diff options
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 887 |
1 files changed, 887 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c new file mode 100644 index 00000000..8e2c8579 --- /dev/null +++ b/tools/perf/builtin-record.c @@ -0,0 +1,887 @@ +/* + * 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/evlist.h" +#include "util/evsel.h" +#include "util/debug.h" +#include "util/session.h" +#include "util/symbol.h" +#include "util/cpumap.h" +#include "util/thread_map.h" + +#include <unistd.h> +#include <sched.h> +#include <sys/mman.h> + +#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) + +enum write_mode_t { + WRITE_FORCE, + WRITE_APPEND +}; + +static u64 user_interval = ULLONG_MAX; +static u64 default_interval = 0; + +static unsigned int page_size; +static unsigned int mmap_pages = UINT_MAX; +static unsigned int user_freq = UINT_MAX; +static int freq = 1000; +static int output; +static int pipe_output = 0; +static const char *output_name = NULL; +static int group = 0; +static int realtime_prio = 0; +static bool nodelay = false; +static bool raw_samples = false; +static bool sample_id_all_avail = true; +static bool system_wide = false; +static pid_t target_pid = -1; +static pid_t target_tid = -1; +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 sample_time = false; +static bool no_buildid = false; +static bool no_buildid_cache = false; +static struct perf_evlist *evsel_list; + +static long samples = 0; +static u64 bytes_written = 0; + +static int file_new = 1; +static off_t post_processing_offset; + +static struct perf_session *session; +static const char *cpu_list; + +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(union perf_event *event, + struct perf_sample *sample __used, + struct perf_session *self __used) +{ + write_output(event, event->header.size); + return 0; +} + +static void mmap_read(struct perf_mmap *md) +{ + unsigned int head = perf_mmap__read_head(md); + unsigned int old = md->prev; + unsigned char *data = md->base + page_size; + unsigned long size; + void *buf; + + if (old == head) + return; + + 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; + perf_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 || signr == SIGUSR1) + return; + + signal(signr, SIG_DFL); + kill(getpid(), signr); +} + +static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist) +{ + struct perf_event_attr *attr = &evsel->attr; + int track = !evsel->idx; /* only the first counter needs these */ + + attr->inherit = !no_inherit; + 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 (evlist->nr_entries > 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 (sample_id_all_avail && + (sample_time || system_wide || !no_inherit || cpu_list)) + attr->sample_type |= PERF_SAMPLE_TIME; + + if (raw_samples) { + attr->sample_type |= PERF_SAMPLE_TIME; + attr->sample_type |= PERF_SAMPLE_RAW; + attr->sample_type |= PERF_SAMPLE_CPU; + } + + if (nodelay) { + attr->watermark = 0; + attr->wakeup_events = 1; + } + + attr->mmap = track; + attr->comm = track; + + if (target_pid == -1 && target_tid == -1 && !system_wide) { + attr->disabled = 1; + attr->enable_on_exec = 1; + } +} + +static bool perf_evlist__equal(struct perf_evlist *evlist, + struct perf_evlist *other) +{ + struct perf_evsel *pos, *pair; + + if (evlist->nr_entries != other->nr_entries) + return false; + + pair = list_entry(other->entries.next, struct perf_evsel, node); + + list_for_each_entry(pos, &evlist->entries, node) { + if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) + return false; + pair = list_entry(pair->node.next, struct perf_evsel, node); + } + + return true; +} + +static void open_counters(struct perf_evlist *evlist) +{ + struct perf_evsel *pos; + + if (evlist->cpus->map[0] < 0) + no_inherit = true; + + list_for_each_entry(pos, &evlist->entries, node) { + struct perf_event_attr *attr = &pos->attr; + /* + * Check if parse_single_tracepoint_event has already asked for + * PERF_SAMPLE_TIME. + * + * XXX this is kludgy but short term fix for problems introduced by + * eac23d1c that broke 'perf script' by having different sample_types + * when using multiple tracepoint events when we use a perf binary + * that tries to use sample_id_all on an older kernel. + * + * We need to move counter creation to perf_session, support + * different sample_types, etc. + */ + bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; + + config_attr(pos, evlist); +retry_sample_id: + attr->sample_id_all = sample_id_all_avail ? 