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 3086470930SIngo Molnar #include <assert.h> 3186470930SIngo Molnar #include <fcntl.h> 3286470930SIngo Molnar 3386470930SIngo Molnar #include <stdio.h> 34923c42c1SMike Galbraith #include <termios.h> 35923c42c1SMike Galbraith #include <unistd.h> 3686470930SIngo Molnar 3786470930SIngo Molnar #include <errno.h> 3886470930SIngo Molnar #include <time.h> 3986470930SIngo Molnar #include <sched.h> 4086470930SIngo Molnar #include <pthread.h> 4186470930SIngo Molnar 4286470930SIngo Molnar #include <sys/syscall.h> 4386470930SIngo Molnar #include <sys/ioctl.h> 4486470930SIngo Molnar #include <sys/poll.h> 4586470930SIngo Molnar #include <sys/prctl.h> 4686470930SIngo Molnar #include <sys/wait.h> 4786470930SIngo Molnar #include <sys/uio.h> 4886470930SIngo Molnar #include <sys/mman.h> 4986470930SIngo Molnar 5086470930SIngo Molnar #include <linux/unistd.h> 5186470930SIngo Molnar #include <linux/types.h> 5286470930SIngo Molnar 5386470930SIngo Molnar static int fd[MAX_NR_CPUS][MAX_COUNTERS]; 5486470930SIngo Molnar 5586470930SIngo Molnar static int system_wide = 0; 5686470930SIngo Molnar 5786470930SIngo Molnar static int default_interval = 100000; 5886470930SIngo Molnar 59923c42c1SMike Galbraith static int count_filter = 5; 6086470930SIngo Molnar static int print_entries = 15; 6186470930SIngo Molnar 6286470930SIngo Molnar static int target_pid = -1; 630fdc7e67SMike Galbraith static int inherit = 0; 6486470930SIngo Molnar static int profile_cpu = -1; 6586470930SIngo Molnar static int nr_cpus = 0; 6686470930SIngo Molnar static unsigned int realtime_prio = 0; 6786470930SIngo Molnar static int group = 0; 6886470930SIngo Molnar static unsigned int page_size; 6986470930SIngo Molnar static unsigned int mmap_pages = 16; 7086470930SIngo Molnar static int freq = 0; 713da297a6SIngo Molnar static int verbose = 0; 7242976487SMike Galbraith static char *vmlinux = NULL; 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; 125923c42c1SMike Galbraith char command[PATH_MAX*2], *path = vmlinux; 126923c42c1SMike Galbraith u64 start, end, len; 127923c42c1SMike Galbraith 128923c42c1SMike Galbraith if (!syme) 129923c42c1SMike Galbraith return; 130923c42c1SMike Galbraith 131923c42c1SMike Galbraith if (syme->lines) { 132923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 133923c42c1SMike Galbraith goto out_assign; 134923c42c1SMike Galbraith } 135923c42c1SMike Galbraith 136923c42c1SMike Galbraith sym = (struct symbol *)(syme + 1); 137923c42c1SMike Galbraith module = sym->module; 138923c42c1SMike Galbraith 139923c42c1SMike Galbraith if (module) 140923c42c1SMike Galbraith path = module->path; 141923c42c1SMike Galbraith if (!path) 142923c42c1SMike Galbraith return; 143923c42c1SMike Galbraith 144923c42c1SMike Galbraith start = sym->obj_start; 145923c42c1SMike Galbraith if (!start) 146923c42c1SMike Galbraith start = sym->start; 147923c42c1SMike Galbraith 148923c42c1SMike Galbraith if (module) { 149923c42c1SMike Galbraith section = module->sections->find_section(module->sections, ".text"); 150923c42c1SMike Galbraith if (section) 151923c42c1SMike Galbraith start -= section->vma; 152923c42c1SMike Galbraith } 153923c42c1SMike Galbraith 154923c42c1SMike Galbraith end = start + sym->end - sym->start + 1; 155923c42c1SMike Galbraith len = sym->end - sym->start; 156923c42c1SMike Galbraith 157923c42c1SMike Galbraith sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", start, end, path); 158923c42c1SMike Galbraith 159923c42c1SMike Galbraith file = popen(command, "r"); 160923c42c1SMike Galbraith if (!file) 161923c42c1SMike Galbraith return; 162923c42c1SMike Galbraith 163923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 164923c42c1SMike Galbraith syme->lines_tail = &syme->lines; 165923c42c1SMike Galbraith while (!feof(file)) { 166923c42c1SMike Galbraith struct source_line *src; 167923c42c1SMike Galbraith size_t dummy = 0; 168923c42c1SMike Galbraith char *c; 169923c42c1SMike Galbraith 170923c42c1SMike Galbraith src = malloc(sizeof(struct source_line)); 171923c42c1SMike Galbraith assert(src != NULL); 172923c42c1SMike Galbraith memset(src, 0, sizeof(struct source_line)); 173923c42c1SMike Galbraith 174923c42c1SMike Galbraith if (getline(&src->line, &dummy, file) < 0) 175923c42c1SMike Galbraith break; 176923c42c1SMike Galbraith if (!src->line) 177923c42c1SMike Galbraith break; 178923c42c1SMike Galbraith 179923c42c1SMike Galbraith c = strchr(src->line, '\n'); 180923c42c1SMike Galbraith if (c) 181923c42c1SMike Galbraith *c = 0; 182923c42c1SMike Galbraith 183923c42c1SMike Galbraith src->next = NULL; 184923c42c1SMike Galbraith *syme->lines_tail = src; 185923c42c1SMike Galbraith syme->lines_tail = &src->next; 186923c42c1SMike Galbraith 187923c42c1SMike Galbraith if (strlen(src->line)>8 && src->line[8] == ':') { 188923c42c1SMike Galbraith src->eip = strtoull(src->line, NULL, 16); 189923c42c1SMike Galbraith if (section) 190923c42c1SMike Galbraith src->eip += section->vma; 191923c42c1SMike Galbraith } 192923c42c1SMike Galbraith if (strlen(src->line)>8 && src->line[16] == ':') { 193923c42c1SMike Galbraith src->eip = strtoull(src->line, NULL, 16); 194923c42c1SMike Galbraith if (section) 195923c42c1SMike Galbraith src->eip += section->vma; 196923c42c1SMike Galbraith } 197923c42c1SMike Galbraith } 198923c42c1SMike Galbraith pclose(file); 199923c42c1SMike Galbraith out_assign: 200923c42c1SMike Galbraith sym_filter_entry = syme; 201923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 202923c42c1SMike Galbraith } 203923c42c1SMike Galbraith 204923c42c1SMike Galbraith static void __zero_source_counters(struct sym_entry *syme) 205923c42c1SMike Galbraith { 206923c42c1SMike Galbraith int i; 207923c42c1SMike Galbraith struct source_line *line; 208923c42c1SMike Galbraith 209923c42c1SMike Galbraith line = syme->lines; 210923c42c1SMike Galbraith while (line) { 211923c42c1SMike Galbraith for (i = 0; i < nr_counters; i++) 212923c42c1SMike Galbraith line->count[i] = 0; 213923c42c1SMike Galbraith line = line->next; 214923c42c1SMike Galbraith } 215923c42c1SMike Galbraith } 216923c42c1SMike Galbraith 217923c42c1SMike Galbraith static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip) 218923c42c1SMike Galbraith { 219923c42c1SMike Galbraith struct source_line *line; 220923c42c1SMike Galbraith 221923c42c1SMike Galbraith if (syme != sym_filter_entry) 222923c42c1SMike Galbraith return; 223923c42c1SMike Galbraith 224923c42c1SMike Galbraith if (pthread_mutex_trylock(&syme->source_lock)) 225923c42c1SMike Galbraith return; 226923c42c1SMike Galbraith 227923c42c1SMike Galbraith if (!syme->source) 228923c42c1SMike