchard "mwait_idle", 78459b90056SArnaldo Carvalho de Melo "mwait_idle_with_hints", 7853a3393efSAnton Blanchard "ppc64_runlatch_off", 7863a3393efSAnton Blanchard "pseries_dedicated_idle_sleep", 7872ab52083SAnton Blanchard NULL 7882ab52083SAnton Blanchard }; 7892ab52083SAnton Blanchard 79086470930SIngo Molnar static int symbol_filter(struct dso *self, struct symbol *sym) 79186470930SIngo Molnar { 79286470930SIngo Molnar struct sym_entry *syme; 79386470930SIngo Molnar const char *name = sym->name; 7942ab52083SAnton Blanchard int i; 79586470930SIngo Molnar 7963a3393efSAnton Blanchard /* 7973a3393efSAnton Blanchard * ppc64 uses function descriptors and appends a '.' to the 7983a3393efSAnton Blanchard * start of every instruction address. Remove it. 7993a3393efSAnton Blanchard */ 8003a3393efSAnton Blanchard if (name[0] == '.') 8013a3393efSAnton Blanchard name++; 8023a3393efSAnton Blanchard 80386470930SIngo Molnar if (!strcmp(name, "_text") || 80486470930SIngo Molnar !strcmp(name, "_etext") || 80586470930SIngo Molnar !strcmp(name, "_sinittext") || 80686470930SIngo Molnar !strncmp("init_module", name, 11) || 80786470930SIngo Molnar !strncmp("cleanup_module", name, 14) || 80886470930SIngo Molnar strstr(name, "_text_start") || 80986470930SIngo Molnar strstr(name, "_text_end")) 81086470930SIngo Molnar return 1; 81186470930SIngo Molnar 81286470930SIngo Molnar syme = dso__sym_priv(self, sym); 813923c42c1SMike Galbraith pthread_mutex_init(&syme->source_lock, NULL); 814923c42c1SMike Galbraith if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) 815923c42c1SMike Galbraith sym_filter_entry = syme; 816923c42c1SMike Galbraith 8172ab52083SAnton Blanchard for (i = 0; skip_symbols[i]; i++) { 8182ab52083SAnton Blanchard if (!strcmp(skip_symbols[i], name)) { 81986470930SIngo Molnar syme->skip = 1; 8202ab52083SAnton Blanchard break; 8212ab52083SAnton Blanchard } 8222ab52083SAnton Blanchard } 82386470930SIngo Molnar 82486470930SIngo Molnar return 0; 82586470930SIngo Molnar } 82686470930SIngo Molnar 82786470930SIngo Molnar static int parse_symbols(void) 82886470930SIngo Molnar { 82986470930SIngo Molnar struct rb_node *node; 83086470930SIngo Molnar struct symbol *sym; 83183a0944fSIngo Molnar int use_modules = vmlinux_name ? 1 : 0; 83286470930SIngo Molnar 83386470930SIngo Molnar kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry)); 83486470930SIngo Molnar if (kernel_dso == NULL) 83586470930SIngo Molnar return -1; 83686470930SIngo Molnar 83783a0944fSIngo Molnar if (dso__load_kernel(kernel_dso, vmlinux_name, symbol_filter, verbose, use_modules) <= 0) 83886470930SIngo Molnar goto out_delete_dso; 83986470930SIngo Molnar 84086470930SIngo Molnar node = rb_first(&kernel_dso->syms); 84186470930SIngo Molnar sym = rb_entry(node, struct symbol, rb_node); 84286470930SIngo Molnar min_ip = sym->start; 84386470930SIngo Molnar 84486470930SIngo Molnar node = rb_last(&kernel_dso->syms); 84586470930SIngo Molnar sym = rb_entry(node, struct symbol, rb_node); 84686470930SIngo Molnar max_ip = sym->end; 84786470930SIngo Molnar 84886470930SIngo Molnar if (dump_symtab) 84986470930SIngo Molnar dso__fprintf(kernel_dso, stderr); 85086470930SIngo Molnar 85186470930SIngo Molnar return 0; 85286470930SIngo Molnar 85386470930SIngo Molnar out_delete_dso: 85486470930SIngo Molnar dso__delete(kernel_dso); 85586470930SIngo Molnar kernel_dso = NULL; 85686470930SIngo