diff --git a/Documentation/perf_counter/builtin-top.c b/Documentation/perf_counter/builtin-top.c index 626b32076499..87b925c8f8e8 100644 --- a/Documentation/perf_counter/builtin-top.c +++ b/Documentation/perf_counter/builtin-top.c @@ -45,8 +45,10 @@ #include "perf.h" #include "util/util.h" +#include "util/util.h" +#include "util/parse-options.h" +#include "util/parse-events.h" -#include #include #include @@ -70,8 +72,7 @@ static int system_wide = 0; -static int nr_counters = 0; -static __u64 event_id[MAX_COUNTERS] = { +static __u64 default_event_id[MAX_COUNTERS] = { EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), @@ -88,7 +89,7 @@ static int fd[MAX_NR_CPUS][MAX_COUNTERS]; static __u64 count_filter = 100; -static int tid = -1; +static int target_pid = -1; static int profile_cpu = -1; static int nr_cpus = 0; static int nmi = 1; @@ -100,8 +101,6 @@ static int use_mmap = 0; static int use_munmap = 0; static int freq = 0; -static char *vmlinux; - static char *sym_filter; static unsigned long filter_start; static unsigned long filter_end; @@ -110,18 +109,6 @@ static int delay_secs = 2; static int zero; static int dump_symtab; -static int scale; - -struct source_line { - uint64_t EIP; - unsigned long count; - char *line; - struct source_line *next; -}; - -static struct source_line *lines; -static struct source_line **lines_tail; - static const unsigned int default_count[] = { 1000000, 1000000, @@ -131,194 +118,6 @@ static const unsigned int default_count[] = { 10000, }; -static char *hw_event_names[] = { - "CPU cycles", - "instructions", - "cache references", - "cache misses", - "branches", - "branch misses", - "bus cycles", -}; - -static char *sw_event_names[] = { - "cpu clock ticks", - "task clock ticks", - "pagefaults", - "context switches", - "CPU migrations", - "minor faults", - "major faults", -}; - -struct event_symbol { - __u64 event; - char *symbol; -}; - -static struct event_symbol event_symbols[] = { - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cpu-cycles", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cycles", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), "instructions", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), "cache-references", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), "cache-misses", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branch-instructions", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branches", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_MISSES), "branch-misses", }, - {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BUS_CYCLES), "bus-cycles", }, - - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK), "cpu-clock", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), "task-clock", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "page-faults", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "faults", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MIN), "minor-faults", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MAJ), "major-faults", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "context-switches", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "cs", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "cpu-migrations", }, - {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "migrations", }, -}; - -#define __PERF_COUNTER_FIELD(config, name) \ - ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT) - -#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW) -#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG) -#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE) -#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT) - -static void display_events_help(void) -{ - unsigned int i; - __u64 e; - - printf( - " -e EVENT --event=EVENT # symbolic-name abbreviations"); - - for (i = 0; i < ARRAY_SIZE(event_symbols); i++) { - int type, id; - - e = event_symbols[i].event; - type = PERF_COUNTER_TYPE(e); - id = PERF_COUNTER_ID(e); - - printf("\n %d:%d: %-20s", - type, id, event_symbols[i].symbol); - } - - printf("\n" - " rNNN: raw PMU events (eventsel+umask)\n\n"); -} - -static void display_help(void) -{ - printf( - "Usage: kerneltop []\n" - " Or: kerneltop -S [] COMMAND [ARGS]\n\n" - "KernelTop Options (up to %d event types can be specified at once):\n\n", - MAX_COUNTERS); - - display_events_help(); - - printf( - " -c CNT --count=CNT # event period to sample\n\n" - " -C CPU --cpu=CPU # CPU (-1 for all) [default: -1]\n" - " -p PID --pid=PID # PID of sampled task (-1 for all) [default: -1]\n\n" - " -l # show scale factor for RR events\n" - " -d delay --delay= # sampling/display delay [default: 2]\n" - " -f CNT --filter=CNT # min-event-count filter [default: 100]\n\n" - " -r prio --realtime= # event acquisition runs with SCHED_FIFO policy\n" - " -s symbol --symbol= # function to be showed annotated one-shot\n" - " -x path --vmlinux= # the vmlinux binary, required for -s use\n" - " -z --zero # zero counts after display\n" - " -D --dump_symtab # dump symbol table to stderr on startup\n" - " -m pages --mmap_pages= # number of mmap data pages\n" - " -M --mmap_info # print mmap info stream\n" - " -U --munmap_info # print munmap info stream\n" - ); - - exit(0); -} - -static char *event_name(int ctr) -{ - __u64 config = event_id[ctr]; - int type = PERF_COUNTER_TYPE(config); - int id = PERF_COUNTER_ID(config); - static char buf[32]; - - if (PERF_COUNTER_RAW(config)) { - sprintf(buf, "raw 0x%llx", PERF_COUNTER_CONFIG(config)); - return buf; - } - - switch (type) { - case PERF_TYPE_HARDWARE: - if (id < PERF_HW_EVENTS_MAX) - return hw_event_names[id]; - return "unknown-hardware"; - - case PERF_TYPE_SOFTWARE: - if (id < PERF_SW_EVENTS_MAX) - return sw_event_names[id]; - return "unknown-software"; - - default: - break; - } - - return "unknown"; -} - -/* - * Each event can have multiple symbolic names. - * Symbolic names are (almost) exactly matched. - */ -static __u64 match_event_symbols(char *str) -{ - __u64 config, id; - int type; - unsigned int i; - - if (sscanf(str, "r%llx", &config) == 1) - return config | PERF_COUNTER_RAW_MASK; - - if (sscanf(str, "%d:%llu", &type, &id) == 2) - return EID(type, id); - - for (i = 0; i < ARRAY_SIZE(event_symbols); i++) { - if (!strncmp(str, event_symbols[i].symbol, - strlen(event_symbols[i].symbol))) - return event_symbols[i].event; - } - - return ~0ULL; -} - -static int parse_events(char *str) -{ - __u64 config; - -again: - if (nr_counters == MAX_COUNTERS) - return -1; - - config = match_event_symbols(str); - if (config == ~0ULL) - return -1; - - event_id[nr_counters] = config; - nr_counters++; - - str = strstr(str, ","); - if (str) { - str++; - goto again; - } - - return 0; -} - /* * Symbols */ @@ -331,7 +130,6 @@ struct sym_entry { char *sym; unsigned long count[MAX_COUNTERS]; int skip; - struct source_line *source; }; #define MAX_SYMS 100000 @@ -342,8 +140,6 @@ struct sym_entry *sym_filter_entry; static struct sym_entry sym_table[MAX_SYMS]; -static void show_details(struct sym_entry *sym); - /* * Ordering weight: count-1 * count-2 * ... / count-n */ @@ -419,15 +215,15 @@ static void print_sym_table(void) printf( "], "); - if (tid != -1) - printf(" (tid: %d", tid); + if (target_pid != -1) + printf(" (target_pid: %d", target_pid); else printf(" (all"); if (profile_cpu != -1) printf(", cpu: %d)\n", profile_cpu); else { - if (tid != -1) + if (target_pid != -1) printf(")\n"); else printf(", %d CPUs)\n", nr_cpus); @@ -463,9 +259,6 @@ static void print_sym_table(void) pcnt, tmp[i].addr, tmp[i].sym); } - if (sym_filter_entry) - show_details(sym_filter_entry); - { struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; @@ -628,134 +421,8 @@ static void parse_symbols(void) } } -/* - * Source lines - */ - -static void parse_vmlinux(char *filename) -{ - FILE *file; - char command[PATH_MAX*2]; - if (!filename) - return; - - sprintf(command, "objdump --start-address=0x%016lx --stop-address=0x%016lx -dS %s", filter_start, filter_end, filename); - - file = popen(command, "r"); - if (!file) - return; - - lines_tail = &lines; - while (!feof(file)) { - struct source_line *src; - size_t dummy = 0; - char *c; - - src = malloc(sizeof(struct source_line)); - assert(src != NULL); - memset(src, 0, sizeof(struct source_line)); - - if (getline(&src->line, &dummy, file) < 0) - break; - if (!src->line) - break; - - c = strchr(src->line, '\n'); - if (c) - *c = 0; - - src->next = NULL; - *lines_tail = src; - lines_tail = &src->next; - - if (strlen(src->line)>8 && src->line[8] == ':') - src->EIP = strtoull(src->line, NULL, 16); - if (strlen(src->line)>8 && src->line[16] == ':') - src->EIP = strtoull(src->line, NULL, 16); - } - pclose(file); -} - -static void record_precise_ip(uint64_t ip) -{ - struct source_line *line; - - for (line = lines; line; line = line->next) { - if (line->EIP == ip) - line->count++; - if (line->EIP > ip) - break; - } -} - -static void lookup_sym_in_vmlinux(struct sym_entry *sym) -{ - struct source_line *line; - char pattern[PATH_MAX]; - sprintf(pattern, "<%s>:", sym->sym); - - for (line = lines; line; line = line->next) { - if (strstr(line->line, pattern)) { - sym->source = line; - break; - } - } -} - -static void show_lines(struct source_line *line_queue, int line_queue_count) -{ - int i; - struct source_line *line; - - line = line_queue; - for (i = 0; i < line_queue_count; i++) { - printf("%8li\t%s\n", line->count, line->line); - line = line->next; - } -} - #define TRACE_COUNT 3 -static void show_details(struct sym_entry *sym) -{ - struct source_line *line; - struct source_line *line_queue = NULL; - int displayed = 0; - int line_queue_count = 0; - - if (!sym->source) - lookup_sym_in_vmlinux(sym); - if (!sym->source) - return; - - printf("Showing details for %s\n", sym->sym); - - line = sym->source; - while (line) { - if (displayed && strstr(line->line, ">:")) - break; - - if (!line_queue_count) - line_queue = line; - line_queue_count ++; - - if (line->count >= count_filter) { - show_lines(line_queue, line_queue_count); - line_queue_count = 0; - line_queue = NULL; - } else if (line_queue_count > TRACE_COUNT) { - line_queue = line_queue->next; - line_queue_count --; - } - - line->count = 0; - displayed++; - if (displayed > 300) - break; - line = line->next; - } -} - /* * Binary search in the histogram table and record the hit: */ @@ -764,8 +431,6 @@ static void record_ip(uint64_t ip, int counter) int left_idx, middle_idx, right_idx, idx; unsigned long left, middle, right; - record_precise_ip(ip); - left_idx = 0; right_idx = sym_table_count-1; assert(ip <= max_ip && ip >= min_ip); @@ -822,97 +487,6 @@ static void process_event(uint64_t ip, int counter) record_ip(ip, counter); } -static void process_options(int argc, char **argv) -{ - int error = 0, counter; - - for (;;) { - int option_index = 0; - /** Options for getopt */ - static struct option long_options[] = { - {"count", required_argument, NULL, 'c'}, - {"cpu", required_argument, NULL, 'C'}, - {"delay", required_argument, NULL, 'd'}, - {"dump_symtab", no_argument, NULL, 'D'}, - {"event", required_argument, NULL, 'e'}, - {"filter", required_argument, NULL, 'f'}, - {"group", required_argument, NULL, 'g'}, - {"help", no_argument, NULL, 'h'}, - {"nmi", required_argument, NULL, 'n'}, - {"mmap_info", no_argument, NULL, 'M'}, - {"mmap_pages", required_argument, NULL, 'm'}, - {"munmap_info", no_argument, NULL, 'U'}, - {"pid", required_argument, NULL, 'p'}, - {"realtime", required_argument, NULL, 'r'}, - {"scale", no_argument, NULL, 'l'}, - {"symbol", required_argument, NULL, 's'}, - {"stat", no_argument, NULL, 'S'}, - {"vmlinux", required_argument, NULL, 'x'}, - {"zero", no_argument, NULL, 'z'}, - {"freq", required_argument, NULL, 'F'}, - {NULL, 0, NULL, 0 } - }; - int c = getopt_long(argc, argv, "+:ac:C:d:De:f:g:hln:m:p:r:s:Sx:zMUF:", - long_options, &option_index); - if (c == -1) - break; - - switch (c) { - case 'a': system_wide = 1; break; - case 'c': default_interval = atoi(optarg); break; - case 'C': - /* CPU and PID are mutually exclusive */ - if (tid != -1) { - printf("WARNING: CPU switch overriding PID\n"); - sleep(1); - tid = -1; - } - profile_cpu = atoi(optarg); break; - case 'd': delay_secs = atoi(optarg); break; - case 'D': dump_symtab = 1; break; - - case 'e': error = parse_events(optarg); break; - - case 'f': count_filter = atoi(optarg); break; - case 'g': group = atoi(optarg); break; - case 'h': display_help(); break; - case 'l': scale = 1; break; - case 'n': nmi = atoi(optarg); break; - case 'p': - /* CPU and PID are mutually exclusive */ - if (profile_cpu != -1) { - printf("WARNING: PID switch overriding CPU\n"); - sleep(1); - profile_cpu = -1; - } - tid = atoi(optarg); break; - case 'r': realtime_prio = atoi(optarg); break; - case 's': sym_filter = strdup(optarg); break; - case 'x': vmlinux = strdup(optarg); break; - case 'z': zero = 1; break; - case 'm': mmap_pages = atoi(optarg); break; - case 'M': use_mmap = 1; break; - case 'U': use_munmap = 1; break; - case 'F': freq = 1; default_interval = atoi(optarg); break; - default: error = 1; break; - } - } - if (error) - display_help(); - - if (!nr_counters) { - nr_counters = 1; - event_id[0] = 0; - } - - for (counter = 0; counter < nr_counters; counter++) { - if (event_count[counter]) - continue; - - event_count[counter] = default_interval; - } -} - struct mmap_data { int counter; void *base; @@ -973,11 +547,11 @@ static void mmap_read(struct mmap_data *md) struct ip_event { struct perf_event_header header; __u64 ip; - __u32 pid, tid; + __u32 pid, target_pid; }; struct mmap_event { struct perf_event_header header; - __u32 pid, tid; + __u32 pid, target_pid; __u64 start; __u64 len; __u64 pgoff; @@ -1043,7 +617,7 @@ static void mmap_read(struct mmap_data *md) static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; -int cmd_top(int argc, char **argv, const char *prefix) +static int __cmd_top(void) { struct perf_counter_hw_event hw_event; pthread_t thread; @@ -1051,27 +625,12 @@ int cmd_top(int argc, char **argv, const char *prefix) unsigned int cpu; int ret; - page_size = sysconf(_SC_PAGE_SIZE); - - process_options(argc, argv); - - nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); - assert(nr_cpus <= MAX_NR_CPUS); - assert(nr_cpus >= 0); - - if (tid != -1 || profile_cpu != -1) - nr_cpus = 1; - - parse_symbols(); - if (vmlinux && sym_filter_entry) - parse_vmlinux(vmlinux); - for (i = 0; i < nr_cpus; i++) { group_fd = -1; for (counter = 0; counter < nr_counters; counter++) { cpu = profile_cpu; - if (tid == -1 && profile_cpu == -1) + if (target_pid == -1 && profile_cpu == -1) cpu = i; memset(&hw_event, 0, sizeof(hw_event)); @@ -1083,7 +642,7 @@ int cmd_top(int argc, char **argv, const char *prefix) hw_event.munmap = use_munmap; hw_event.freq = freq; - fd[i][counter] = sys_perf_counter_open(&hw_event, tid, cpu, group_fd, 0); + fd[i][counter] = sys_perf_counter_open(&hw_event, target_pid, cpu, group_fd, 0); if (fd[i][counter] < 0) { int err = errno; printf("kerneltop error: syscall returned with %d (%s)\n", @@ -1147,3 +706,95 @@ int cmd_top(int argc, char **argv, const char *prefix) return 0; } + +static const char * const top_usage[] = { + "perf top []", + NULL +}; + +static char events_help_msg[EVENTS_HELP_MAX]; + +static const struct option options[] = { + OPT_CALLBACK('e', "event", NULL, "event", + events_help_msg, parse_events), + OPT_INTEGER('c', "count", &default_interval, + "event period to sample"), + OPT_INTEGER('p', "pid", &target_pid, + "profile events on existing pid"), + OPT_BOOLEAN('a', "all-cpus", &system_wide, + "system-wide collection from all CPUs"), + OPT_INTEGER('C', "CPU", &profile_cpu, + "CPU to profile on"), + OPT_INTEGER('m', "mmap-pages", &mmap_pages, + "number of mmap data pages"), + OPT_INTEGER('r', "realtime", &realtime_prio, + "collect data with this RT SCHED_FIFO priority"), + OPT_INTEGER('d', "delay", &realtime_prio, + "number of seconds to delay between refreshes"), + OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, + "dump the symbol table used for profiling"), + OPT_INTEGER('f', "--count-filter", &count_filter, + "only display functions with more events than this"), + OPT_BOOLEAN('g', "group", &group, + "put the counters into a counter group"), + OPT_STRING('s', "sym-filter", &sym_filter, "pattern", + "only display symbols matchig this pattern"), + OPT_BOOLEAN('z', "zero", &group, + "zero history across updates"), + OPT_BOOLEAN('M', "use-mmap", &use_mmap, + "track mmap events"), + OPT_BOOLEAN('U', "use-munmap", &use_munmap, + "track munmap events"), + OPT_INTEGER('F', "--freq", &freq, + "profile at this frequency"), + OPT_END() +}; + +int cmd_top(int argc, const char **argv, const char *prefix) +{ + int counter; + + page_size = sysconf(_SC_PAGE_SIZE); + + create_events_help(events_help_msg); + memcpy(event_id, default_event_id, sizeof(default_event_id)); + + argc = parse_options(argc, argv, options, top_usage, 0); + if (argc) + usage_with_options(top_usage, options); + + if (freq) { + default_interval = freq; + freq = 1; + } + + /* CPU and PID are mutually exclusive */ + if (target_pid != -1 && profile_cpu != -1) { + printf("WARNING: PID switch overriding CPU\n"); + sleep(1); + profile_cpu = -1; + } + + if (!nr_counters) { + nr_counters = 1; + event_id[0] = 0; + } + + for (counter = 0; counter < nr_counters; counter++) { + if (event_count[counter]) + continue; + + event_count[counter] = default_interval; + } + + nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); + assert(nr_cpus <= MAX_NR_CPUS); + assert(nr_cpus >= 0); + + if (target_pid != -1 || profile_cpu != -1) + nr_cpus = 1; + + parse_symbols(); + + return __cmd_top(); +}