| /* |
| * builtin-record.c |
| * |
| * Builtin record command: Record the profile of a workload |
| * (or a CPU, or a PID) into the perf.data output file - for |
| * later analysis via perf report. |
| */ |
| #define _FILE_OFFSET_BITS 64 |
| |
| #include "builtin.h" |
| |
| #include "perf.h" |
| |
| #include "util/build-id.h" |
| #include "util/util.h" |
| #include "util/parse-options.h" |
| #include "util/parse-events.h" |
| |
| #include "util/header.h" |
| #include "util/event.h" |
| #include "util/debug.h" |
| #include "util/session.h" |
| #include "util/symbol.h" |
| #include "util/cpumap.h" |
| |
| #include <unistd.h> |
| #include <sched.h> |
| #include <sys/mman.h> |
| |
| enum write_mode_t { |
| WRITE_FORCE, |
| WRITE_APPEND |
| }; |
| |
| static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; |
| |
| static u64 user_interval = ULLONG_MAX; |
| static u64 default_interval = 0; |
| |
| static int nr_cpus = 0; |
| static unsigned int page_size; |
| static unsigned int mmap_pages = 128; |
| static unsigned int user_freq = UINT_MAX; |
| static int freq = 1000; |
| static int output; |
| static int pipe_output = 0; |
| static const char *output_name = "perf.data"; |
| static int group = 0; |
| static int realtime_prio = 0; |
| static bool raw_samples = false; |
| static bool system_wide = false; |
| static pid_t target_pid = -1; |
| static pid_t target_tid = -1; |
| static pid_t *all_tids = NULL; |
| static int thread_num = 0; |
| static pid_t child_pid = -1; |
| static bool no_inherit = false; |
| static enum write_mode_t write_mode = WRITE_FORCE; |
| static bool call_graph = false; |
| static bool inherit_stat = false; |
| static bool no_samples = false; |
| static bool sample_address = false; |
| static bool no_buildid = false; |
| |
| static long samples = 0; |
| static u64 bytes_written = 0; |
| |
| static struct pollfd *event_array; |
| |
| static int nr_poll = 0; |
| static int nr_cpu = 0; |
| |
| static int file_new = 1; |
| static off_t post_processing_offset; |
| |
| static struct perf_session *session; |
| static const char *cpu_list; |
| |
| struct mmap_data { |
| int counter; |
| void *base; |
| unsigned int mask; |
| unsigned int prev; |
| }; |
| |
| static struct mmap_data mmap_array[MAX_NR_CPUS]; |
| |
| static unsigned long mmap_read_head(struct mmap_data *md) |
| { |
| struct perf_event_mmap_page *pc = md->base; |
| long head; |
| |
| head = pc->data_head; |
| rmb(); |
| |
| return head; |
| } |
| |
| static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
| { |
| struct perf_event_mmap_page *pc = md->base; |
| |
| /* |
| * ensure all reads are done before we write the tail out. |
| */ |
| /* mb(); */ |
| pc->data_tail = tail; |
| } |
| |
| static void advance_output(size_t size) |
| { |
| bytes_written += size; |
| } |
| |
| static void write_output(void *buf, size_t size) |
| { |
| while (size) { |
| int ret = write(output, buf, size); |
| |
| if (ret < 0) |
| die("failed to write"); |
| |
| size -= ret; |
| buf += ret; |
| |
| bytes_written += ret; |
| } |
| } |
| |
| static int process_synthesized_event(event_t *event, |
| struct perf_session *self __used) |
| { |
| write_output(event, event->header.size); |
| return 0; |
| } |
| |
| static void mmap_read(struct mmap_data *md) |
| { |
| unsigned int head = mmap_read_head(md); |
| unsigned int old = md->prev; |
| unsigned char *data = md->base + page_size; |
| unsigned long size; |
| void *buf; |