Molnar return -1; 85786470930SIngo Molnar } 85886470930SIngo Molnar 85986470930SIngo Molnar /* 86086470930SIngo Molnar * Binary search in the histogram table and record the hit: 86186470930SIngo Molnar */ 8629cffa8d5SPaul Mackerras static void record_ip(u64 ip, int counter) 86386470930SIngo Molnar { 86486470930SIngo Molnar struct symbol *sym = dso__find_symbol(kernel_dso, ip); 86586470930SIngo Molnar 86686470930SIngo Molnar if (sym != NULL) { 86786470930SIngo Molnar struct sym_entry *syme = dso__sym_priv(kernel_dso, sym); 86886470930SIngo Molnar 86986470930SIngo Molnar if (!syme->skip) { 87086470930SIngo Molnar syme->count[counter]++; 871923c42c1SMike Galbraith record_precise_ip(syme, counter, ip); 87286470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 87386470930SIngo Molnar if (list_empty(&syme->node) || !syme->node.next) 87486470930SIngo Molnar __list_insert_active_sym(syme); 87586470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 87686470930SIngo Molnar return; 87786470930SIngo Molnar } 87886470930SIngo Molnar } 87986470930SIngo Molnar 88086470930SIngo Molnar samples--; 88186470930SIngo Molnar } 88286470930SIngo Molnar 883e6e18ec7SPeter Zijlstra static void process_event(u64 ip, int counter, int user) 88486470930SIngo Molnar { 88586470930SIngo Molnar samples++; 88686470930SIngo Molnar 887e6e18ec7SPeter Zijlstra if (user) { 88886470930SIngo Molnar userspace_samples++; 88986470930SIngo Molnar return; 89086470930SIngo Molnar } 89186470930SIngo Molnar 89286470930SIngo Molnar record_ip(ip, counter); 89386470930SIngo Molnar } 89486470930SIngo Molnar 89586470930SIngo Molnar struct mmap_data { 89686470930SIngo Molnar int counter; 89786470930SIngo Molnar void *base; 898f37a291cSIngo Molnar int mask; 89986470930SIngo Molnar unsigned int prev; 90086470930SIngo Molnar }; 90186470930SIngo Molnar 90286470930SIngo Molnar static unsigned int mmap_read_head(struct mmap_data *md) 90386470930SIngo Molnar { 90486470930SIngo Molnar struct perf_counter_mmap_page *pc = md->base; 90586470930SIngo Molnar int head; 90686470930SIngo Molnar 90786470930SIngo Molnar head = pc->data_head; 90886470930SIngo Molnar rmb(); 90986470930SIngo Molnar 91086470930SIngo Molnar return head; 91186470930SIngo Molnar } 91286470930SIngo Molnar 91386470930SIngo Molnar struct timeval last_read, this_read; 91486470930SIngo Molnar 9152f01190aSFrederic Weisbecker static void mmap_read_counter(struct mmap_data *md) 91686470930SIngo Molnar { 91786470930SIngo Molnar unsigned int head = mmap_read_head(md); 91886470930SIngo Molnar unsigned int old = md->prev; 91986470930SIngo Molnar unsigned char *data = md->base + page_size; 92086470930SIngo Molnar int diff; 92186470930SIngo Molnar 92286470930SIngo Molnar gettimeofday(&this_read, NULL); 92386470930SIngo Molnar 92486470930SIngo Molnar /* 92586470930SIngo Molnar * If we're further behind than half the buffer, there's a chance 92686470930SIngo Molnar * the writer will bite our tail and mess up the samples under us. 92786470930SIngo Molnar * 92886470930SIngo Molnar * If we somehow ended up ahead of the head, we got messed up. 92986470930SIngo Molnar * 93086470930SIngo Molnar * In either case, truncate and restart at head. 93186470930SIngo Molnar */ 93286470930SIngo Molnar diff = head - old; 93386470930SIngo Molnar if (diff > md->mask / 2 || diff < 0) { 93486470930SIngo Molnar struct timeval iv; 93586470930SIngo Molnar unsigned long msecs; 93686470930SIngo Molnar 93786470930SIngo Molnar timersub(&this_read, &last_read, &iv); 93886470930SIngo Molnar msecs = iv.tv_sec*1000 + iv.tv_usec/1000; 93986470930SIngo Molnar 94086470930SIngo Molnar fprintf(stderr, "WARNING: failed to keep up with mmap data." 94186470930SIngo Molnar " Last read %lu msecs ago.