| #include <linux/kernel.h> |
| #include <traceevent/event-parse.h> |
| |
| #include <byteswap.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| |
| #include "evlist.h" |
| #include "evsel.h" |
| #include "session.h" |
| #include "tool.h" |
| #include "sort.h" |
| #include "util.h" |
| #include "cpumap.h" |
| #include "perf_regs.h" |
| #include "asm/bug.h" |
| #include "auxtrace.h" |
| #include "thread-stack.h" |
| |
| static int perf_session__deliver_event(struct perf_session *session, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct perf_tool *tool, |
| u64 file_offset); |
| |
| static int perf_session__open(struct perf_session *session) |
| { |
| struct perf_data_file *file = session->file; |
| |
| if (perf_session__read_header(session) < 0) { |
| pr_err("incompatible file format (rerun with -v to learn more)\n"); |
| return -1; |
| } |
| |
| if (perf_data_file__is_pipe(file)) |
| return 0; |
| |
| if (!perf_evlist__valid_sample_type(session->evlist)) { |
| pr_err("non matching sample_type\n"); |
| return -1; |
| } |
| |
| if (!perf_evlist__valid_sample_id_all(session->evlist)) { |
| pr_err("non matching sample_id_all\n"); |
| return -1; |
| } |
| |
| if (!perf_evlist__valid_read_format(session->evlist)) { |
| pr_err("non matching read_format\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void perf_session__set_id_hdr_size(struct perf_session *session) |
| { |
| u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); |
| |
| machines__set_id_hdr_size(&session->machines, id_hdr_size); |
| } |
| |
| int perf_session__create_kernel_maps(struct perf_session *session) |
| { |
| int ret = machine__create_kernel_maps(&session->machines.host); |
| |
| if (ret >= 0) |
| ret = machines__create_guest_kernel_maps(&session->machines); |
| return ret; |
| } |
| |
| static void perf_session__destroy_kernel_maps(struct perf_session *session) |
| { |
| machines__destroy_kernel_maps(&session->machines); |
| } |
| |
| static bool perf_session__has_comm_exec(struct perf_session *session) |
| { |
| struct perf_evsel *evsel; |
| |
| evlist__for_each(session->evlist, evsel) { |
| if (evsel->attr.comm_exec) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static void perf_session__set_comm_exec(struct perf_session *session) |
| { |
| bool comm_exec = perf_session__has_comm_exec(session); |
| |
| machines__set_comm_exec(&session->machines, comm_exec); |
| } |
| |
| static int ordered_events__deliver_event(struct ordered_events *oe, |
| struct ordered_event *event) |
| { |
| struct perf_sample sample; |
| struct perf_session *session = container_of(oe, struct perf_session, |
| ordered_events); |
| int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); |
| |
| if (ret) { |
| pr_err("Can't parse sample, err = %d\n", ret); |
| return ret; |
| } |
| |
| return perf_session__deliver_event(session, event->event, &sample, |
| session->tool, event->file_offset); |
| } |
| |
| struct perf_session *perf_session__new(struct perf_data_file *file, |
| bool repipe, struct perf_tool *tool) |
| { |
| struct perf_session *session = zalloc(sizeof(*session)); |
| |
| if (!session) |
| goto out; |
| |
| session->repipe = repipe; |
| session->tool = tool; |
| INIT_LIST_HEAD(&session->auxtrace_index); |
| machines__init(&session->machines); |
| ordered_events__init(&session->ordered_events, ordered_events__deliver_event); |
| |
| if (file) { |
| if (perf_data_file__open(file)) |
| goto out_delete; |
| |
| session->file = file; |
| |
| if (perf_data_file__is_read(file)) { |
| if (perf_session__open(session) < 0) |
| goto out_close; |
| |
| perf_session__set_id_hdr_size(session); |
| perf_session__set_comm_exec(session); |
| } |
| } else { |
| session->machines.host.env = &perf_env; |
| } |
| |
| if (!file || perf_data_file__is_write(file)) { |
| /* |
| * In O_RDONLY mode this will be performed when reading the |
| * kernel MMAP event, in perf_event__process_mmap(). |
| */ |
| if (perf_session__create_kernel_maps(session) < 0) |
| pr_warning("Cannot read kernel map\n"); |
| } |
| |
| if (tool && tool->ordering_requires_timestamps && |
| tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { |
| dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
| tool->ordered_events = false; |
| } |
| |
| return session; |
| |
| out_close: |
| perf_data_file__close(file); |
| out_delete: |
| perf_session__delete(session); |
| out: |
| return NULL; |
| } |
| |
| static void perf_session__delete_threads(struct perf_session *session) |
| { |
| machine__delete_threads(&session->machines.host); |
| } |
| |
| void perf_session__delete(struct perf_session *session) |
| { |
| auxtrace__free(session); |
| auxtrace_index__free(&session->auxtrace_index); |
| perf_session__destroy_kernel_maps(session); |
| perf_session__delete_threads(session); |
| perf_env__exit(&session->header.env); |
| machines__exit(&session->machines); |
| if (session->file) |
| perf_data_file__close(session->file); |
| free(session); |
| } |
| |
