diff options
Diffstat (limited to 'kernel/tools/perf/builtin-record.c')
| -rw-r--r-- | kernel/tools/perf/builtin-record.c | 1015 |
1 files changed, 1015 insertions, 0 deletions
diff --git a/kernel/tools/perf/builtin-record.c b/kernel/tools/perf/builtin-record.c new file mode 100644 index 000000000..c3efdfb63 --- /dev/null +++ b/kernel/tools/perf/builtin-record.c @@ -0,0 +1,1015 @@ +/* + * 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. + */ +#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/callchain.h" +#include "util/cgroup.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/tool.h" +#include "util/symbol.h" +#include "util/cpumap.h" +#include "util/thread_map.h" +#include "util/data.h" + +#include <unistd.h> +#include <sched.h> +#include <sys/mman.h> + + +struct record { + struct perf_tool tool; + struct record_opts opts; + u64 bytes_written; + struct perf_data_file file; + struct perf_evlist *evlist; + struct perf_session *session; + const char *progname; + int realtime_prio; + bool no_buildid; + bool no_buildid_cache; + long samples; +}; + +static int record__write(struct record *rec, void *bf, size_t size) +{ + if (perf_data_file__write(rec->session->file, bf, size) < 0) { + pr_err("failed to write perf data, error: %m\n"); + return -1; + } + + rec->bytes_written += size; + return 0; +} + +static int process_synthesized_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) +{ + struct record *rec = container_of(tool, struct record, tool); + return record__write(rec, event, event->header.size); +} + +static int record__mmap_read(struct record *rec, int idx) +{ + struct perf_mmap *md = &rec->evlist->mmap[idx]; + u64 head = perf_mmap__read_head(md); + u64 old = md->prev; + unsigned char *data = md->base + page_size; + unsigned long size; + void *buf; + int rc = 0; + + if (old == head) + return 0; + + rec->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; + + if (record__write(rec, buf, size) < 0) { + rc = -1; + goto out; + } + } + + buf = &data[old & md->mask]; + size = head - old; + old += size; + + if (record__write(rec, buf, size) < 0) { + rc = -1; + goto out; + } + + md->prev = old; + perf_evlist__mmap_consume(rec->evlist, idx); +out: + return rc; +} + +static volatile int done = 0; +static volatile int signr = -1; +static volatile int child_finished = 0; + +static void sig_handler(int sig) +{ + if (sig == SIGCHLD) + child_finished = 1; + else + signr = sig; + + done = 1; +} + +static void record__sig_exit(void) +{ + if (signr == -1) + return; + + signal(signr, SIG_DFL); + raise(signr); +} + +static int record__open(struct record *rec) +{ + char msg[512]; + struct perf_evsel *pos; + struct perf_evlist *evlist = rec->evlist; + struct perf_session *session = rec->session; + struct record_opts *opts = &rec->opts; + int rc = 0; + + perf_evlist__config(evlist, opts); + + evlist__for_each(evlist, pos) { +try_again: + if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) { + if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { + if (verbose) + ui__warning("%s\n", msg); + goto try_again; + } + + rc = -errno; + perf_evsel__open_strerror(pos, &opts->target, + errno, msg, sizeof(msg)); + ui__error("%s\n", msg); + goto out; + } + } + + if (perf_evlist__apply_filters(evlist, &pos)) { + error("failed to set filter \"%s\" on event %s with %d (%s)\n", + pos->filter, perf_evsel__name(pos), errno, + strerror_r(errno, msg, sizeof(msg))); + rc = -1; + goto out; + } + + if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { + if (errno == EPERM) { + pr_err("Permission error mapping pages.\n" + "Consider increasing " + "/proc/sys/kernel/perf_event_mlock_kb,\n" + "or try again with a smaller value of -m/--mmap_pages.