| int diff; |
| |
| /* |
| * If we're further behind than half the buffer, there's a chance |
| * the writer will bite our tail and mess up the samples under us. |
| * |
| * If we somehow ended up ahead of the head, we got messed up. |
| * |
| * In either case, truncate and restart at head. |
| */ |
| diff = head - old; |
| if (diff < 0) { |
| fprintf(stderr, "WARNING: failed to keep up with mmap data\n"); |
| /* |
| * head points to a known good entry, start there. |
| */ |
| old = head; |
| } |
| |
| if (old != head) |
| samples++; |
| |
| size = head - old; |
| |
| if ((old & md->mask) + size != (head & md->mask)) { |
| buf = &data[old & md->mask]; |
| size = md->mask + 1 - (old & md->mask); |
| old += size; |
| |
| write_output(buf, size); |
| } |
| |
| buf = &data[old & md->mask]; |
| size = head - old; |
| old += size; |
| |
| write_output(buf, size); |
| |
| md->prev = old; |
| mmap_write_tail(md, old); |
| } |
| |
| static volatile int done = 0; |
| static volatile int signr = -1; |
| |
| static void sig_handler(int sig) |
| { |
| done = 1; |
| signr = sig; |
| } |
| |
| static void sig_atexit(void) |
| { |
| if (child_pid > 0) |
| kill(child_pid, SIGTERM); |
| |
| if (signr == -1) |
| return; |
| |
| signal(signr, SIG_DFL); |
| kill(getpid(), signr); |
| } |
| |
| static int group_fd; |
| |
| static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr) |
| { |
| struct perf_header_attr *h_attr; |
| |
| if (nr < session->header.attrs) { |
| h_attr = session->header.attr[nr]; |
| } else { |
| h_attr = perf_header_attr__new(a); |
| if (h_attr != NULL) |
| if (perf_header__add_attr(&session->header, h_attr) < 0) { |
| perf_header_attr__delete(h_attr); |
| h_attr = NULL; |
| } |
| } |
| |
| return h_attr; |
| } |
| |
| static void create_counter(int counter, int cpu) |
| { |
| char *filter = filters[counter]; |
| struct perf_event_attr *attr = attrs + counter; |
| struct perf_header_attr *h_attr; |
| int track = !counter; /* only the first counter needs these */ |
| int thread_index; |
| int ret; |
| struct { |
| u64 count; |
| u64 time_enabled; |
| u64 time_running; |
| u64 id; |
| } read_data; |
| |
| attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| PERF_FORMAT_TOTAL_TIME_RUNNING | |
| PERF_FORMAT_ID; |
| |
| attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
| |
| if (nr_counters > 1) |
| attr->sample_type |= PERF_SAMPLE_ID; |
| |
| /* |
| * We default some events to a 1 default interval. But keep |
| * it a weak assumption overridable by the user. |
| */ |
| if (!attr->sample_period || (user_freq != UINT_MAX && |
| user_interval != ULLONG_MAX)) { |
| if (freq) { |
| attr->sample_type |= PERF_SAMPLE_PERIOD; |
| attr->freq = 1; |
| attr->sample_freq = freq; |
| } else { |
| attr->sample_period = default_interval; |
| } |
| } |
| |
| if (no_samples) |
| attr->sample_freq = 0; |
| |
| if (inherit_stat) |
| attr->inherit_stat = 1; |
| |
| if (sample_address) { |
| attr->sample_type |= PERF_SAMPLE_ADDR; |
| attr->mmap_data = track; |
| } |
| |
| if (call_graph) |
| attr->sample_type |= PERF_SAMPLE_CALLCHAIN; |
| |
| if (system_wide) |
| attr->sample_type |= PERF_SAMPLE_CPU; |
| |
| if (raw_samples) { |
| attr->sample_type |= PERF_SAMPLE_TIME; |
| attr->sample_type |= PERF_SAMPLE_RAW; |
| attr->sample_type |= PERF_SAMPLE_CPU; |
| } |
| |
| attr->mmap = track; |
| attr->comm = track; |
| attr->inherit = !no_inherit; |
| if (target_pid == -1 && target_tid == -1 && !system_wide) { |