| static int process_event_synth_tracing_data_stub(struct perf_tool *tool |
| __maybe_unused, |
| union perf_event *event |
| __maybe_unused, |
| struct perf_session *session |
| __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_evlist **pevlist |
| __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_sample *sample __maybe_unused, |
| struct perf_evsel *evsel __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_event_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_build_id_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_session *session __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct ordered_events *oe __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_finished_round(struct perf_tool *tool, |
| union perf_event *event, |
| struct ordered_events *oe); |
| |
| static int process_id_index_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_session *perf_session |
| __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_session *session __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int skipn(int fd, off_t n) |
| { |
| char buf[4096]; |
| ssize_t ret; |
| |
| while (n > 0) { |
| ret = read(fd, buf, min(n, (off_t)sizeof(buf))); |
| if (ret <= 0) |
| return ret; |
| n -= ret; |
| } |
| |
| return 0; |
| } |
| |
| static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event, |
| struct perf_session *session |
| __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| if (perf_data_file__is_pipe(session->file)) |
| skipn(perf_data_file__fd(session->file), event->auxtrace.size); |
| return event->auxtrace.size; |
| } |
| |
| static |
| int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct perf_session *session __maybe_unused) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| void perf_tool__fill_defaults(struct perf_tool *tool) |
| { |
| if (tool->sample == NULL) |
| tool->sample = process_event_sample_stub; |
| if (tool->mmap == NULL) |
| tool->mmap = process_event_stub; |
| if (tool->mmap2 == NULL) |
| tool->mmap2 = process_event_stub; |
| if (tool->comm == NULL) |
| tool->comm = process_event_stub; |
| if (tool->fork == NULL) |
| tool->fork = process_event_stub; |
| if (tool->exit == NULL) |
| tool->exit = process_event_stub; |
| if (tool->lost == NULL) |
| tool->lost = perf_event__process_lost; |
| if (tool->lost_samples == NULL) |
| tool->lost_samples = perf_event__process_lost_samples; |
| if (tool->aux == NULL) |
| tool->aux = perf_event__process_aux; |
| if (tool->itrace_start == NULL) |
| tool->itrace_start = perf_event__process_itrace_start; |
| if (tool->context_switch == NULL) |
| tool->context_switch = perf_event__process_switch; |
| if (tool->read == NULL) |
| tool->read = process_event_sample_stub; |
| if (tool->throttle == NULL) |
| tool->throttle = process_event_stub; |
| if (tool->unthrottle == NULL) |
| tool->unthrottle = process_event_stub; |
| if (tool->attr == NULL) |
| tool->attr = process_event_synth_attr_stub; |
| if (tool->tracing_data == NULL) |
| tool->tracing_data = process_event_synth_tracing_data_stub; |
| if (tool->build_id == NULL) |
| tool->build_id = process_build_id_stub; |
| if (tool->finished_round == NULL) { |
| if (tool->ordered_events) |
| tool->finished_round = process_finished_round; |
| else |
| tool->finished_round = process_finished_round_stub; |
| } |
| if (tool->id_index == NULL) |
| tool->id_index = process_id_index_stub; |
| if (tool->auxtrace_info == NULL) |
| tool->auxtrace_info = process_event_auxtrace_info_stub; |
| if (tool->auxtrace == NULL) |
| tool->auxtrace = process_event_auxtrace_stub; |
| if (tool->auxtrace_error == NULL) |
| tool->auxtrace_error = process_event_auxtrace_error_stub; |
| } |
| |
| static void swap_sample_id_all(union perf_event *event, void *data) |
| { |
| void *end = (void *) event + event->header.size; |
| int size = end - data; |
| |
| BUG_ON(size % sizeof(u64)); |
| mem_bswap_64(data, size); |
| } |
| |
| static void perf_event__all64_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| struct perf_event_header *hdr = &event->header; |
| mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); |
| } |
| |
| static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) |
| { |
| event->comm.pid = bswap_32(event->comm.pid); |
| event->comm.tid = bswap_32(event->comm.tid); |
| |
| if (sample_id_all) { |
| void *data = &event->comm.comm; |
| |
| data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
| swap_sample_id_all(event, data); |
| } |
| } |
| |
| static void perf_event__mmap_swap(union perf_event *event, |
| bool sample_id_all) |
| { |
| event->mmap.pid = bswap_32(event->mmap.pid); |
| event->mmap.tid = bswap_32(event->mmap.tid); |
| event->mmap.start = bswap_64(event->mmap.start); |
| event->mmap.len = bswap_64(event->mmap.len); |
| event->mmap.pgoff = bswap_64(event->mmap.pgoff); |
| |
| if (sample_id_all) { |
| void *data = &event->mmap.filename; |
| |
| data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
| swap_sample_id_all(event, data); |
| } |
| } |
| |