Galbraith goto out_unlock; 229923c42c1SMike Galbraith 230923c42c1SMike Galbraith for (line = syme->lines; line; line = line->next) { 231923c42c1SMike Galbraith if (line->eip == ip) { 232923c42c1SMike Galbraith line->count[counter]++; 233923c42c1SMike Galbraith break; 234923c42c1SMike Galbraith } 235923c42c1SMike Galbraith if (line->eip > ip) 236923c42c1SMike Galbraith break; 237923c42c1SMike Galbraith } 238923c42c1SMike Galbraith out_unlock: 239923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 240923c42c1SMike Galbraith } 241923c42c1SMike Galbraith 242923c42c1SMike Galbraith static void lookup_sym_source(struct sym_entry *syme) 243923c42c1SMike Galbraith { 244923c42c1SMike Galbraith struct symbol *symbol = (struct symbol *)(syme + 1); 245923c42c1SMike Galbraith struct source_line *line; 246923c42c1SMike Galbraith char pattern[PATH_MAX]; 247923c42c1SMike Galbraith char *idx; 248923c42c1SMike Galbraith 249923c42c1SMike Galbraith sprintf(pattern, "<%s>:", symbol->name); 250923c42c1SMike Galbraith 251923c42c1SMike Galbraith if (symbol->module) { 252923c42c1SMike Galbraith idx = strstr(pattern, "\t"); 253923c42c1SMike Galbraith if (idx) 254923c42c1SMike Galbraith *idx = 0; 255923c42c1SMike Galbraith } 256923c42c1SMike Galbraith 257923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 258923c42c1SMike Galbraith for (line = syme->lines; line; line = line->next) { 259923c42c1SMike Galbraith if (strstr(line->line, pattern)) { 260923c42c1SMike Galbraith syme->source = line; 261923c42c1SMike Galbraith break; 262923c42c1SMike Galbraith } 263923c42c1SMike Galbraith } 264923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 265923c42c1SMike Galbraith } 266923c42c1SMike Galbraith 267923c42c1SMike Galbraith static void show_lines(struct source_line *queue, int count, int total) 268923c42c1SMike Galbraith { 269923c42c1SMike Galbraith int i; 270923c42c1SMike Galbraith struct source_line *line; 271923c42c1SMike Galbraith 272923c42c1SMike Galbraith line = queue; 273923c42c1SMike Galbraith for (i = 0; i < count; i++) { 274923c42c1SMike Galbraith float pcnt = 100.0*(float)line->count[sym_counter]/(float)total; 275923c42c1SMike Galbraith 276923c42c1SMike Galbraith printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line); 277923c42c1SMike Galbraith line = line->next; 278923c42c1SMike Galbraith } 279923c42c1SMike Galbraith } 280923c42c1SMike Galbraith 281923c42c1SMike Galbraith #define TRACE_COUNT 3 282923c42c1SMike Galbraith 283923c42c1SMike Galbraith static void show_details(struct sym_entry *syme) 284923c42c1SMike Galbraith { 285923c42c1SMike Galbraith struct symbol *symbol; 286923c42c1SMike Galbraith struct source_line *line; 287923c42c1SMike Galbraith struct source_line *line_queue = NULL; 288923c42c1SMike Galbraith int displayed = 0; 289923c42c1SMike Galbraith int line_queue_count = 0, total = 0, more = 0; 290923c42c1SMike Galbraith 291923c42c1SMike Galbraith if (!syme) 292923c42c1SMike Galbraith return; 293923c42c1SMike Galbraith 294923c42c1SMike Galbraith if (!syme->source) 295923c42c1SMike Galbraith lookup_sym_source(syme); 296923c42c1SMike Galbraith 297923c42c1SMike Galbraith if (!syme->source) 298923c42c1SMike Galbraith return; 299923c42c1SMike Galbraith 300923c42c1SMike Galbraith symbol = (struct symbol *)(syme + 1); 301923c42c1SMike Galbraith printf("Showing %s for %s\n", event_name(sym_counter), symbol->name); 302923c42c1SMike Galbraith printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter); 303923c42c1SMike Galbraith 304923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 305923c42c1SMike Galbraith line = syme->source; 306923c42c1SMike Galbraith while (line) { 307923c42c1SMike Galbraith total += line->count[sym_counter]; 308923c42c1SMike Galbraith line = line->next; 309923c42c1SMike Galbraith } 310923c42c1SMike Galbraith 311923c42c1SMike Galbraith line = syme->source; 312923c42c1SMike Galbraith while (line) { 313923c42c1SMike Galbraith float pcnt = 0.0; 314923c42c1SMike Galbraith 315923c42c1SMike Galbraith if (!line_queue_count) 316923c42c1SMike Galbraith line_queue = line; 317923c42c1SMike Galbraith line_queue_count++; 318923c42c1SMike Galbraith 319923c42c1SMike Galbraith if (line->count[sym_counter]) 320923c42c1SMike Galbraith pcnt = 100.0 * line->count[sym_counter] / (float)total; 321923c42c1SMike Galbraith if (pcnt >= (float)sym_pcnt_filter) { 322923c42c1SMike Galbraith if (displayed <= print_entries) 323923c42c1SMike Galbraith show_lines(line_queue, line_queue_count, total); 324923c42c1SMike Galbraith else more++; 325923c42c1SMike Galbraith displayed += line_queue_count; 326923c42c1SMike Galbraith line_queue_count = 0; 327923c42c1SMike Galbraith line_queue = NULL; 328923c42c1SMike Galbraith } else if (line_queue_count > TRACE_COUNT) { 329923c42c1SMike Galbraith line_queue = line_queue->next; 330923c42c1SMike Galbraith line_queue_count--; 331923c42c1SMike Galbraith } 332923c42c1SMike Galbraith 333923c42c1SMike Galbraith line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8; 334923c42c1SMike Galbraith line = line->next; 335923c42c1SMike Galbraith } 336923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 337923c42c1SMike Galbraith if (more) 338923c42c1SMike Galbraith printf("%d lines not displayed, maybe increase display entries [e]\n", more); 339923c42c1SMike Galbraith } 34086470930SIngo Molnar 34186470930SIngo Molnar struct dso *kernel_dso; 34286470930SIngo Molnar 34386470930SIngo Molnar /* 34486470930SIngo Molnar * Symbols will be added here in record_ip and will get out 34586470930SIngo Molnar * after decayed. 34686470930SIngo Molnar */ 34786470930SIngo Molnar static LIST_HEAD(active_symbols); 34886470930SIngo Molnar static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER; 34986470930SIngo Molnar 35086470930SIngo Molnar /* 35186470930SIngo Molnar * Ordering weight: count-1 * count-2 * ... / count-n 35286470930SIngo Molnar */ 35386470930SIngo Molnar static double sym_weight(const struct sym_entry *sym) 35486470930SIngo Molnar { 35586470930SIngo Molnar double weight = sym->snap_count; 35686470930SIngo Molnar int counter; 35786470930SIngo Molnar 35846ab9764SMike Galbraith if (!display_weighted) 35946ab9764SMike Galbraith return weight; 36046ab9764SMike Galbraith 36186470930SIngo Molnar for (counter = 1; counter < nr_counters-1; counter++) 36286470930SIngo Molnar weight *= sym->count[counter]; 36386470930SIngo Molnar 36486470930SIngo Molnar weight /= (sym->count[counter] + 1); 36586470930SIngo Molnar 36686470930SIngo Molnar return weight; 36786470930SIngo Molnar } 36886470930SIngo Molnar 36986470930SIngo Molnar static long samples; 