1 : 0; +try_again: + if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group) < 0) { + int err = errno; + + if (err == EPERM || err == EACCES) { + ui__warning_paranoid(); + exit(EXIT_FAILURE); + } else if (err == ENODEV && cpu_list) { + die("No such device - did you specify" + " an out-of-range profile CPU?\n"); + } else if (err == EINVAL && sample_id_all_avail) { + /* + * Old kernel, no attr->sample_id_type_all field + */ + sample_id_all_avail = false; + if (!sample_time && !raw_samples && !time_needed) + attr->sample_type &= ~PERF_SAMPLE_TIME; + + goto retry_sample_id; + } + + /* + * 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) + ui__warning("The cycles event is not supported, " + "trying to fall back to cpu-clock-ticks\n"); + attr->type = PERF_TYPE_SOFTWARE; + attr->config = PERF_COUNT_SW_CPU_CLOCK; + goto try_again; + } + + if (err == ENOENT) { + ui__warning("The %s event is not supported.\n", + event_name(pos)); + exit(EXIT_FAILURE); + } + + printf("\n"); + error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", + err, 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"); + } + } + + if (perf_evlist__set_filters(evlist)) { + error("failed to set filter with %d (%s)\n", errno, + strerror(errno)); + exit(-1); + } + + if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) + die("failed to mmap with %d (%s)\n", errno, strerror(errno)); + + if (file_new) + session->evlist = evlist; + else { + if (!perf_evlist__equal(session->evlist, evlist)) { + fprintf(stderr, "incompatible append\n"); + exit(-1); + } + } + + perf_session__update_sample_type(session); +} + +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; + + if (!no_buildid) + process_buildids(); + perf_session__write_header(session, evsel_list, output, true); + perf_session__delete(session); + perf_evlist__delete(evsel_list); + symbol__exit(); + } +} + +static void perf_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 = perf_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 = perf_event__synthesize_kernel_mmap(process_synthesized_event, + psession, machine, "_text"); + if (err < 0) + err = perf_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 < evsel_list->nr_mmaps; i++) { + if (evsel_list->mmap[i].base) + mmap_read(&evsel_list->mmap[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; + 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); + signal(SIGUSR1, sig_handler); + + if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { + perror("failed to create pipes"); + exit(-1); + } + + if (!output_name) { + if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) + pipe_output = 1; + else + output_name = "perf.data"; + } + if (output_name) { + 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, NULL); + if (session == NULL) { + pr_err("Not enough memory for reading perf file header\n"); + return -1; + } + + if (!no_buildid) + perf_header__set_feat(&session->header, HEADER_BUILD_ID); + + if (!file_new) { + err = perf_session__read_header(session, output); + if (err < 0) + goto out_delete_session; + } + + if (have_tracepoints(&evsel_list->entries)) + perf_header__set_feat(&session->header, HEADER_TRACE_INFO); + + /* 512 kiB: default amount of unprivileged mlocked memory */ + if (mmap_pages == UINT_MAX) + mmap_pages = (512 * 1024) / page_size; + + 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]); + kill(getppid(), SIGUSR1); + exit(-1); + } + + if (!system_wide && target_tid == -1 && target_pid == -1) + evsel_list->threads->map[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]); + } + + open_counters(evsel_list); + + /* + * perf_session__delete(session) will be called at atexit_header() + */ + atexit(atexit_header); + + if (pipe_output) { + err = perf_header__write_pipe(output); + if (err < 0) + return err; + } else if (file_new) { + err = perf_session__write_header(session, evsel_list, + output, false); + if (err < 0) + return err; + } + + post_processing_offset = lseek(output, 0, SEEK_CUR); + + if (pipe_output) { + err = perf_session__synthesize_attrs(session, + process_synthesized_event); + if (err < 0) { + pr_err("Couldn't synthesize attrs.\n"); + return err; + } + + err = perf_event__synthesize_event_types(process_synthesized_event, + session); + if (err < 0) { + pr_err("Couldn't synthesize event_types.