\n" + "(current value: %u)\n", opts->mmap_pages); + rc = -errno; + } else { + pr_err("failed to mmap with %d (%s)\n", errno, + strerror_r(errno, msg, sizeof(msg))); + rc = -errno; + } + goto out; + } + + session->evlist = evlist; + perf_session__set_id_hdr_size(session); +out: + return rc; +} + +static int process_sample_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct record *rec = container_of(tool, struct record, tool); + + rec->samples++; + + return build_id__mark_dso_hit(tool, event, sample, evsel, machine); +} + +static int process_buildids(struct record *rec) +{ + struct perf_data_file *file = &rec->file; + struct perf_session *session = rec->session; + + u64 size = lseek(perf_data_file__fd(file), 0, SEEK_CUR); + if (size == 0) + return 0; + + file->size = size; + + /* + * During this process, it'll load kernel map and replace the + * dso->long_name to a real pathname it found. In this case + * we prefer the vmlinux path like + * /lib/modules/3.16.4/build/vmlinux + * + * rather than build-id path (in debug directory). + * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 + */ + symbol_conf.ignore_vmlinux_buildid = true; + + return perf_session__process_events(session); +} + +static void perf_event__synthesize_guest_os(struct machine *machine, void *data) +{ + int err; + struct perf_tool *tool = data; + /* + *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(tool, process_synthesized_event, + 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(tool, process_synthesized_event, + machine); + 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 int record__mmap_read_all(struct record *rec) +{ + u64 bytes_written = rec->bytes_written; + int i; + int rc = 0; + + for (i = 0; i < rec->evlist->nr_mmaps; i++) { + if (rec->evlist->mmap[i].base) { + if (record__mmap_read(rec, i) != 0) { + rc = -1; + goto out; + } + } + } + + /* + * Mark the round finished in case we wrote + * at least one event. + */ + if (bytes_written != rec->bytes_written) + rc = record__write(rec, &finished_round_event, sizeof(finished_round_event)); + +out: + return rc; +} + +static void record__init_features(struct record *rec) +{ + struct perf_session *session = rec->session; + int feat; + + for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) + perf_header__set_feat(&session->header, feat); + + if (rec->no_buildid) + perf_header__clear_feat(&session->header, HEADER_BUILD_ID); + + if (!have_tracepoints(&rec->evlist->entries)) + perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); + + if (!rec->opts.branch_stack) + perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); +} + +static volatile int workload_exec_errno; + +/* + * perf_evlist__prepare_workload will send a SIGUSR1 + * if the fork fails, since we asked by setting its + * want_signal to true. + */ +static void workload_exec_failed_signal(int signo __maybe_unused, + siginfo_t *info, + void *ucontext __maybe_unused) +{ + workload_exec_errno = info->si_value.sival_int; + done = 1; + child_finished = 1; +} + +static int __cmd_record(struct record *rec, int argc, const char **argv) +{ + int err; + int status = 0; + unsigned long waking = 0; + const bool forks = argc > 0; + struct machine *machine; + struct perf_tool *tool = &rec->tool; + struct record_opts *opts = &rec->opts; + struct perf_data_file *file = &rec->file; + struct perf_session *session; + bool disabled = false, draining = false; + int fd; + + rec->progname = argv[0]; + + atexit(record__sig_exit); + signal(SIGCHLD, sig_handler); + signal(SIGINT, sig_handler); + signal(SIGTERM, sig_handler); + + session = perf_session__new(file, false, tool); + if (session == NULL) { + pr_err("Perf session creation failed.\n"); + return -1; + } + + fd = perf_data_file__fd(file); + rec->session = session; + + record__init_features(rec); + + if (forks) { + err = perf_evlist__prepare_workload(rec->evlist, &opts->target, + argv, file->is_pipe, + workload_exec_failed_signal); + if (err < 0) { + pr_err("Couldn't run the workload!\n"); + status = err; + goto out_delete_session; + } + } + + if (record__open(rec) != 0) { + err = -1; + goto out_child; + } + + if (!rec->evlist->nr_groups) + perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); + + if (file->is_pipe) { + err = perf_header__write_pipe(fd); + if (err < 0) + goto out_child; + } else { + err = perf_session__write_header(session, rec->evlist, fd, false); + if (err < 0) + goto out_child; + } + + if (!rec->no_buildid + && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { + pr_err("Couldn't generate buildids. " + "Use --no-buildid to profile anyway.