37086470930SIngo Molnar static long userspace_samples; 37186470930SIngo Molnar static const char CONSOLE_CLEAR[] = "[H[2J"; 37286470930SIngo Molnar 37386470930SIngo Molnar static void __list_insert_active_sym(struct sym_entry *syme) 37486470930SIngo Molnar { 37586470930SIngo Molnar list_add(&syme->node, &active_symbols); 37686470930SIngo Molnar } 37786470930SIngo Molnar 37886470930SIngo Molnar static void list_remove_active_sym(struct sym_entry *syme) 37986470930SIngo Molnar { 38086470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 38186470930SIngo Molnar list_del_init(&syme->node); 38286470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 38386470930SIngo Molnar } 38486470930SIngo Molnar 38586470930SIngo Molnar static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se) 38686470930SIngo Molnar { 38786470930SIngo Molnar struct rb_node **p = &tree->rb_node; 38886470930SIngo Molnar struct rb_node *parent = NULL; 38986470930SIngo Molnar struct sym_entry *iter; 39086470930SIngo Molnar 39186470930SIngo Molnar while (*p != NULL) { 39286470930SIngo Molnar parent = *p; 39386470930SIngo Molnar iter = rb_entry(parent, struct sym_entry, rb_node); 39486470930SIngo Molnar 39586470930SIngo Molnar if (se->weight > iter->weight) 39686470930SIngo Molnar p = &(*p)->rb_left; 39786470930SIngo Molnar else 39886470930SIngo Molnar p = &(*p)->rb_right; 39986470930SIngo Molnar } 40086470930SIngo Molnar 40186470930SIngo Molnar rb_link_node(&se->rb_node, parent, p); 40286470930SIngo Molnar rb_insert_color(&se->rb_node, tree); 40386470930SIngo Molnar } 40486470930SIngo Molnar 40586470930SIngo Molnar static void print_sym_table(void) 40686470930SIngo Molnar { 40786470930SIngo Molnar int printed = 0, j; 40846ab9764SMike Galbraith int counter, snap = !display_weighted ? sym_counter : 0; 40986470930SIngo Molnar float samples_per_sec = samples/delay_secs; 41086470930SIngo Molnar float ksamples_per_sec = (samples-userspace_samples)/delay_secs; 41186470930SIngo Molnar float sum_ksamples = 0.0; 41286470930SIngo Molnar struct sym_entry *syme, *n; 41386470930SIngo Molnar struct rb_root tmp = RB_ROOT; 41486470930SIngo Molnar struct rb_node *nd; 41586470930SIngo Molnar 41686470930SIngo Molnar samples = userspace_samples = 0; 41786470930SIngo Molnar 41886470930SIngo Molnar /* Sort the active symbols */ 41986470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 42086470930SIngo Molnar syme = list_entry(active_symbols.next, struct sym_entry, node); 42186470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 42286470930SIngo Molnar 42386470930SIngo Molnar list_for_each_entry_safe_from(syme, n, &active_symbols, node) { 42446ab9764SMike Galbraith syme->snap_count = syme->count[snap]; 42586470930SIngo Molnar if (syme->snap_count != 0) { 42686470930SIngo Molnar syme->weight = sym_weight(syme); 42786470930SIngo Molnar rb_insert_active_sym(&tmp, syme); 42886470930SIngo Molnar sum_ksamples += syme->snap_count; 42986470930SIngo Molnar 43086470930SIngo Molnar for (j = 0; j < nr_counters; j++) 43186470930SIngo Molnar syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8; 43286470930SIngo Molnar } else 43386470930SIngo Molnar list_remove_active_sym(syme); 43486470930SIngo Molnar } 43586470930SIngo Molnar 43686470930SIngo Molnar puts(CONSOLE_CLEAR); 43786470930SIngo Molnar 43886470930SIngo Molnar printf( 43986470930SIngo Molnar "------------------------------------------------------------------------------\n"); 44086470930SIngo Molnar printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [", 44186470930SIngo Molnar samples_per_sec, 44286470930SIngo Molnar 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec))); 44386470930SIngo Molnar 44446ab9764SMike Galbraith if (nr_counters == 1 || !display_weighted) { 4459cffa8d5SPaul Mackerras printf("%Ld", (u64)attrs[0].sample_period); 44686470930SIngo Molnar if (freq) 44786470930SIngo Molnar printf("Hz "); 44886470930SIngo Molnar else 44986470930SIngo Molnar printf(" "); 45086470930SIngo Molnar } 45186470930SIngo Molnar 45246ab9764SMike Galbraith if (!display_weighted) 45346ab9764SMike Galbraith printf("%s", event_name(sym_counter)); 45446ab9764SMike Galbraith else for (counter = 0; counter < nr_counters; counter++) { 45586470930SIngo Molnar if (counter) 45686470930SIngo Molnar printf("/"); 45786470930SIngo Molnar 45886470930SIngo Molnar printf("%s", event_name(counter)); 45986470930SIngo Molnar } 46086470930SIngo Molnar 46186470930SIngo Molnar printf( "], "); 46286470930SIngo Molnar 46386470930SIngo Molnar if (target_pid != -1) 46486470930SIngo Molnar printf(" (target_pid: %d", target_pid); 46586470930SIngo Molnar else 46686470930SIngo Molnar printf(" (all"); 46786470930SIngo Molnar 46886470930SIngo Molnar if (profile_cpu != -1) 46986470930SIngo Molnar printf(", cpu: %d)\n", profile_cpu); 47086470930SIngo Molnar else { 47186470930SIngo Molnar if (target_pid != -1) 47286470930SIngo Molnar printf(")\n"); 47386470930SIngo Molnar else 47486470930SIngo Molnar printf(", %d CPUs)\n", nr_cpus); 47586470930SIngo Molnar } 47686470930SIngo Molnar 47786470930SIngo Molnar printf("------------------------------------------------------------------------------\n\n"); 47886470930SIngo Molnar 479923c42c1SMike Galbraith if (sym_filter_entry) { 480923c42c1SMike Galbraith show_details(sym_filter_entry); 481923c42c1SMike Galbraith return; 482923c42c1SMike Galbraith } 483923c42c1SMike Galbraith 48486470930SIngo Molnar if (nr_counters == 1) 48586470930SIngo Molnar printf(" samples pcnt"); 48686470930SIngo Molnar else 48786470930SIngo Molnar printf(" weight samples pcnt"); 48886470930SIngo Molnar 48986470930SIngo Molnar printf(" RIP kernel function\n" 49086470930SIngo Molnar " ______ _______ _____ ________________ _______________\n\n" 49186470930SIngo Molnar ); 49286470930SIngo Molnar 49386470930SIngo Molnar for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { 49486470930SIngo Molnar struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node); 49586470930SIngo Molnar struct symbol *sym = (struct symbol *)(syme + 1); 49686470930SIngo Molnar double pcnt; 49786470930SIngo Molnar 498923c42c1SMike Galbraith if (++printed > print_entries || (int)syme->snap_count < count_filter) 49986470930SIngo Molnar continue; 50086470930SIngo Molnar 50186470930SIngo Molnar pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / 50286470930SIngo Molnar sum_ksamples)); 50386470930SIngo Molnar 50446ab9764SMike Galbraith if (nr_counters == 1 || !display_weighted) 50586470930SIngo Molnar printf("%20.2f - ", syme->weight); 50686470930SIngo Molnar else 50786470930SIngo Molnar printf("%9.1f %10ld - ", syme->weight, syme->snap_count); 