\n", msecs); 94286470930SIngo Molnar 94386470930SIngo Molnar /* 94486470930SIngo Molnar * head points to a known good entry, start there. 94586470930SIngo Molnar */ 94686470930SIngo Molnar old = head; 94786470930SIngo Molnar } 94886470930SIngo Molnar 94986470930SIngo Molnar last_read = this_read; 95086470930SIngo Molnar 95186470930SIngo Molnar for (; old != head;) { 95286470930SIngo Molnar event_t *event = (event_t *)&data[old & md->mask]; 95386470930SIngo Molnar 95486470930SIngo Molnar event_t event_copy; 95586470930SIngo Molnar 95686470930SIngo Molnar size_t size = event->header.size; 95786470930SIngo Molnar 95886470930SIngo Molnar /* 95986470930SIngo Molnar * Event straddles the mmap boundary -- header should always 96086470930SIngo Molnar * be inside due to u64 alignment of output. 96186470930SIngo Molnar */ 96286470930SIngo Molnar if ((old & md->mask) + size != ((old + size) & md->mask)) { 96386470930SIngo Molnar unsigned int offset = old; 96486470930SIngo Molnar unsigned int len = min(sizeof(*event), size), cpy; 96586470930SIngo Molnar void *dst = &event_copy; 96686470930SIngo Molnar 96786470930SIngo Molnar do { 96886470930SIngo Molnar cpy = min(md->mask + 1 - (offset & md->mask), len); 96986470930SIngo Molnar memcpy(dst, &data[offset & md->mask], cpy); 97086470930SIngo Molnar offset += cpy; 97186470930SIngo Molnar dst += cpy; 97286470930SIngo Molnar len -= cpy; 97386470930SIngo Molnar } while (len); 97486470930SIngo Molnar 97586470930SIngo Molnar event = &event_copy; 97686470930SIngo Molnar } 97786470930SIngo Molnar 97886470930SIngo Molnar old += size; 97986470930SIngo Molnar 980e6e18ec7SPeter Zijlstra if (event->header.type == PERF_EVENT_SAMPLE) { 981e6e18ec7SPeter Zijlstra int user = 982e6e18ec7SPeter Zijlstra (event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK) == PERF_EVENT_MISC_USER; 983e6e18ec7SPeter Zijlstra process_event(event->ip.ip, md->counter, user); 98486470930SIngo Molnar } 98586470930SIngo Molnar } 98686470930SIngo Molnar 98786470930SIngo Molnar md->prev = old; 98886470930SIngo Molnar } 98986470930SIngo Molnar 99086470930SIngo Molnar static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; 99186470930SIngo Molnar static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; 99286470930SIngo Molnar 9932f01190aSFrederic Weisbecker static void mmap_read(void) 9942f01190aSFrederic Weisbecker { 9952f01190aSFrederic Weisbecker int i, counter; 9962f01190aSFrederic Weisbecker 9972f01190aSFrederic Weisbecker for (i = 0; i < nr_cpus; i++) { 9982f01190aSFrederic Weisbecker for (counter = 0; counter < nr_counters; counter++) 9992f01190aSFrederic Weisbecker mmap_read_counter(&mmap_array[i][counter]); 10002f01190aSFrederic Weisbecker } 10012f01190aSFrederic Weisbecker } 10022f01190aSFrederic Weisbecker 1003716c69feSIngo Molnar int nr_poll; 1004716c69feSIngo Molnar int group_fd; 1005716c69feSIngo Molnar 1006716c69feSIngo Molnar static void start_counter(int i, int counter) 100786470930SIngo Molnar { 100886470930SIngo Molnar struct