\n"); + err = -1; + goto out_child; + } + + machine = &session->machines.host; + + if (file->is_pipe) { + err = perf_event__synthesize_attrs(tool, session, + process_synthesized_event); + if (err < 0) { + pr_err("Couldn't synthesize attrs.\n"); + goto out_child; + } + + if (have_tracepoints(&rec->evlist->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(tool, fd, rec->evlist, + process_synthesized_event); + if (err <= 0) { + pr_err("Couldn't record tracing data.\n"); + goto out_child; + } + rec->bytes_written += err; + } + } + + err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, + machine); + 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(tool, process_synthesized_event, + 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) { + machines__process_guests(&session->machines, + perf_event__synthesize_guest_os, tool); + } + + err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, + process_synthesized_event, opts->sample_address); + if (err != 0) + goto out_child; + + if (rec->realtime_prio) { + struct sched_param param; + + param.sched_priority = rec->realtime_prio; + if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { + pr_err("Could not set realtime priority.\n"); + err = -1; + goto out_child; + } + } + + /* + * When perf is starting the traced process, all the events + * (apart from group members) have enable_on_exec=1 set, + * so don't spoil it by prematurely enabling them. + */ + if (!target__none(&opts->target) && !opts->initial_delay) + perf_evlist__enable(rec->evlist); + + /* + * Let the child rip + */ + if (forks) + perf_evlist__start_workload(rec->evlist); + + if (opts->initial_delay) { + usleep(opts->initial_delay * 1000); + perf_evlist__enable(rec->evlist); + } + + for (;;) { + int hits = rec->samples; + + if (record__mmap_read_all(rec) < 0) { + err = -1; + goto out_child; + } + + if (hits == rec->samples) { + if (done || draining) + break; + err = perf_evlist__poll(rec->evlist, -1); + /* + * Propagate error, only if there's any. Ignore positive + * number of returned events and interrupt error. + */ + if (err > 0 || (err < 0 && errno == EINTR)) + err = 0; + waking++; + + if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) + draining = true; + } + + /* + * When perf is starting the traced process, at the end events + * die with the process and we wait for that. Thus no need to + * disable events in this case. + */ + if (done && !disabled && !target__none(&opts->target)) { + perf_evlist__disable(rec->evlist); + disabled = true; + } + } + + if (forks && workload_exec_errno) { + char msg[STRERR_BUFSIZE]; + const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg)); + pr_err("Workload failed: %s\n", emsg); + err = -1; + goto out_child; + } + + if (!quiet) + fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); + +out_child: + if (forks) { + int exit_status; + + if (!child_finished) + kill(rec->evlist->workload.pid, SIGTERM); + + wait(&exit_status); + + if (err < 0) + status = err; + else if (WIFEXITED(exit_status)) + status = WEXITSTATUS(exit_status); + else if (WIFSIGNALED(exit_status)) + signr = WTERMSIG(exit_status); + } else + status = err; + + /* this will be recalculated during process_buildids() */ + rec->samples = 0; + + if (!err && !file->is_pipe) { + rec->session->header.data_size += rec->bytes_written; + + if (!rec->no_buildid) + process_buildids(rec); + perf_session__write_header(rec->session, rec->evlist, fd, true); + } + + if (!err && !quiet) { + char samples[128]; + + if (rec->samples) + scnprintf(samples, sizeof(samples), + " (%" PRIu64 " samples)", rec->samples); + else + samples[0] = '\0'; + + fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s ]\n", + perf_data_file__size(file) / 1024.0 / 1024.0, + file->path, samples); + } + +out_delete_session: + perf_session__delete(session); + return