50886470930SIngo Molnar 5091e11fd82SFrederic Weisbecker percent_color_fprintf(stdout, "%4.1f%%", pcnt); 51042976487SMike Galbraith printf(" - %016llx : %s", sym->start, sym->name); 51142976487SMike Galbraith if (sym->module) 51242976487SMike Galbraith printf("\t[%s]", sym->module->name); 51342976487SMike Galbraith printf("\n"); 51486470930SIngo Molnar } 51586470930SIngo Molnar } 51686470930SIngo Molnar 517923c42c1SMike Galbraith static void prompt_integer(int *target, const char *msg) 518923c42c1SMike Galbraith { 519923c42c1SMike Galbraith char *buf = malloc(0), *p; 520923c42c1SMike Galbraith size_t dummy = 0; 521923c42c1SMike Galbraith int tmp; 522923c42c1SMike Galbraith 523923c42c1SMike Galbraith fprintf(stdout, "\n%s: ", msg); 524923c42c1SMike Galbraith if (getline(&buf, &dummy, stdin) < 0) 525923c42c1SMike Galbraith return; 526923c42c1SMike Galbraith 527923c42c1SMike Galbraith p = strchr(buf, '\n'); 528923c42c1SMike Galbraith if (p) 529923c42c1SMike Galbraith *p = 0; 530923c42c1SMike Galbraith 531923c42c1SMike Galbraith p = buf; 532923c42c1SMike Galbraith while(*p) { 533923c42c1SMike Galbraith if (!isdigit(*p)) 534923c42c1SMike Galbraith goto out_free; 535923c42c1SMike Galbraith p++; 536923c42c1SMike Galbraith } 537923c42c1SMike Galbraith tmp = strtoul(buf, NULL, 10); 538923c42c1SMike Galbraith *target = tmp; 539923c42c1SMike Galbraith out_free: 540923c42c1SMike Galbraith free(buf); 541923c42c1SMike Galbraith } 542923c42c1SMike Galbraith 543923c42c1SMike Galbraith static void prompt_percent(int *target, const char *msg) 544923c42c1SMike Galbraith { 545923c42c1SMike Galbraith int tmp = 0; 546923c42c1SMike Galbraith 547923c42c1SMike Galbraith prompt_integer(&tmp, msg); 548923c42c1SMike Galbraith if (tmp >= 0 && tmp <= 100) 549923c42c1SMike Galbraith *target = tmp; 550923c42c1SMike Galbraith } 551923c42c1SMike Galbraith 552923c42c1SMike Galbraith static void prompt_symbol(struct sym_entry **target, const char *msg) 553923c42c1SMike Galbraith { 554923c42c1SMike Galbraith char *buf = malloc(0), *p; 555923c42c1SMike Galbraith struct sym_entry *syme = *target, *n, *found = NULL; 556923c42c1SMike Galbraith size_t dummy = 0; 557923c42c1SMike Galbraith 558923c42c1SMike Galbraith /* zero counters of active symbol */ 559923c42c1SMike Galbraith if (syme) { 560923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 561923c42c1SMike Galbraith __zero_source_counters(syme); 562923c42c1SMike Galbraith *target = NULL; 563923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 564923c42c1SMike Galbraith } 565923c42c1SMike Galbraith 566923c42c1SMike Galbraith fprintf(stdout, "\n%s: ", msg); 567923c42c1SMike Galbraith if (getline(&buf, &dummy, stdin) < 0) 568923c42c1SMike Galbraith goto out_free; 569923c42c1SMike Galbraith 570923c42c1SMike Galbraith p = strchr(buf, '\n'); 571923c42c1SMike Galbraith if (p) 572923c42c1SMike Galbraith *p = 0; 573923c42c1SMike Galbraith 574923c42c1SMike Galbraith pthread_mutex_lock(&active_symbols_lock); 575923c42c1SMike Galbraith syme = list_entry(active_symbols.next, struct sym_entry, node); 576923c42c1SMike Galbraith pthread_mutex_unlock(&active_symbols_lock); 577923c42c1SMike Galbraith 578923c42c1SMike Galbraith list_for_each_entry_safe_from(syme, n, &active_symbols, node) { 579923c42c1SMike Galbraith struct symbol *sym = (struct symbol *)(syme + 1); 580923c42c1SMike Galbraith 581923c42c1SMike Galbraith if (!strcmp(buf, sym->name)) { 582923c42c1SMike Galbraith found = syme; 583923c42c1SMike Galbraith break; 584923c42c1SMike Galbraith } 585923c42c1SMike Galbraith } 586923c42c1SMike Galbraith 587923c42c1SMike Galbraith if (!found) { 588923c42c1SMike Galbraith fprintf(stderr, "Sorry, %s is not active.\n", sym_filter); 589923c42c1SMike Galbraith sleep(1); 590923c42c1SMike Galbraith return; 591923c42c1SMike Galbraith } else 592923c42c1SMike Galbraith parse_source(found); 593923c42c1SMike Galbraith 594923c42c1SMike Galbraith out_free: 595923c42c1SMike Galbraith free(buf); 596923c42c1SMike Galbraith } 597923c42c1SMike Galbraith 598091bd2e9SMike Galbraith static void print_mapped_keys(void) 599923c42c1SMike Galbraith { 600091bd2e9SMike Galbraith char *name = NULL; 601091bd2e9SMike Galbraith 602091bd2e9SMike Galbraith if (sym_filter_entry) { 603091bd2e9SMike Galbraith struct symbol *sym = (struct symbol *)(sym_filter_entry+1); 604091bd2e9SMike Galbraith name = sym->name; 605091bd2e9SMike Galbraith } 606091bd2e9SMike Galbraith 607091bd2e9SMike Galbraith fprintf(stdout, "\nMapped keys:\n"); 608091bd2e9SMike Galbraith fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs); 609091bd2e9SMike Galbraith fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries); 610091bd2e9SMike Galbraith 611091bd2e9SMike Galbraith if (nr_counters > 1) 61246ab9764SMike Galbraith fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter)); 613091bd2e9SMike Galbraith 614091bd2e9SMike Galbraith fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter); 615091bd2e9SMike Galbraith 616091bd2e9SMike Galbraith if (vmlinux) { 617091bd2e9SMike Galbraith fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter); 618091bd2e9SMike Galbraith fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 619091bd2e9SMike Galbraith fprintf(stdout, "\t[S] stop annotation.\n"); 620091bd2e9SMike Galbraith } 621091bd2e9SMike Galbraith 622091bd2e9SMike Galbraith if (nr_counters > 1) 62346ab9764SMike Galbraith fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0); 624091bd2e9SMike Galbraith 62546ab9764SMike Galbraith fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0); 626091bd2e9SMike Galbraith fprintf(stdout, "\t[qQ] quit.\n"); 627091bd2e9SMike Galbraith } 628091bd2e9SMike Galbraith 629091bd2e9SMike Galbraith static int key_mapped(int c) 630091bd2e9SMike Galbraith { 631091bd2e9SMike Galbraith switch (c) { 632091bd2e9SMike Galbraith case 'd': 633091bd2e9SMike Galbraith case 'e': 634091bd2e9SMike Galbraith case 'f': 635091bd2e9SMike Galbraith case 'z': 636091bd2e9SMike Galbraith case 'q': 637091bd2e9SMike Galbraith case 'Q': 638091bd2e9SMike Galbraith return 1; 639091bd2e9SMike Galbraith case 'E': 640091bd2e9SMike Galbraith case 'w': 641091bd2e9SMike Galbraith return nr_counters > 1 ? 1 : 0; 642091bd2e9SMike Galbraith case 'F': 643091bd2e9SMike Galbraith case 's': 644091bd2e9SMike Galbraith case 'S': 645091bd2e9SMike Galbraith return vmlinux ? 