perf_counter_attr *attr; 10090fdc7e67SMike Galbraith int cpu; 101086470930SIngo Molnar 101186470930SIngo Molnar cpu = profile_cpu; 101286470930SIngo Molnar if (target_pid == -1 && profile_cpu == -1) 101386470930SIngo Molnar cpu = i; 101486470930SIngo Molnar 101586470930SIngo Molnar attr = attrs + counter; 101686470930SIngo Molnar 101786470930SIngo Molnar attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; 101886470930SIngo Molnar attr->freq = freq; 10190fdc7e67SMike Galbraith attr->inherit = (cpu < 0) && inherit; 102086470930SIngo Molnar 1021716c69feSIngo Molnar try_again: 102286470930SIngo Molnar fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0); 1023716c69feSIngo Molnar 102486470930SIngo Molnar if (fd[i][counter] < 0) { 102586470930SIngo Molnar int err = errno; 102686470930SIngo Molnar 102786470930SIngo Molnar if (err == EPERM) 1028716c69feSIngo Molnar die("No permission - are you root?\n"); 1029716c69feSIngo Molnar /* 1030716c69feSIngo Molnar * If it's cycles then fall back to hrtimer 1031716c69feSIngo Molnar * based cpu-clock-tick sw counter, which 1032716c69feSIngo Molnar * is always available even if no PMU support: 1033716c69feSIngo Molnar */ 1034716c69feSIngo Molnar if (attr->type == PERF_TYPE_HARDWARE 1035f4dbfa8fSPeter Zijlstra && attr->config == PERF_COUNT_HW_CPU_CYCLES) { 1036716c69feSIngo Molnar 10373da297a6SIngo Molnar if (verbose) 1038716c69feSIngo Molnar warning(" ... trying to fall back to cpu-clock-ticks\n"); 10393da297a6SIngo Molnar 1040716c69feSIngo Molnar attr->type = PERF_TYPE_SOFTWARE; 1041f4dbfa8fSPeter Zijlstra attr->config = PERF_COUNT_SW_CPU_CLOCK; 1042716c69feSIngo Molnar goto try_again; 1043716c69feSIngo Molnar } 104430c806a0SIngo Molnar printf("\n"); 104530c806a0SIngo Molnar error("perfcounter syscall returned with %d (%s)\n", 104630c806a0SIngo Molnar fd[i][counter], strerror(err)); 104730c806a0SIngo Molnar die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); 104886470930SIngo Molnar exit(-1); 104986470930SIngo Molnar } 105086470930SIngo Molnar assert(fd[i][counter] >= 0); 105186470930SIngo Molnar fcntl(fd[i][counter], F_SETFL, O_NONBLOCK); 105286470930SIngo Molnar 105386470930SIngo Molnar /* 105486470930SIngo Molnar * First counter acts as the group leader: 105586470930SIngo Molnar */ 105686470930SIngo Molnar if (group && group_fd == -1) 105786470930SIngo Molnar group_fd = fd[i][counter]; 105886470930SIngo Molnar 105986470930SIngo Molnar event_array[nr_poll].fd = fd[i][counter]; 106086470930SIngo Molnar event_array[nr_poll].events = POLLIN; 106186470930SIngo Molnar nr_poll++; 106286470930SIngo Molnar 106386470930SIngo Molnar mmap_array[i][counter].counter = counter; 106486470930SIngo Molnar mmap_array[i][counter].prev = 0; 106586470930SIngo Molnar mmap_array[i][counter].mask = mmap_pages*page_size - 1; 106686470930SIngo Molnar mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size, 106786470930SIngo Molnar PROT_READ, MAP_SHARED, fd[i][counter], 0); 106886470930SIngo Molnar if (mmap_array[i][counter].base == MAP_FAILED) 106986470930SIngo Molnar die("failed to mmap with %d (%s)\n", errno, strerror(errno)); 107086470930SIngo Molnar } 1071716c69feSIngo Molnar 1072716c69feSIngo Molnar static int __cmd_top(void) 1073716c69feSIngo Molnar { 1074716c69feSIngo Molnar pthread_t thread; 1075716c69feSIngo Molnar int i, counter; 1076716c69feSIngo Molnar int ret; 