status; +} + +#define BRANCH_OPT(n, m) \ + { .name = n, .mode = (m) } + +#define BRANCH_END { .name = NULL } + +struct branch_mode { + const char *name; + int mode; +}; + +static const struct branch_mode branch_modes[] = { + BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER), + BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL), + BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV), + BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY), + BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL), + BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN), + BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL), + BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX), + BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX), + BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX), + BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND), + BRANCH_END +}; + +static int +parse_branch_stack(const struct option *opt, const char *str, int unset) +{ +#define ONLY_PLM \ + (PERF_SAMPLE_BRANCH_USER |\ + PERF_SAMPLE_BRANCH_KERNEL |\ + PERF_SAMPLE_BRANCH_HV) + + uint64_t *mode = (uint64_t *)opt->value; + const struct branch_mode *br; + char *s, *os = NULL, *p; + int ret = -1; + + if (unset) + return 0; + + /* + * cannot set it twice, -b + --branch-filter for instance + */ + if (*mode) + return -1; + + /* str may be NULL in case no arg is passed to -b */ + if (str) { + /* because str is read-only */ + s = os = strdup(str); + if (!s) + return -1; + + for (;;) { + p = strchr(s, ','); + if (p) + *p = '\0'; + + for (br = branch_modes; br->name; br++) { + if (!strcasecmp(s, br->name)) + break; + } + if (!br->name) { + ui__warning("unknown branch filter %s," + " check man page\n", s); + goto error; + } + + *mode |= br->mode; + + if (!p) + break; + + s = p + 1; + } + } + ret = 0; + + /* default to any branch */ + if ((*mode & ~ONLY_PLM) == 0) { + *mode = PERF_SAMPLE_BRANCH_ANY; + } +error: + free(os); + return ret; +} + +static void callchain_debug(void) +{ + static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; + + pr_debug("callchain: type %s\n", str[callchain_param.record_mode]); + + if (callchain_param.record_mode == CALLCHAIN_DWARF) + pr_debug("callchain: stack dump size %d\n", + callchain_param.dump_size); +} + +int record_parse_callchain_opt(const struct option *opt __maybe_unused, + const char *arg, + int unset) +{ + int ret; + + callchain_param.enabled = !unset; + + /* --no-call-graph */ + if (unset) { + callchain_param.record_mode = CALLCHAIN_NONE; + pr_debug("callchain: disabled\n"); + return 0; + } + + ret = parse_callchain_record_opt(arg); + if (!ret) + callchain_debug(); + + return ret; +} + +int record_callchain_opt(const struct option *opt __maybe_unused, + const char *arg __maybe_unused, + int unset __maybe_unused) +{ + callchain_param.enabled = true; + + if (callchain_param.record_mode == CALLCHAIN_NONE) + callchain_param.record_mode = CALLCHAIN_FP; + + callchain_debug(); + return 0; +} + +static int perf_record_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "record.call-graph")) + var = "call-graph.record-mode"; /* fall-through */ + + return perf_default_config(var, value, cb); +} + +struct clockid_map { + const char *name; + int clockid; +}; + +#define CLOCKID_MAP(n, c) \ + { .name = n, .clockid = (c), } + +#define CLOCKID_END { .name = NULL, } + + +/* + * Add the missing ones, we need to build on many distros... + */ +#ifndef CLOCK_MONOTONIC_RAW +#define CLOCK_MONOTONIC_RAW 4 +#endif +#ifndef CLOCK_BOOTTIME +#define CLOCK_BOOTTIME 7 +#endif +#ifndef CLOCK_TAI +#define CLOCK_TAI 11 +#endif + +static const struct clockid_map clockids[] = { + /* available for all events, NMI safe */ + CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), + CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), + + /* available for some events */ + CLOCKID_MAP("realtime", CLOCK_REALTIME), + CLOCKID_MAP("boottime", CLOCK_BOOTTIME), + CLOCKID_MAP("tai", CLOCK_TAI), + + /* available for the lazy */ + CLOCKID_MAP("mono", CLOCK_MONOTONIC), + CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), + CLOCKID_MAP("real", CLOCK_REALTIME), + CLOCKID_MAP("boot", CLOCK_BOOTTIME), + + CLOCKID_END, +}; + +static int parse_clockid(const struct option *opt, const char *str, int unset) +{ + struct record_opts *opts = (struct record_opts *)opt->value; + const struct clockid_map *cm; + const char *ostr = str; + + if (unset) { + opts->use_clockid = 0; + return 0; + } + + /* no arg passed */ + if (!str) + return 0; + + /* no setting it twice */ + if (opts->use_clockid) + return -1; + + opts->use_clockid = true; + + /* if its a number, we're done */ + if (sscanf(str, "%d", &opts->clockid) == 1) + return 0; + + /* allow a "CLOCK_" prefix to the name */ + if (!strncasecmp(str, "CLOCK_", 6)) + str += 6; + + for (cm = clockids; cm->name; cm++) { + if (!strcasecmp(str, cm->name)) { + opts->clockid = cm->clockid; + return 0; + } + } + + opts->use_clockid = false; + ui__warning("unknown clockid %s, check man page\n", ostr); + return -1; +} + +static const char * const __record_usage[] = { + "perf record [<options>] [<command>]", + "perf record [<options>] -- <command> [<options>]", + NULL +}; +const char * const *record_usage = __record_usage; + +/* + * XXX Ideally would be local to cmd_record() and passed to a record__new + * because we need to have access to it in record__exit, that is called + * after cmd_record() exits, but since record_options need to be accessible to + * builtin-script, leave it here. + * + * At least we don't ouch it in all the other functions here directly. + * + * Just say no to tons of global variables, sigh. + */ +static struct record record = { + .opts = { + .sample_time = true, + .mmap_pages = UINT_MAX, + .user_freq = UINT_MAX, + .user_interval = ULLONG_MAX, + .freq = 4000, + .target = { + .uses_mmap = true, + .default_per_cpu = true, + }, + }, + .tool = { + .sample = process_sample_event, + .fork = perf_event__process_fork, + .comm = perf_event__process_comm, + .mmap = perf_event__process_mmap, + .mmap2 = perf_event__process_mmap2, + }, +}; + +#define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: " + +#ifdef HAVE_DWARF_UNWIND_SUPPORT +const char record_callchain_help[] = CALLCHAIN_HELP "fp dwarf lbr"; +#else +const char record_callchain_help[] = CALLCHAIN_HELP "fp lbr"; +#endif + +/* + * XXX Will stay a global variable till we fix builtin-script.c to stop messing + * with it and switch to use the library functions in perf_evlist that came + * from builtin-record.c, i.e. use record_opts, + * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', + * using pipes, etc. + */ +struct option __record_options[] = { + OPT_CALLBACK('e', "event", &record.evlist, "event", + "event selector. use 'perf list' to list available events", + parse_events_option), + OPT_CALLBACK(0, "filter", &record.evlist, "filter", + "event filter", parse_filter), + OPT_STRING('p', "pid", &record.opts.target.pid, "pid", + "record events on existing process id"), + OPT_STRING('t', "tid", &record.opts.target.tid, "tid", + "record events on existing thread id"), + OPT_INTEGER('r', "realtime", &record.realtime_prio, + "collect data with this RT SCHED_FIFO priority"), + OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, + "collect data without buffering"), + OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, + "collect raw sample records from all opened counters"), + OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, + "system-wide collection from all CPUs"), + OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", + "list of cpus to monitor"), + OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), + OPT_STRING('o', "output", &record.file.path, "file", + "output file name"), + OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, + &record.opts.no_inherit_set, + "child tasks do not inherit counters"), + OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), + OPT_CALLBACK('m', "mmap-pages", &record.opts.mmap_pages, "pages", + "number of mmap data