1 : 0; 646091bd2e9SMike Galbraith } 647091bd2e9SMike Galbraith 648091bd2e9SMike Galbraith return 0; 649923c42c1SMike Galbraith } 650923c42c1SMike Galbraith 651923c42c1SMike Galbraith static void handle_keypress(int c) 652923c42c1SMike Galbraith { 653091bd2e9SMike Galbraith if (!key_mapped(c)) { 654091bd2e9SMike Galbraith struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 655091bd2e9SMike Galbraith struct termios tc, save; 656091bd2e9SMike Galbraith 657091bd2e9SMike Galbraith print_mapped_keys(); 658091bd2e9SMike Galbraith fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 659091bd2e9SMike Galbraith fflush(stdout); 660091bd2e9SMike Galbraith 661091bd2e9SMike Galbraith tcgetattr(0, &save); 662091bd2e9SMike Galbraith tc = save; 663091bd2e9SMike Galbraith tc.c_lflag &= ~(ICANON | ECHO); 664091bd2e9SMike Galbraith tc.c_cc[VMIN] = 0; 665091bd2e9SMike Galbraith tc.c_cc[VTIME] = 0; 666091bd2e9SMike Galbraith tcsetattr(0, TCSANOW, &tc); 667091bd2e9SMike Galbraith 668091bd2e9SMike Galbraith poll(&stdin_poll, 1, -1); 669091bd2e9SMike Galbraith c = getc(stdin); 670091bd2e9SMike Galbraith 671091bd2e9SMike Galbraith tcsetattr(0, TCSAFLUSH, &save); 672091bd2e9SMike Galbraith if (!key_mapped(c)) 673091bd2e9SMike Galbraith return; 674091bd2e9SMike Galbraith } 675091bd2e9SMike Galbraith 676923c42c1SMike Galbraith switch (c) { 677923c42c1SMike Galbraith case 'd': 678923c42c1SMike Galbraith prompt_integer(&delay_secs, "Enter display delay"); 679923c42c1SMike Galbraith break; 680923c42c1SMike Galbraith case 'e': 681923c42c1SMike Galbraith prompt_integer(&print_entries, "Enter display entries (lines)"); 682923c42c1SMike Galbraith break; 683923c42c1SMike Galbraith case 'E': 684923c42c1SMike Galbraith if (nr_counters > 1) { 685923c42c1SMike Galbraith int i; 686923c42c1SMike Galbraith 687923c42c1SMike Galbraith fprintf(stderr, "\nAvailable events:"); 688923c42c1SMike Galbraith for (i = 0; i < nr_counters; i++) 689923c42c1SMike Galbraith fprintf(stderr, "\n\t%d %s", i, event_name(i)); 690923c42c1SMike Galbraith 691923c42c1SMike Galbraith prompt_integer(&sym_counter, "Enter details event counter"); 692923c42c1SMike Galbraith 693923c42c1SMike Galbraith if (sym_counter >= nr_counters) { 694923c42c1SMike Galbraith fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0)); 695923c42c1SMike Galbraith sym_counter = 0; 696923c42c1SMike Galbraith sleep(1); 697923c42c1SMike Galbraith } 698923c42c1SMike Galbraith } else sym_counter = 0; 699923c42c1SMike Galbraith break; 700923c42c1SMike Galbraith case 'f': 701923c42c1SMike Galbraith prompt_integer(&count_filter, "Enter display event count filter"); 702923c42c1SMike Galbraith break; 703923c42c1SMike Galbraith case 'F': 704923c42c1SMike Galbraith prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)"); 705923c42c1SMike Galbraith break; 706923c42c1SMike Galbraith case 'q': 707923c42c1SMike Galbraith case 'Q': 708923c42c1SMike Galbraith printf("exiting.\n"); 709923c42c1SMike Galbraith exit(0); 710923c42c1SMike Galbraith case 's': 711923c42c1SMike Galbraith prompt_symbol(&sym_filter_entry, "Enter details symbol"); 712923c42c1SMike Galbraith break; 713923c42c1SMike Galbraith case 'S': 714923c42c1SMike Galbraith if (!sym_filter_entry) 715923c42c1SMike Galbraith break; 716923c42c1SMike Galbraith else { 717923c42c1SMike Galbraith struct sym_entry *syme = sym_filter_entry; 718923c42c1SMike Galbraith 719923c42c1SMike Galbraith pthread_mutex_lock(&syme->source_lock); 720923c42c1SMike Galbraith sym_filter_entry = NULL; 721923c42c1SMike Galbraith __zero_source_counters(syme); 722923c42c1SMike Galbraith pthread_mutex_unlock(&syme->source_lock); 723923c42c1SMike Galbraith } 724923c42c1SMike Galbraith break; 72546ab9764SMike Galbraith case 'w': 72646ab9764SMike Galbraith display_weighted = ~display_weighted; 72746ab9764SMike Galbraith break; 728923c42c1SMike Galbraith case 'z': 729923c42c1SMike Galbraith zero = ~zero; 730923c42c1SMike Galbraith break; 731923c42c1SMike Galbraith } 732923c42c1SMike Galbraith } 733923c42c1SMike Galbraith 734f37a291cSIngo Molnar static void *display_thread(void *arg __used) 73586470930SIngo Molnar { 73686470930SIngo Molnar struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 737923c42c1SMike Galbraith struct termios tc, save; 738923c42c1SMike Galbraith int delay_msecs, c; 73986470930SIngo Molnar 740923c42c1SMike Galbraith tcgetattr(0, &save); 741923c42c1SMike Galbraith tc = save; 742923c42c1SMike Galbraith tc.c_lflag &= ~(ICANON | ECHO); 743923c42c1SMike Galbraith tc.c_cc[VMIN] = 0; 744923c42c1SMike Galbraith tc.c_cc[VTIME] = 0; 745091bd2e9SMike Galbraith 746923c42c1SMike Galbraith repeat: 747923c42c1SMike Galbraith delay_msecs = delay_secs * 1000; 748923c42c1SMike Galbraith tcsetattr(0, TCSANOW, &tc); 749923c42c1SMike Galbraith /* trash return*/ 750923c42c1SMike Galbraith getc(stdin); 75186470930SIngo Molnar 75286470930SIngo Molnar do { 75386470930SIngo Molnar print_sym_table(); 75486470930SIngo Molnar } while (!poll(&stdin_poll, 1, delay_msecs) == 1); 75586470930SIngo Molnar 756923c42c1SMike Galbraith c = getc(stdin); 757923c42c1SMike Galbraith tcsetattr(0, TCSAFLUSH, &save); 758923c42c1SMike Galbraith 759923c42c1SMike Galbraith handle_keypress(c); 760923c42c1SMike Galbraith goto repeat; 76186470930SIngo Molnar 76286470930SIngo Molnar return NULL; 76386470930SIngo Molnar } 76486470930SIngo Molnar 7652ab52083SAnton Blanchard /* Tag samples to be skipped. */ 766f37a291cSIngo Molnar static const char *skip_symbols[] = { 7672ab52083SAnton Blanchard "default_idle", 7682ab52083SAnton Blanchard "cpu_idle", 7692ab52083SAnton Blanchard "enter_idle", 7702ab52083SAnton Blanchard "exit_idle", 7712ab52083SAnton Blanchard "mwait_idle", 77259b90056SArnaldo Carvalho de Melo "mwait_idle_with_hints", 7733a3393efSAnton Blanchard "ppc64_runlatch_off", 7743a3393efSAnton Blanchard "pseries_dedicated_idle_sleep", 7752ab52083SAnton Blanchard NULL 7762ab52083SAnton Blanchard }; 7772ab52083SAnton Blanchard 77886470930SIngo Molnar static int symbol_filter(struct dso *self, struct symbol *sym) 77986470930SIngo Molnar { 78086470930SIngo Molnar struct sym_entry *syme; 78186470930SIngo Molnar const char *name = sym->name; 7822ab52083SAnton Blanchard int i; 78386470930SIngo Molnar 7843a3393efSAnton Blanchard /* 7853a3393efSAnton Blanchard * ppc64 uses function descriptors and appends a '.' to the 7863a3393efSAnton Blanchard * start of every instruction address. Remove it. 7873a3393efSAnton Blanchard */ 7883a3393efSAnton Blanchard if (name[0] == '.') 