\n"); + return err; + } + + if (have_tracepoints(&evsel_list->entries)) { + /* + * 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 = perf_event__synthesize_tracing_data(output, evsel_list, + 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 = perf_event__synthesize_kernel_mmap(process_synthesized_event, + session, machine, "_text"); + if (err < 0) + err = perf_event__synthesize_kernel_mmap(process_synthesized_event, + session, machine, "_stext"); + if (err < 0) + pr_err("Couldn't record kernel reference relocation symbol\n" + "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" + "Check /proc/kallsyms permission or run as root.\n"); + + err = perf_event__synthesize_modules(process_synthesized_event, + session, machine); + if (err < 0) + pr_err("Couldn't record kernel module information.\n" + "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" + "Check /proc/modules permission or run as root.\n"); + + if (perf_guest) + perf_session__process_machines(session, + perf_event__synthesize_guest_os); + + if (!system_wide) + perf_event__synthesize_thread_map(evsel_list->threads, + process_synthesized_event, + session); + else + perf_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(evsel_list->pollfd, evsel_list->nr_fds, -1); + waking++; + } + + if (done) { + for (i = 0; i < evsel_list->cpus->nr; i++) { + struct perf_evsel *pos; + + list_for_each_entry(pos, &evsel_list->entries, node) { + for (thread = 0; + thread < evsel_list->threads->nr; + thread++) + ioctl(FD(pos, i, thread), + PERF_EVENT_IOC_DISABLE); + } + } + } + } + + if (quiet || signr == SIGUSR1) + 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 (~%" PRIu64 " 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", &evsel_list, "event", + "event selector. use 'perf list' to list available events", + parse_events), + OPT_CALLBACK(0, "filter", &evsel_list, "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('D', "no-delay", &nodelay, + "collect data without buffering"), + 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('T', "timestamp", &sample_time, "Sample timestamps"), + OPT_BOOLEAN('n', "no-samples", &no_samples, + "don't sample"), + OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache, + "do not update the buildid cache"), + OPT_BOOLEAN('B', "no-buildid", &no_buildid, + "do not collect buildids in perf.data"), + OPT_CALLBACK('G', "cgroup", &evsel_list, "name", + "monitor event in cgroup name only", + parse_cgroups), + OPT_END() +}; + +int cmd_record(int argc, const char **argv, const char *prefix __used) +{ + int err = -ENOMEM; + struct perf_evsel *pos; + + evsel_list = perf_evlist__new(NULL, NULL); + if (evsel_list == NULL) + return -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; + } + + if (nr_cgroups && !system_wide) { + fprintf(stderr, "cgroup monitoring only available in" + " system-wide mode\n"); + usage_with_options(record_usage, record_options); + } + + symbol__init(); + + if (symbol_conf.kptr_restrict) + pr_warning( +"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" +"check /proc/sys/kernel/kptr_restrict.\n\n" +"Samples in kernel functions may not be resolved if a suitable vmlinux\n" +"file is not found in the buildid cache or in the vmlinux path.\n\n" +"Samples in kernel modules won't be resolved at all.\n\n" +"If some relocation was applied (e.g. kexec) symbols may be misresolved\n" +"even with a suitable vmlinux or kallsyms file.\n\n"); + + if (no_buildid_cache || no_buildid) + disable_buildid_cache(); + + if (evsel_list->nr_entries == 0 && + perf_evlist__add_default(evsel_list) < 0) { + pr_err("Not enough memory for event selector list\n"); + goto out_symbol_exit; + } + + if (target_pid != -1) + target_tid = target_pid; + + if (perf_evlist__create_maps(evsel_list, target_pid, + target_tid, cpu_list) < 0) + usage_with_options(record_usage, record_options); + + list_for_each_entry(pos, &evsel_list->entries, node) { + if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, + evsel_list->threads->nr) < 0) + goto out_free_fd; + if (perf_header__push_event(pos->attr.config, event_name(pos))) + goto out_free_fd; + } + + if (perf_evlist__alloc_pollfd(evsel_list) < 0) + 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_fd; + } + + err = __cmd_record(argc, argv); +out_free_fd: + perf_evlist__delete_maps(evsel_list); +out_symbol_exit: + symbol__exit(); + return err; +} |