| attr->disabled = 1; |
| attr->enable_on_exec = 1; |
| } |
| |
| for (thread_index = 0; thread_index < thread_num; thread_index++) { |
| try_again: |
| fd[nr_cpu][counter][thread_index] = sys_perf_event_open(attr, |
| all_tids[thread_index], cpu, group_fd, 0); |
| |
| if (fd[nr_cpu][counter][thread_index] < 0) { |
| int err = errno; |
| |
| if (err == EPERM || err == EACCES) |
| die("Permission error - are you root?\n" |
| "\t Consider tweaking" |
| " /proc/sys/kernel/perf_event_paranoid.\n"); |
| else if (err == ENODEV && cpu_list) { |
| die("No such device - did you specify" |
| " an out-of-range profile CPU?\n"); |
| } |
| |
| /* |
| * If it's cycles then fall back to hrtimer |
| * based cpu-clock-tick sw counter, which |
| * is always available even if no PMU support: |
| */ |
| if (attr->type == PERF_TYPE_HARDWARE |
| && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
| |
| if (verbose) |
| warning(" ... trying to fall back to cpu-clock-ticks\n"); |
| attr->type = PERF_TYPE_SOFTWARE; |
| attr->config = PERF_COUNT_SW_CPU_CLOCK; |
| goto try_again; |
| } |
| printf("\n"); |
| error("perfcounter syscall returned with %d (%s)\n", |
| fd[nr_cpu][counter][thread_index], strerror(err)); |
| |
| #if defined(__i386__) || defined(__x86_64__) |
| if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) |
| die("No hardware sampling interrupt available." |
| " No APIC? If so then you can boot the kernel" |
| " with the \"lapic\" boot parameter to" |
| " force-enable it.\n"); |
| #endif |
| |
| die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
| exit(-1); |
| } |
| |
| h_attr = get_header_attr(attr, counter); |
| if (h_attr == NULL) |
| die("nomem\n"); |
| |
| if (!file_new) { |
| if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { |
| fprintf(stderr, "incompatible append\n"); |
| exit(-1); |
| } |
| } |
| |
| if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) { |
| perror("Unable to read perf file descriptor"); |
| exit(-1); |
| } |
| |
| if (perf_header_attr__add_id(h_attr, read_data.id) < 0) { |
| pr_warning("Not enough memory to add id\n"); |
| exit(-1); |
| } |
| |
| assert(fd[nr_cpu][counter][thread_index] >= 0); |
| fcntl(fd[nr_cpu][counter][thread_index], F_SETFL, O_NONBLOCK); |
| |
| /* |
| * First counter acts as the group leader: |
| */ |
| if (group && group_fd == -1) |
| group_fd = fd[nr_cpu][counter][thread_index]; |
| |
| if (counter || thread_index) { |
| ret = ioctl(fd[nr_cpu][counter][thread_index], |
| PERF_EVENT_IOC_SET_OUTPUT, |
| fd[nr_cpu][0][0]); |
| if (ret) { |
| error("failed to set output: %d (%s)\n", errno, |
| strerror(errno)); |
| exit(-1); |
| } |
| } else { |
| mmap_array[nr_cpu].counter = counter; |
| mmap_array[nr_cpu].prev = 0; |
| mmap_array[nr_cpu].mask = mmap_pages*page_size - 1; |
| mmap_array[nr_cpu].base = mmap(NULL, (mmap_pages+1)*page_size, |
| PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter][thread_index], 0); |
| if (mmap_array[nr_cpu].base == MAP_FAILED) { |
| error("failed to mmap with %d (%s)\n", errno, strerror(errno)); |
| exit(-1); |
| } |
| |
| event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index]; |
| event_array[nr_poll].events = POLLIN; |
| nr_poll++; |
| } |
| |
| if (filter != NULL) { |
| ret = ioctl(fd[nr_cpu][counter][thread_index], |
| PERF_EVENT_IOC_SET_FILTER, filter); |
| if (ret) { |
| error("failed to set filter with %d (%s)\n", errno, |
| strerror(errno)); |
| exit(-1); |