7893a3393efSAnton Blanchard name++; 7903a3393efSAnton Blanchard 79186470930SIngo Molnar if (!strcmp(name, "_text") || 79286470930SIngo Molnar !strcmp(name, "_etext") || 79386470930SIngo Molnar !strcmp(name, "_sinittext") || 79486470930SIngo Molnar !strncmp("init_module", name, 11) || 79586470930SIngo Molnar !strncmp("cleanup_module", name, 14) || 79686470930SIngo Molnar strstr(name, "_text_start") || 79786470930SIngo Molnar strstr(name, "_text_end")) 79886470930SIngo Molnar return 1; 79986470930SIngo Molnar 80086470930SIngo Molnar syme = dso__sym_priv(self, sym); 801923c42c1SMike Galbraith pthread_mutex_init(&syme->source_lock, NULL); 802923c42c1SMike Galbraith if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) 803923c42c1SMike Galbraith sym_filter_entry = syme; 804923c42c1SMike Galbraith 8052ab52083SAnton Blanchard for (i = 0; skip_symbols[i]; i++) { 8062ab52083SAnton Blanchard if (!strcmp(skip_symbols[i], name)) { 80786470930SIngo Molnar syme->skip = 1; 8082ab52083SAnton Blanchard break; 8092ab52083SAnton Blanchard } 8102ab52083SAnton Blanchard } 81186470930SIngo Molnar 81286470930SIngo Molnar return 0; 81386470930SIngo Molnar } 81486470930SIngo Molnar 81586470930SIngo Molnar static int parse_symbols(void) 81686470930SIngo Molnar { 81786470930SIngo Molnar struct rb_node *node; 81886470930SIngo Molnar struct symbol *sym; 81942976487SMike Galbraith int modules = vmlinux ? 1 : 0; 82086470930SIngo Molnar 82186470930SIngo Molnar kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry)); 82286470930SIngo Molnar if (kernel_dso == NULL) 82386470930SIngo Molnar return -1; 82486470930SIngo Molnar 82542976487SMike Galbraith if (dso__load_kernel(kernel_dso, vmlinux, symbol_filter, verbose, modules) <= 0) 82686470930SIngo Molnar goto out_delete_dso; 82786470930SIngo Molnar 82886470930SIngo Molnar node = rb_first(&kernel_dso->syms); 82986470930SIngo Molnar sym = rb_entry(node, struct symbol, rb_node); 83086470930SIngo Molnar min_ip = sym->start; 83186470930SIngo Molnar 83286470930SIngo Molnar node = rb_last(&kernel_dso->syms); 83386470930SIngo Molnar sym = rb_entry(node, struct symbol, rb_node); 83486470930SIngo Molnar max_ip = sym->end; 83586470930SIngo Molnar 83686470930SIngo Molnar if (dump_symtab) 83786470930SIngo Molnar dso__fprintf(kernel_dso, stderr); 83886470930SIngo Molnar 83986470930SIngo Molnar return 0; 84086470930SIngo Molnar 84186470930SIngo Molnar out_delete_dso: 84286470930SIngo Molnar dso__delete(kernel_dso); 84386470930SIngo Molnar kernel_dso = NULL; 84486470930SIngo Molnar return -1; 84586470930SIngo Molnar } 84686470930SIngo Molnar 84786470930SIngo Molnar /* 84886470930SIngo Molnar * Binary search in the histogram table and record the hit: 84986470930SIngo Molnar */ 8509cffa8d5SPaul Mackerras static void record_ip(u64 ip, int counter) 85186470930SIngo Molnar { 85286470930SIngo Molnar struct symbol *sym = dso__find_symbol(kernel_dso, ip); 85386470930SIngo Molnar 85486470930SIngo Molnar if (sym != NULL) { 85586470930SIngo Molnar struct sym_entry *syme = dso__sym_priv(kernel_dso, sym); 85686470930SIngo Molnar 85786470930SIngo Molnar if (!syme->skip) { 85886470930SIngo Molnar syme->count[counter]++; 859923c42c1SMike Galbraith record_precise_ip(syme, counter, ip); 86086470930SIngo Molnar pthread_mutex_lock(&active_symbols_lock); 86186470930SIngo Molnar if (list_empty(&syme->node) || !syme->node.next) 86286470930SIngo Molnar __list_insert_active_sym(syme); 86386470930SIngo Molnar pthread_mutex_unlock(&active_symbols_lock); 86486470930SIngo Molnar return; 86586470930SIngo Molnar } 86686470930SIngo Molnar } 86786470930SIngo Molnar 86886470930SIngo Molnar samples--; 86986470930SIngo Molnar } 87086470930SIngo Molnar 871e6e18ec7SPeter Zijlstra static void process_event(u64 ip, int counter, int user) 87286470930SIngo Molnar { 87386470930SIngo Molnar samples++; 87486470930SIngo Molnar 875e6e18ec7SPeter Zijlstra if (user) { 87686470930SIngo Molnar userspace_samples++; 87786470930SIngo Molnar return; 87886470930SIngo Molnar } 87986470930SIngo Molnar 88086470930SIngo Molnar record_ip(ip, counter); 88186470930SIngo Molnar } 88286470930SIngo Molnar 88386470930SIngo Molnar struct mmap_data { 88486470930SIngo Molnar int counter; 88586470930SIngo Molnar void *base; 886f37a291cSIngo Molnar int mask; 88786470930SIngo Molnar unsigned int prev; 88886470930SIngo Molnar }; 88986470930SIngo Molnar 89086470930SIngo Molnar static unsigned int mmap_read_head(struct mmap_data *md) 89186470930SIngo Molnar { 89286470930SIngo Molnar struct perf_counter_mmap_page *pc = md->base; 89386470930SIngo Molnar int head; 89486470930SIngo Molnar 89586470930SIngo Molnar head = pc->data_head; 89686470930SIngo Molnar rmb(); 89786470930SIngo Molnar 89886470930SIngo Molnar return head; 89986470930SIngo Molnar } 90086470930SIngo Molnar 90186470930SIngo Molnar struct timeval last_read, this_read; 90286470930SIngo Molnar 9032f01190aSFrederic Weisbecker static void mmap_read_counter(struct mmap_data *md) 90486470930SIngo Molnar { 90586470930SIngo Molnar unsigned int head = mmap_read_head(md); 90686470930SIngo Molnar unsigned int old = md->prev; 90786470930SIngo Molnar unsigned char *data = md->base + page_size; 90886470930SIngo Molnar int diff; 90986470930SIngo Molnar 91086470930SIngo Molnar gettimeofday(&this_read, NULL); 91186470930SIngo Molnar 91286470930SIngo Molnar /* 91386470930SIngo Molnar * If we're further behind than half the buffer, there's a chance 91486470930SIngo Molnar * the writer will bite our tail and mess up the samples under us. 91586470930SIngo Molnar * 91686470930SIngo Molnar * If we somehow ended up ahead of the head, we got messed up. 91786470930SIngo Molnar * 91886470930SIngo Molnar * In either case, truncate and restart at head. 91986470930SIngo Molnar */ 92086470930SIngo Molnar diff = head - old; 92186470930SIngo Molnar if (diff > md->mask / 2 || diff < 0) { 92286470930SIngo Molnar struct timeval iv; 92386470930SIngo Molnar unsigned long msecs; 92486470930SIngo Molnar 92586470930SIngo Molnar timersub(&this_read, &last_read, &iv); 92686470930SIngo Molnar msecs = iv.tv_sec*1000 + iv.tv_usec/1000; 92786470930SIngo Molnar 92886470930SIngo Molnar fprintf(stderr, "WARNING: failed to keep up with mmap data." 92986470930SIngo Molnar " Last read %lu msecs ago.\n", msecs); 93086470930SIngo Molnar 93186470930SIngo Molnar /* 93286470930SIngo Molnar * head points to a known good entry, start there. 