1077716c69feSIngo Molnar 1078716c69feSIngo Molnar for (i = 0; i < nr_cpus; i++) { 1079716c69feSIngo Molnar group_fd = -1; 1080716c69feSIngo Molnar for (counter = 0; counter < nr_counters; counter++) 1081716c69feSIngo Molnar start_counter(i, counter); 108286470930SIngo Molnar } 108386470930SIngo Molnar 10842f01190aSFrederic Weisbecker /* Wait for a minimal set of events before starting the snapshot */ 10852f01190aSFrederic Weisbecker poll(event_array, nr_poll, 100); 10862f01190aSFrederic Weisbecker 10872f01190aSFrederic Weisbecker mmap_read(); 10882f01190aSFrederic Weisbecker 108986470930SIngo Molnar if (pthread_create(&thread, NULL, display_thread, NULL)) { 109086470930SIngo Molnar printf("Could not create display thread.\n"); 109186470930SIngo Molnar exit(-1); 109286470930SIngo Molnar } 109386470930SIngo Molnar 109486470930SIngo Molnar if (realtime_prio) { 109586470930SIngo Molnar struct sched_param param; 109686470930SIngo Molnar 109786470930SIngo Molnar param.sched_priority = realtime_prio; 109886470930SIngo Molnar if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 109986470930SIngo Molnar printf("Could not set realtime priority.\n"); 110086470930SIngo Molnar exit(-1); 110186470930SIngo Molnar } 110286470930SIngo Molnar } 110386470930SIngo Molnar 110486470930SIngo Molnar while (1) { 110586470930SIngo Molnar int hits = samples; 110686470930SIngo Molnar 11072f01190aSFrederic Weisbecker mmap_read(); 110886470930SIngo Molnar 110986470930SIngo Molnar if (hits == samples) 111086470930SIngo Molnar ret = poll(event_array, nr_poll, 100); 111186470930SIngo Molnar } 111286470930SIngo Molnar 111386470930SIngo Molnar return 0; 111486470930SIngo Molnar } 111586470930SIngo Molnar 111686470930SIngo Molnar static const char * const top_usage[] = { 111786470930SIngo Molnar "perf top [<options>]", 111886470930SIngo Molnar NULL 111986470930SIngo Molnar }; 112086470930SIngo Molnar 112186470930SIngo Molnar static const struct option options[] = { 112286470930SIngo Molnar OPT_CALLBACK('e', "event", NULL, "event", 112386470930SIngo Molnar "event selector. use 'perf list' to list available events", 112486470930SIngo Molnar parse_events), 112586470930SIngo Molnar OPT_INTEGER('c', "count", &default_interval, 112686470930SIngo Molnar "event period to sample"), 112786470930SIngo Molnar OPT_INTEGER('p', "pid", &target_pid, 112886470930SIngo Molnar "profile events on existing pid"), 112986470930SIngo Molnar OPT_BOOLEAN('a', "all-cpus", &system_wide, 113086470930SIngo Molnar "system-wide collection from all CPUs"), 113186470930SIngo Molnar OPT_INTEGER('C', "CPU", &profile_cpu, 113286470930SIngo Molnar "CPU to profile on"), 113383a0944fSIngo Molnar OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"), 113486470930SIngo Molnar OPT_INTEGER('m', "mmap-pages", &mmap_pages, 113586470930SIngo Molnar "number of mmap data pages"), 113686470930SIngo Molnar OPT_INTEGER('r', "realtime", &realtime_prio, 113786470930SIngo Molnar "collect data with this RT SCHED_FIFO priority"), 113886470930SIngo Molnar OPT_INTEGER('d', "delay", &delay_secs, 113986470930SIngo Molnar "number of seconds to delay between refreshes"), 114086470930SIngo Molnar OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, 114186470930SIngo Molnar "dump the symbol table used for profiling"), 114286470930SIngo Molnar OPT_INTEGER('f', "count-filter", &count_filter, 