| } |
| } |
| } |
| } |
| |
| static void open_counters(int cpu) |
| { |
| int counter; |
| |
| group_fd = -1; |
| for (counter = 0; counter < nr_counters; counter++) |
| create_counter(counter, cpu); |
| |
| nr_cpu++; |
| } |
| |
| static int process_buildids(void) |
| { |
| u64 size = lseek(output, 0, SEEK_CUR); |
| |
| if (size == 0) |
| return 0; |
| |
| session->fd = output; |
| return __perf_session__process_events(session, post_processing_offset, |
| size - post_processing_offset, |
| size, &build_id__mark_dso_hit_ops); |
| } |
| |
| static void atexit_header(void) |
| { |
| if (!pipe_output) { |
| session->header.data_size += bytes_written; |
| |
| process_buildids(); |
| perf_header__write(&session->header, output, true); |
| perf_session__delete(session); |
| symbol__exit(); |
| } |
| } |
| |
| static void event__synthesize_guest_os(struct machine *machine, void *data) |
| { |
| int err; |
| struct perf_session *psession = data; |
| |
| if (machine__is_host(machine)) |
| return; |
| |
| /* |
| *As for guest kernel when processing subcommand record&report, |
| *we arrange module mmap prior to guest kernel mmap and trigger |
| *a preload dso because default guest module symbols are loaded |
| *from guest kallsyms instead of /lib/modules/XXX/XXX. This |
| *method is used to avoid symbol missing when the first addr is |
| *in module instead of in guest kernel. |
| */ |
| err = event__synthesize_modules(process_synthesized_event, |
| psession, machine); |
| if (err < 0) |
| pr_err("Couldn't record guest kernel [%d]'s reference" |
| " relocation symbol.\n", machine->pid); |
| |
| /* |
| * We use _stext for guest kernel because guest kernel's /proc/kallsyms |
| * have no _text sometimes. |
| */ |
| err = event__synthesize_kernel_mmap(process_synthesized_event, |
| psession, machine, "_text"); |
| if (err < 0) |
| err = event__synthesize_kernel_mmap(process_synthesized_event, |
| psession, machine, "_stext"); |
| if (err < 0) |
| pr_err("Couldn't record guest kernel [%d]'s reference" |
| " relocation symbol.\n", machine->pid); |
| } |
| |
| static struct perf_event_header finished_round_event = { |
| .size = sizeof(struct perf_event_header), |
| .type = PERF_RECORD_FINISHED_ROUND, |
| }; |
| |
| static void mmap_read_all(void) |
| { |
| int i; |
| |
| for (i = 0; i < nr_cpu; i++) { |
| if (mmap_array[i].base) |
| mmap_read(&mmap_array[i]); |
| } |
| |
| if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO)) |
| write_output(&finished_round_event, sizeof(finished_round_event)); |
| } |
| |
| static int __cmd_record(int argc, const char **argv) |
| { |
| int i, counter; |
| struct stat st; |
| int flags; |
| int err; |
| unsigned long waking = 0; |
| int child_ready_pipe[2], go_pipe[2]; |
| const bool forks = argc > 0; |
| char buf; |
| struct machine *machine; |
| |
| page_size = sysconf(_SC_PAGE_SIZE); |
| |
| atexit(sig_atexit); |
| signal(SIGCHLD, sig_handler); |
| signal(SIGINT, sig_handler); |
| |
| if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
| perror("failed to create pipes"); |
| exit(-1); |
| } |
| |
| if (!strcmp(output_name, "-")) |
| pipe_output = 1; |
| else if (!stat(output_name, &st) && st.st_size) { |
| if (write_mode == WRITE_FORCE) { |
| char oldname[PATH_MAX]; |
| snprintf(oldname, sizeof(oldname), "%s.old", |
| output_name); |
| unlink(oldname); |
| rename(output_name, oldname); |
| } |
| } else if (write_mode == WRITE_APPEND) { |
| write_mode = WRITE_FORCE; |