pages", + perf_evlist__parse_mmap_pages), + OPT_BOOLEAN(0, "group", &record.opts.group, + "put the counters into a counter group"), + OPT_CALLBACK_NOOPT('g', NULL, &record.opts, + NULL, "enables call-graph recording" , + &record_callchain_opt), + OPT_CALLBACK(0, "call-graph", &record.opts, + "mode[,dump_size]", record_callchain_help, + &record_parse_callchain_opt), + 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", &record.opts.inherit_stat, + "per thread counts"), + OPT_BOOLEAN('d', "data", &record.opts.sample_address, + "Sample addresses"), + OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"), + OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"), + OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, + "don't sample"), + OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache, + "do not update the buildid cache"), + OPT_BOOLEAN('B', "no-buildid", &record.no_buildid, + "do not collect buildids in perf.data"), + OPT_CALLBACK('G', "cgroup", &record.evlist, "name", + "monitor event in cgroup name only", + parse_cgroups), + OPT_UINTEGER('D', "delay", &record.opts.initial_delay, + "ms to wait before starting measurement after program start"), + OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", + "user to profile"), + + OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, + "branch any", "sample any taken branches", + parse_branch_stack), + + OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, + "branch filter mask", "branch stack filter modes", + parse_branch_stack), + OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, + "sample by weight (on special events only)"), + OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, + "sample transaction flags (special events only)"), + OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, + "use per-thread mmaps"), + OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs, + "Sample machine registers on interrupt"), + OPT_BOOLEAN(0, "running-time", &record.opts.running_time, + "Record running/enabled time of read (:S) events"), + OPT_CALLBACK('k', "clockid", &record.opts, + "clockid", "clockid to use for events, see clock_gettime()", + parse_clockid), + OPT_END() +}; + +struct option *record_options = __record_options; + +int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) +{ + int err = -ENOMEM; + struct record *rec = &record; + char errbuf[BUFSIZ]; + + rec->evlist = perf_evlist__new(); + if (rec->evlist == NULL) + return -ENOMEM; + + perf_config(perf_record_config, rec); + + argc = parse_options(argc, argv, record_options, record_usage, + PARSE_OPT_STOP_AT_NON_OPTION); + if (!argc && target__none(&rec->opts.target)) + usage_with_options(record_usage, record_options); + + if (nr_cgroups && !rec->opts.target.system_wide) { + ui__error("cgroup monitoring only available in" + " system-wide mode\n"); + usage_with_options(record_usage, record_options); + } + + symbol__init(NULL); + + 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 (rec->no_buildid_cache || rec->no_buildid) + disable_buildid_cache(); + + if (rec->evlist->nr_entries == 0 && + perf_evlist__add_default(rec->evlist) < 0) { + pr_err("Not enough memory for event selector list\n"); + goto out_symbol_exit; + } + + if (rec->opts.target.tid && !rec->opts.no_inherit_set) + rec->opts.no_inherit = true; + + err = target__validate(&rec->opts.target); + if (err) { + target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); + ui__warning("%s", errbuf); + } + + err = target__parse_uid(&rec->opts.target); + if (err) { + int saved_errno = errno; + + target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); + ui__error("%s", errbuf); + + err = -saved_errno; + goto out_symbol_exit; + } + + err = -ENOMEM; + if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) + usage_with_options(record_usage, record_options); + + if (record_opts__config(&rec->opts)) { + err = -EINVAL; + goto out_symbol_exit; + } + + err = __cmd_record(&record, argc, argv); +out_symbol_exit: + perf_evlist__delete(rec->evlist); + symbol__exit(); + return err; +} |