114386470930SIngo Molnar "only display functions with more events than this"), 114486470930SIngo Molnar OPT_BOOLEAN('g', "group", &group, 114586470930SIngo Molnar "put the counters into a counter group"), 11460fdc7e67SMike Galbraith OPT_BOOLEAN('i', "inherit", &inherit, 11470fdc7e67SMike Galbraith "child tasks inherit counters"), 1148923c42c1SMike Galbraith OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name", 1149923c42c1SMike Galbraith "symbol to annotate - requires -k option"), 11501f208ea6SAnton Blanchard OPT_BOOLEAN('z', "zero", &zero, 115186470930SIngo Molnar "zero history across updates"), 115286470930SIngo Molnar OPT_INTEGER('F', "freq", &freq, 115386470930SIngo Molnar "profile at this frequency"), 115486470930SIngo Molnar OPT_INTEGER('E', "entries", &print_entries, 115586470930SIngo Molnar "display this many functions"), 11563da297a6SIngo Molnar OPT_BOOLEAN('v', "verbose", &verbose, 11573da297a6SIngo Molnar "be more verbose (show counter open errors, etc)"), 115886470930SIngo Molnar OPT_END() 115986470930SIngo Molnar }; 116086470930SIngo Molnar 1161f37a291cSIngo Molnar int cmd_top(int argc, const char **argv, const char *prefix __used) 116286470930SIngo Molnar { 116386470930SIngo Molnar int counter; 116486470930SIngo Molnar 116542976487SMike Galbraith symbol__init(); 116642976487SMike Galbraith 116786470930SIngo Molnar page_size = sysconf(_SC_PAGE_SIZE); 116886470930SIngo Molnar 116986470930SIngo Molnar argc = parse_options(argc, argv, options, top_usage, 0); 117086470930SIngo Molnar if (argc) 117186470930SIngo Molnar usage_with_options(top_usage, options); 117286470930SIngo Molnar 117386470930SIngo Molnar if (freq) { 117486470930SIngo Molnar default_interval = freq; 117586470930SIngo Molnar freq = 1; 117686470930SIngo Molnar } 117786470930SIngo Molnar 117886470930SIngo Molnar /* CPU and PID are mutually exclusive */ 117986470930SIngo Molnar if (target_pid != -1 && profile_cpu != -1) { 118086470930SIngo Molnar printf("WARNING: PID switch overriding CPU\n"); 118186470930SIngo Molnar sleep(1); 118286470930SIngo Molnar profile_cpu = -1; 118386470930SIngo Molnar } 118486470930SIngo Molnar 118586470930SIngo Molnar if (!nr_counters) 118686470930SIngo Molnar nr_counters = 1; 118786470930SIngo Molnar 118886470930SIngo Molnar if (delay_secs < 1) 118986470930SIngo Molnar delay_secs = 1; 119086470930SIngo Molnar 119186470930SIngo Molnar parse_symbols(); 1192923c42c1SMike Galbraith parse_source(sym_filter_entry); 119386470930SIngo Molnar 119486470930SIngo Molnar /* 119586470930SIngo Molnar * Fill in the ones not specifically initialized via -c: 119686470930SIngo Molnar */ 119786470930SIngo Molnar for (counter = 0; counter < nr_counters; counter++) { 119886470930SIngo Molnar if (attrs[counter].sample_period) 119986470930SIngo Molnar continue; 120086470930SIngo Molnar 120186470930SIngo Molnar attrs[counter].sample_period = default_interval; 120286470930SIngo Molnar } 120386470930SIngo Molnar 120486470930SIngo Molnar nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); 120586470930SIngo Molnar assert(nr_cpus <= MAX_NR_CPUS); 120686470930SIngo Molnar assert(nr_cpus >= 0); 120786470930SIngo Molnar 120886470930SIngo Molnar if (target_pid != -1 || profile_cpu != -1) 120986470930SIngo Molnar nr_cpus = 1; 121086470930SIngo Molnar 121186470930SIngo Molnar return __cmd_top(); 121286470930SIngo Molnar } 1213