| } |
| |
| flags = O_CREAT|O_RDWR; |
| if (write_mode == WRITE_APPEND) |
| file_new = 0; |
| else |
| flags |= O_TRUNC; |
| |
| if (pipe_output) |
| output = STDOUT_FILENO; |
| else |
| output = open(output_name, flags, S_IRUSR | S_IWUSR); |
| if (output < 0) { |
| perror("failed to create output file"); |
| exit(-1); |
| } |
| |
| session = perf_session__new(output_name, O_WRONLY, |
| write_mode == WRITE_FORCE, false); |
| if (session == NULL) { |
| pr_err("Not enough memory for reading perf file header\n"); |
| return -1; |
| } |
| |
| if (!file_new) { |
| err = perf_header__read(session, output); |
| if (err < 0) |
| goto out_delete_session; |
| } |
| |
| if (have_tracepoints(attrs, nr_counters)) |
| perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
| |
| /* |
| * perf_session__delete(session) will be called at atexit_header() |
| */ |
| atexit(atexit_header); |
| |
| if (forks) { |
| child_pid = fork(); |
| if (child_pid < 0) { |
| perror("failed to fork"); |
| exit(-1); |
| } |
| |
| if (!child_pid) { |
| if (pipe_output) |
| dup2(2, 1); |
| close(child_ready_pipe[0]); |
| close(go_pipe[1]); |
| fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| |
| /* |
| * Do a dummy execvp to get the PLT entry resolved, |
| * so we avoid the resolver overhead on the real |
| * execvp call. |
| */ |
| execvp("", (char **)argv); |
| |
| /* |
| * Tell the parent we're ready to go |
| */ |
| close(child_ready_pipe[1]); |
| |
| /* |
| * Wait until the parent tells us to go. |
| */ |
| if (read(go_pipe[0], &buf, 1) == -1) |
| perror("unable to read pipe"); |
| |
| execvp(argv[0], (char **)argv); |
| |
| perror(argv[0]); |
| exit(-1); |
| } |
| |
| if (!system_wide && target_tid == -1 && target_pid == -1) |
| all_tids[0] = child_pid; |
| |
| close(child_ready_pipe[1]); |
| close(go_pipe[0]); |
| /* |
| * wait for child to settle |
| */ |
| if (read(child_ready_pipe[0], &buf, 1) == -1) { |
| perror("unable to read pipe"); |
| exit(-1); |
| } |
| close(child_ready_pipe[0]); |
| } |
| |
| nr_cpus = read_cpu_map(cpu_list); |
| if (nr_cpus < 1) { |
| perror("failed to collect number of CPUs"); |
| return -1; |
| } |
| |
| if (!system_wide && no_inherit && !cpu_list) { |
| open_counters(-1); |
| } else { |
| for (i = 0; i < nr_cpus; i++) |
| open_counters(cpumap[i]); |
| } |
| |
| if (pipe_output) { |
| err = perf_header__write_pipe(output); |
| if (err < 0) |
| return err; |
| } else if (file_new) { |
| err = perf_header__write(&session->header, output, false); |
| if (err < 0) |
| return err; |
| } |
| |
| post_processing_offset = lseek(output, 0, SEEK_CUR); |
| |
| if (pipe_output) { |
| err = event__synthesize_attrs(&session->header, |
| process_synthesized_event, |
| session); |
| if (err < 0) { |
| pr_err("Couldn't synthesize attrs.\n"); |
| return err; |
| } |
| |
| err = event__synthesize_event_types(process_synthesized_event, |
| session); |
| if (err < 0) { |
| pr_err("Couldn't synthesize event_types.\n"); |
| return err; |
| } |
| |
| if (have_tracepoints(attrs, nr_counters)) { |
| /* |
| * FIXME err <= 0 here actually means that |
| * there were no tracepoints so its not really |
| * an error, just that we don't need to |
| * synthesize anything. We really have to |
| * return this more properly and also |
| * propagate errors that now are calling die() |
| */ |
| err = event__synthesize_tracing_data(output, attrs, |
| nr_counters, |
| process_synthesized_event, |
| session); |