93386470930SIngo Molnar */ 93486470930SIngo Molnar old = head; 93586470930SIngo Molnar } 93686470930SIngo Molnar 93786470930SIngo Molnar last_read = this_read; 93886470930SIngo Molnar 93986470930SIngo Molnar for (; old != head;) { 94086470930SIngo Molnar struct ip_event { 94186470930SIngo Molnar struct perf_event_header header; 9429cffa8d5SPaul Mackerras u64 ip; 9439cffa8d5SPaul Mackerras u32 pid, target_pid; 94486470930SIngo Molnar }; 94586470930SIngo Molnar struct mmap_event { 94686470930SIngo Molnar struct perf_event_header header; 9479cffa8d5SPaul Mackerras u32 pid, target_pid; 9489cffa8d5SPaul Mackerras u64 start; 9499cffa8d5SPaul Mackerras u64 len; 9509cffa8d5SPaul Mackerras u64 pgoff; 95186470930SIngo Molnar char filename[PATH_MAX]; 95286470930SIngo Molnar }; 95386470930SIngo Molnar 95486470930SIngo Molnar typedef union event_union { 95586470930SIngo Molnar struct perf_event_header header; 95686470930SIngo Molnar struct ip_event ip; 95786470930SIngo Molnar struct mmap_event mmap; 95886470930SIngo Molnar } event_t; 95986470930SIngo Molnar 96086470930SIngo Molnar event_t *event = (event_t *)&data[old & md->mask]; 96186470930SIngo Molnar 96286470930SIngo Molnar event_t event_copy; 96386470930SIngo Molnar 96486470930SIngo Molnar size_t size = event->header.size; 96586470930SIngo Molnar 96686470930SIngo Molnar /* 96786470930SIngo Molnar * Event straddles the mmap boundary -- header should always 96886470930SIngo Molnar * be inside due to u64 alignment of output. 96986470930SIngo Molnar */ 97086470930SIngo Molnar if ((old & md->mask) + size != ((old + size) & md->mask)) { 97186470930SIngo Molnar unsigned int offset = old; 97286470930SIngo Molnar unsigned int len = min(sizeof(*event), size), cpy; 97386470930SIngo Molnar void *dst = &event_copy; 97486470930SIngo Molnar 97586470930SIngo Molnar do { 97686470930SIngo Molnar cpy = min(md->mask + 1 - (offset & md->mask), len); 97786470930SIngo Molnar memcpy(dst, &data[offset & md->mask], cpy); 97886470930SIngo Molnar offset += cpy; 97986470930SIngo Molnar dst += cpy; 98086470930SIngo Molnar len -= cpy; 98186470930SIngo Molnar } while (len); 98286470930SIngo Molnar 98386470930SIngo Molnar event = &event_copy; 98486470930SIngo Molnar } 98586470930SIngo Molnar 98686470930SIngo Molnar old += size; 98786470930SIngo Molnar 988e6e18ec7SPeter Zijlstra if (event->header.type == PERF_EVENT_SAMPLE) { 989e6e18ec7SPeter Zijlstra int user = 990e6e18ec7SPeter Zijlstra (event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK) == PERF_EVENT_MISC_USER; 991e6e18ec7SPeter Zijlstra process_event(event->ip.ip, md->counter, user); 99286470930SIngo Molnar } 99386470930SIngo Molnar } 99486470930SIngo Molnar 99586470930SIngo Molnar md->prev = old; 99686470930SIngo Molnar } 99786470930SIngo Molnar 99886470930SIngo Molnar static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; 99986470930SIngo Molnar static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; 100086470930SIngo Molnar 10012f01190aSFrederic Weisbecker static void mmap_read(void) 10022f01190aSFrederic Weisbecker { 10032f01190aSFrederic Weisbecker int i, counter; 10042f01190aSFrederic Weisbecker 10052f01190aSFrederic Weisbecker for (i = 0; i < nr_cpus; i++) { 10062f01190aSFrederic Weisbecker for (counter = 0; counter < nr_counters; counter++) 10072f01190aSFrederic Weisbecker mmap_read_counter(&mmap_array[i][counter]); 10082f01190aSFrederic Weisbecker } 10092f01190aSFrederic Weisbecker } 10102f01190aSFrederic Weisbecker 1011716c69feSIngo Molnar int nr_poll; 1012716c69feSIngo Molnar int group_fd; 1013716c69feSIngo Molnar 1014716c69feSIngo Molnar static void start_counter(int i, int counter) 101586470930SIngo Molnar { 101686470930SIngo Molnar struct perf_counter_attr *attr; 10170fdc7e67SMike Galbraith int cpu; 101886470930SIngo Molnar 101986470930SIngo Molnar cpu = profile_cpu; 102086470930SIngo Molnar if (target_pid == -1 && profile_cpu == -1) 102186470930SIngo Molnar cpu = i; 102286470930SIngo Molnar 102386470930SIngo Molnar attr = attrs + counter; 102486470930SIngo Molnar 102586470930SIngo Molnar attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; 102686470930SIngo Molnar attr->freq = freq; 10270fdc7e67SMike Galbraith attr->inherit = (cpu < 0) && inherit; 102886470930SIngo Molnar 1029716c69feSIngo Molnar try_again: 103086470930SIngo Molnar fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0); 1031716c69feSIngo Molnar 103286470930SIngo Molnar if (fd[i][counter] < 0) { 103386470930SIngo Molnar int err = errno; 103486470930SIngo Molnar 103586470930SIngo Molnar if (err == EPERM) 1036716c69feSIngo Molnar die("No permission - are you root?\n"); 1037716c69feSIngo Molnar /* 1038716c69feSIngo Molnar * If it's cycles then fall back to hrtimer 1039716c69feSIngo Molnar * based cpu-clock-tick sw counter, which 1040716c69feSIngo Molnar * is always available even if no PMU support: 1041716c69feSIngo Molnar */ 1042716c69feSIngo Molnar if (attr->type == PERF_TYPE_HARDWARE 1043f4dbfa8fSPeter Zijlstra && attr->config == PERF_COUNT_HW_CPU_CYCLES) { 1044716c69feSIngo Molnar 10453da297a6SIngo Molnar if (verbose) 1046716c69feSIngo Molnar warning(" ... trying to fall back to cpu-clock-ticks\n"); 10473da297a6SIngo Molnar 1048716c69feSIngo Molnar attr->type = PERF_TYPE_SOFTWARE; 1049f4dbfa8fSPeter Zijlstra attr->config = PERF_COUNT_SW_CPU_CLOCK; 1050716c69feSIngo Molnar goto try_again; 1051716c69feSIngo Molnar } 105230c806a0SIngo Molnar printf("\n"); 105330c806a0SIngo Molnar error("perfcounter syscall returned with %d (%s)\n", 105430c806a0SIngo Molnar fd[i][counter], strerror(err)); 105530c806a0SIngo Molnar die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); 105686470930SIngo Molnar exit(-1); 105786470930SIngo Molnar } 105886470930SIngo Molnar assert(fd[i][counter] >= 0); 105986470930SIngo Molnar fcntl(fd[i][counter], F_SETFL, O_NONBLOCK); 106086470930SIngo Molnar 106186470930SIngo Molnar /* 106286470930SIngo Molnar * First counter acts as the group leader: 106386470930SIngo Molnar */ 106486470930SIngo Molnar if (group && group_fd == -1) 106586470930SIngo Molnar group_fd = fd[i][counter]; 106686470930SIngo Molnar 106786470930SIngo Molnar event_array[nr_poll].fd = fd[i][counter]; 106886470930SIngo Molnar event_array[nr_poll].events = POLLIN; 106986470930SIngo Molnar nr_poll++; 107086470930SIngo Molnar 107186470930SIngo Molnar mmap_array[i][counter].counter = counter; 107286470930SIngo Molnar mmap_array[i][counter].prev = 0; 107386470930SIngo Molnar mmap_array[i][counter].mask = mmap_pages*page_size - 1; 107486470930SIngo Molnar mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size, 107586470930SIngo Molnar PROT_READ, MAP_SHARED, fd[i][counter], 0); 107686470930SIngo Molnar if (mmap_array[i][counter].base == MAP_FAILED) 107786470930SIngo Molnar die("failed to mmap with %d (%s)\n", errno, strerror(errno)); 107886470930SIngo Molnar } 1079716c69feSIngo Molnar 1080716c69feSIngo Molnar static int __cmd_top(void) 1081716c69feSIngo Molnar { 1082716c69feSIngo Molnar pthread_t thread; 1083716c69feSIngo Molnar int i, counter; 1084716c69feSIngo Molnar int ret; 1085716c69feSIngo Molnar 1086716c69feSIngo Molnar for (i = 0; i < nr_cpus; i++) { 1087716c69feSIngo Molnar group_fd = -1; 1088716c69feSIngo Molnar for (counter = 0; counter < nr_counters; counter++) 1089716c69feSIngo Molnar start_counter(i, counter); 109086470930SIngo Molnar } 109186470930SIngo Molnar 10922f01190aSFrederic Weisbecker /* Wait for a minimal set of events before starting the snapshot */ 10932f01190aSFrederic Weisbecker poll(event_array, nr_poll, 100); 10942f01190aSFrederic Weisbecker 10952f01190aSFrederic Weisbecker mmap_read(); 10962f01190aSFrederic Weisbecker 109786470930SIngo Molnar if (pthread_create(&thread, NULL, display_thread, NULL)) { 109886470930SIngo Molnar printf("Could not create display thread.