| if (err <= 0) { |
| pr_err("Couldn't record tracing data.\n"); |
| return err; |
| } |
| advance_output(err); |
| } |
| } |
| |
| machine = perf_session__find_host_machine(session); |
| if (!machine) { |
| pr_err("Couldn't find native kernel information.\n"); |
| return -1; |
| } |
| |
| err = event__synthesize_kernel_mmap(process_synthesized_event, |
| session, machine, "_text"); |
| if (err < 0) |
| err = event__synthesize_kernel_mmap(process_synthesized_event, |
| session, machine, "_stext"); |
| if (err < 0) { |
| pr_err("Couldn't record kernel reference relocation symbol.\n"); |
| return err; |
| } |
| |
| err = event__synthesize_modules(process_synthesized_event, |
| session, machine); |
| if (err < 0) { |
| pr_err("Couldn't record kernel reference relocation symbol.\n"); |
| return err; |
| } |
| if (perf_guest) |
| perf_session__process_machines(session, event__synthesize_guest_os); |
| |
| if (!system_wide) |
| event__synthesize_thread(target_tid, process_synthesized_event, |
| session); |
| else |
| event__synthesize_threads(process_synthesized_event, session); |
| |
| if (realtime_prio) { |
| struct sched_param param; |
| |
| param.sched_priority = realtime_prio; |
| if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
| pr_err("Could not set realtime priority.\n"); |
| exit(-1); |
| } |
| } |
| |
| /* |
| * Let the child rip |
| */ |
| if (forks) |
| close(go_pipe[1]); |
| |
| for (;;) { |
| int hits = samples; |
| int thread; |
| |
| mmap_read_all(); |
| |
| if (hits == samples) { |
| if (done) |
| break; |
| err = poll(event_array, nr_poll, -1); |
| waking++; |
| } |
| |
| if (done) { |
| for (i = 0; i < nr_cpu; i++) { |
| for (counter = 0; |
| counter < nr_counters; |
| counter++) { |
| for (thread = 0; |
| thread < thread_num; |
| thread++) |
| ioctl(fd[i][counter][thread], |
| PERF_EVENT_IOC_DISABLE); |
| } |
| } |
| } |
| } |
| |
| if (quiet) |
| return 0; |
| |
| fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
| |
| /* |
| * Approximate RIP event size: 24 bytes. |
| */ |
| fprintf(stderr, |
| "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
| (double)bytes_written / 1024.0 / 1024.0, |
| output_name, |
| bytes_written / 24); |
| |
| return 0; |
| |
| out_delete_session: |
| perf_session__delete(session); |
| return err; |
| } |
| |
| static const char * const record_usage[] = { |
| "perf record [<options>] [<command>]", |
| "perf record [<options>] -- <command> [<options>]", |
| NULL |
| }; |
| |
| static bool force, append_file; |
| |
| const struct option record_options[] = { |
| OPT_CALLBACK('e', "event", NULL, "event", |
| "event selector. use 'perf list' to list available events", |
| parse_events), |
| OPT_CALLBACK(0, "filter", NULL, "filter", |
| "event filter", parse_filter), |
| OPT_INTEGER('p', "pid", &target_pid, |
| "record events on existing process id"), |
| OPT_INTEGER('t', "tid", &target_tid, |
| "record events on existing thread id"), |
| OPT_INTEGER('r', "realtime", &realtime_prio, |
| "collect data with this RT SCHED_FIFO priority"), |
| OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
| "collect raw sample records from all opened counters"), |
| OPT_BOOLEAN('a', "all-cpus", &system_wide, |
| "system-wide collection from all CPUs"), |
| OPT_BOOLEAN('A', "append", &append_file, |
| "append to the output file to do incremental profiling"), |
| OPT_STRING('C', "cpu", &cpu_list, "cpu", |
| "list of cpus to monitor"), |
| OPT_BOOLEAN('f', "force", &force, |
| "overwrite existing data file (deprecated)"), |
| OPT_U64('c', "count", &user_interval, "event period to sample"), |
| OPT_STRING('o', "output", &output_name, "file", |
| "output file name"), |
| OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
| "child tasks do not inherit counters"), |
| OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"), |
| OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), |
| OPT_BOOLEAN('g', "call-graph", &call_graph, |
| "do call-graph (stack chain/backtrace) recording"), |
| OPT_INCR('v', "verbose", &verbose, |
| "be more verbose (show counter open errors, etc)"), |
| OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
| OPT_BOOLEAN('s', "stat", &inherit_stat, |
| "per thread counts"), |
| OPT_BOOLEAN('d', "data", &sample_address, |
| "Sample addresses"), |
| OPT_BOOLEAN('n', "no-samples", &no_samples, |
| "don't sample"), |
| OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid, |
| "do not update the buildid cache"), |
| OPT_END() |
| }; |
| |
| int cmd_record(int argc, const char **argv, const char *prefix __used) |
| { |
| int i, j, err = -ENOMEM; |
| |
| argc = parse_options(argc, argv, record_options, record_usage, |
| PARSE_OPT_STOP_AT_NON_OPTION); |
| if (!argc && target_pid == -1 && target_tid == -1 && |
| !system_wide && !cpu_list) |
| usage_with_options(record_usage, record_options); |
| |
| if (force && append_file) { |
| fprintf(stderr, "Can't overwrite and append at the same time." |
| " You need to choose between -f and -A"); |
| usage_with_options(record_usage, record_options); |
| } else if (append_file) { |
| write_mode = WRITE_APPEND; |
| } else { |
| write_mode = WRITE_FORCE; |
| } |
| |
| symbol__init(); |
| if (no_buildid) |
| disable_buildid_cache(); |
| |
| if (!nr_counters) { |
| nr_counters = 1; |
| attrs[0].type = PERF_TYPE_HARDWARE; |
| attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; |
| } |
| |
| if (target_pid != -1) { |
| target_tid = target_pid; |
| thread_num = find_all_tid(target_pid, &all_tids); |
| if (thread_num <= 0) { |
| fprintf(stderr, "Can't find all threads of pid %d\n", |
| target_pid); |
| usage_with_options(record_usage, record_options); |
| } |
| } else { |
| all_tids=malloc(sizeof(pid_t)); |
| if (!all_tids) |
| goto out_symbol_exit; |
| |
| all_tids[0] = target_tid; |
| thread_num = 1; |
| } |
| |
| for (i = 0; i < MAX_NR_CPUS; i++) { |
| for (j = 0; j < MAX_COUNTERS; j++) { |
| fd[i][j] = malloc(sizeof(int)*thread_num); |
| if (!fd[i][j]) |
| goto out_free_fd; |
| } |
| } |
| event_array = malloc( |
| sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num); |
| if (!event_array) |
| goto out_free_fd; |
| |
| if (user_interval != ULLONG_MAX) |
| default_interval = user_interval; |
| if (user_freq != UINT_MAX) |
| freq = user_freq; |
| |
| /* |
| * User specified count overrides default frequency. |
| */ |
| if (default_interval) |
| freq = 0; |
| else if (freq) { |
| default_interval = freq; |
| } else { |
| fprintf(stderr, "frequency and count are zero, aborting\n"); |
| err = -EINVAL; |
| goto out_free_event_array; |
| } |
| |
| err = __cmd_record(argc, argv); |
| |
| out_free_event_array: |
| free(event_array); |
| out_free_fd: |
| for (i = 0; i < MAX_NR_CPUS; i++) { |
| for (j = 0; j < MAX_COUNTERS; j++) |
| free(fd[i][j]); |
| } |
| free(all_tids); |
| all_tids = NULL; |
| out_symbol_exit: |
| symbol__exit(); |
| return err; |
| } |