\n"); 109986470930SIngo Molnar exit(-1); 110086470930SIngo Molnar } 110186470930SIngo Molnar 110286470930SIngo Molnar if (realtime_prio) { 110386470930SIngo Molnar struct sched_param param; 110486470930SIngo Molnar 110586470930SIngo Molnar param.sched_priority = realtime_prio; 110686470930SIngo Molnar if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 110786470930SIngo Molnar printf("Could not set realtime priority.\n"); 110886470930SIngo Molnar exit(-1); 110986470930SIngo Molnar } 111086470930SIngo Molnar } 111186470930SIngo Molnar 111286470930SIngo Molnar while (1) { 111386470930SIngo Molnar int hits = samples; 111486470930SIngo Molnar 11152f01190aSFrederic Weisbecker mmap_read(); 111686470930SIngo Molnar 111786470930SIngo Molnar if (hits == samples) 111886470930SIngo Molnar ret = poll(event_array, nr_poll, 100); 111986470930SIngo Molnar } 112086470930SIngo Molnar 112186470930SIngo Molnar return 0; 112286470930SIngo Molnar } 112386470930SIngo Molnar 112486470930SIngo Molnar static const char * const top_usage[] = { 112586470930SIngo Molnar "perf top [<options>]", 112686470930SIngo Molnar NULL 112786470930SIngo Molnar }; 112886470930SIngo Molnar 112986470930SIngo Molnar static const struct option options[] = { 113086470930SIngo Molnar OPT_CALLBACK('e', "event", NULL, "event", 113186470930SIngo Molnar "event selector. use 'perf list' to list available events", 113286470930SIngo Molnar parse_events), 113386470930SIngo Molnar OPT_INTEGER('c', "count", &default_interval, 113486470930SIngo Molnar "event period to sample"), 113586470930SIngo Molnar OPT_INTEGER('p', "pid", &target_pid, 113686470930SIngo Molnar "profile events on existing pid"), 113786470930SIngo Molnar OPT_BOOLEAN('a', "all-cpus", &system_wide, 113886470930SIngo Molnar "system-wide collection from all CPUs"), 113986470930SIngo Molnar OPT_INTEGER('C', "CPU", &profile_cpu, 114086470930SIngo Molnar "CPU to profile on"), 114142976487SMike Galbraith OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"), 114286470930SIngo Molnar OPT_INTEGER('m', "mmap-pages", &mmap_pages, 114386470930SIngo Molnar "number of mmap data pages"), 114486470930SIngo Molnar OPT_INTEGER('r', "realtime", &realtime_prio, 114586470930SIngo Molnar "collect data with this RT SCHED_FIFO priority"), 114686470930SIngo Molnar OPT_INTEGER('d', "delay", &delay_secs, 114786470930SIngo Molnar "number of seconds to delay between refreshes"), 114886470930SIngo Molnar OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, 114986470930SIngo Molnar "dump the symbol table used for profiling"), 115086470930SIngo Molnar OPT_INTEGER('f', "count-filter", &count_filter, 115186470930SIngo Molnar "only display functions with more events than this"), 115286470930SIngo Molnar OPT_BOOLEAN('g', "group", &group, 115386470930SIngo Molnar "put the counters into a counter group"), 11540fdc7e67SMike Galbraith OPT_BOOLEAN('i', "inherit", &inherit, 11550fdc7e67SMike Galbraith "child tasks inherit counters"), 1156923c42c1SMike Galbraith OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name", 1157923c42c1SMike Galbraith "symbol to annotate - requires -k option"), 11581f208ea6SAnton Blanchard OPT_BOOLEAN('z', "zero", &zero, 115986470930SIngo Molnar "zero history across updates"), 116086470930SIngo Molnar OPT_INTEGER('F', "freq", &freq, 116186470930SIngo Molnar "profile at this frequency"), 116286470930SIngo Molnar OPT_INTEGER('E', "entries", &print_entries, 116386470930SIngo Molnar "display this many functions"), 11643da297a6SIngo Molnar OPT_BOOLEAN('v', "verbose", &verbose, 11653da297a6SIngo Molnar "be more verbose (show counter open errors, etc)"), 116686470930SIngo Molnar OPT_END() 116786470930SIngo Molnar }; 116886470930SIngo Molnar 1169f37a291cSIngo Molnar int cmd_top(int argc, const char **argv, const char *prefix __used) 117086470930SIngo Molnar { 117186470930SIngo Molnar int counter; 117286470930SIngo Molnar 117342976487SMike Galbraith symbol__init(); 117442976487SMike Galbraith 117586470930SIngo Molnar page_size = sysconf(_SC_PAGE_SIZE); 117686470930SIngo Molnar 117786470930SIngo Molnar argc = parse_options(argc, argv, options, top_usage, 0); 117886470930SIngo Molnar if (argc) 117986470930SIngo Molnar usage_with_options(top_usage, options); 118086470930SIngo Molnar 118186470930SIngo Molnar if (freq) { 118286470930SIngo Molnar default_interval = freq; 118386470930SIngo Molnar freq = 1; 118486470930SIngo Molnar } 118586470930SIngo Molnar 118686470930SIngo Molnar /* CPU and PID are mutually exclusive */ 118786470930SIngo Molnar if (target_pid != -1 && profile_cpu != -1) { 118886470930SIngo Molnar printf("WARNING: PID switch overriding CPU\n"); 118986470930SIngo Molnar sleep(1); 119086470930SIngo Molnar profile_cpu = -1; 119186470930SIngo Molnar } 119286470930SIngo Molnar 119386470930SIngo Molnar if (!nr_counters) 119486470930SIngo Molnar nr_counters = 1; 119586470930SIngo Molnar 119686470930SIngo Molnar if (delay_secs < 1) 119786470930SIngo Molnar delay_secs = 1; 119886470930SIngo Molnar 119986470930SIngo Molnar parse_symbols(); 1200923c42c1SMike Galbraith parse_source(sym_filter_entry); 120186470930SIngo Molnar 120286470930SIngo Molnar /* 120386470930SIngo Molnar * Fill in the ones not specifically initialized via -c: 120486470930SIngo Molnar */ 120586470930SIngo Molnar for (counter = 0; counter < nr_counters; counter++) { 120686470930SIngo Molnar if (attrs[counter].sample_period) 120786470930SIngo Molnar continue; 120886470930SIngo Molnar 120986470930SIngo Molnar attrs[counter].sample_period = default_interval; 121086470930SIngo Molnar } 121186470930SIngo Molnar 121286470930SIngo Molnar nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); 121386470930SIngo Molnar assert(nr_cpus <= MAX_NR_CPUS); 121486470930SIngo Molnar assert(nr_cpus >= 0); 121586470930SIngo Molnar 121686470930SIngo Molnar if (target_pid != -1 || profile_cpu != -1) 121786470930SIngo Molnar nr_cpus = 1; 121886470930SIngo Molnar 121986470930SIngo Molnar return __cmd_top(); 122086470930SIngo Molnar } 1221