| static void perf_event__mmap2_swap(union perf_event *event, |
| bool sample_id_all) |
| { |
| event->mmap2.pid = bswap_32(event->mmap2.pid); |
| event->mmap2.tid = bswap_32(event->mmap2.tid); |
| event->mmap2.start = bswap_64(event->mmap2.start); |
| event->mmap2.len = bswap_64(event->mmap2.len); |
| event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); |
| event->mmap2.maj = bswap_32(event->mmap2.maj); |
| event->mmap2.min = bswap_32(event->mmap2.min); |
| event->mmap2.ino = bswap_64(event->mmap2.ino); |
| |
| if (sample_id_all) { |
| void *data = &event->mmap2.filename; |
| |
| data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
| swap_sample_id_all(event, data); |
| } |
| } |
| static void perf_event__task_swap(union perf_event *event, bool sample_id_all) |
| { |
| event->fork.pid = bswap_32(event->fork.pid); |
| event->fork.tid = bswap_32(event->fork.tid); |
| event->fork.ppid = bswap_32(event->fork.ppid); |
| event->fork.ptid = bswap_32(event->fork.ptid); |
| event->fork.time = bswap_64(event->fork.time); |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->fork + 1); |
| } |
| |
| static void perf_event__read_swap(union perf_event *event, bool sample_id_all) |
| { |
| event->read.pid = bswap_32(event->read.pid); |
| event->read.tid = bswap_32(event->read.tid); |
| event->read.value = bswap_64(event->read.value); |
| event->read.time_enabled = bswap_64(event->read.time_enabled); |
| event->read.time_running = bswap_64(event->read.time_running); |
| event->read.id = bswap_64(event->read.id); |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->read + 1); |
| } |
| |
| static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) |
| { |
| event->aux.aux_offset = bswap_64(event->aux.aux_offset); |
| event->aux.aux_size = bswap_64(event->aux.aux_size); |
| event->aux.flags = bswap_64(event->aux.flags); |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->aux + 1); |
| } |
| |
| static void perf_event__itrace_start_swap(union perf_event *event, |
| bool sample_id_all) |
| { |
| event->itrace_start.pid = bswap_32(event->itrace_start.pid); |
| event->itrace_start.tid = bswap_32(event->itrace_start.tid); |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->itrace_start + 1); |
| } |
| |
| static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) |
| { |
| if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { |
| event->context_switch.next_prev_pid = |
| bswap_32(event->context_switch.next_prev_pid); |
| event->context_switch.next_prev_tid = |
| bswap_32(event->context_switch.next_prev_tid); |
| } |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->context_switch + 1); |
| } |
| |
| static void perf_event__throttle_swap(union perf_event *event, |
| bool sample_id_all) |
| { |
| event->throttle.time = bswap_64(event->throttle.time); |
| event->throttle.id = bswap_64(event->throttle.id); |
| event->throttle.stream_id = bswap_64(event->throttle.stream_id); |
| |
| if (sample_id_all) |
| swap_sample_id_all(event, &event->throttle + 1); |
| } |
| |
| static u8 revbyte(u8 b) |
| { |
| int rev = (b >> 4) | ((b & 0xf) << 4); |
| rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); |
| rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); |
| return (u8) rev; |
| } |
| |
| /* |
| * XXX this is hack in attempt to carry flags bitfield |
| * throught endian village. ABI says: |
| * |
| * Bit-fields are allocated from right to left (least to most significant) |
| * on little-endian implementations and from left to right (most to least |
| * significant) on big-endian implementations. |
| * |
| * The above seems to be byte specific, so we need to reverse each |
| * byte of the bitfield. 'Internet' also says this might be implementation |
| * specific and we probably need proper fix and carry perf_event_attr |
| * bitfield flags in separate data file FEAT_ section. Thought this seems |
| * to work for now. |
| */ |
| static void swap_bitfield(u8 *p, unsigned len) |
| { |
| unsigned i; |
| |
| for (i = 0; i < len; i++) { |
| *p = revbyte(*p); |
| p++; |
| } |
| } |
| |
| /* exported for swapping attributes in file header */ |
| void perf_event__attr_swap(struct perf_event_attr *attr) |
| { |
| attr->type = bswap_32(attr->type); |
| attr->size = bswap_32(attr->size); |
| |
| #define bswap_safe(f, n) \ |
| (attr->size > (offsetof(struct perf_event_attr, f) + \ |
| sizeof(attr->f) * (n))) |
| #define bswap_field(f, sz) \ |
| do { \ |
| if (bswap_safe(f, 0)) \ |
| attr->f = bswap_##sz(attr->f); \ |
| } while(0) |
| #define bswap_field_32(f) bswap_field(f, 32) |
| #define bswap_field_64(f) bswap_field(f, 64) |
| |
| bswap_field_64(config); |
| bswap_field_64(sample_period); |
| bswap_field_64(sample_type); |
| bswap_field_64(read_format); |
| bswap_field_32(wakeup_events); |
| bswap_field_32(bp_type); |
| bswap_field_64(bp_addr); |
| bswap_field_64(bp_len); |
| bswap_field_64(branch_sample_type); |
| bswap_field_64(sample_regs_user); |
| bswap_field_32(sample_stack_user); |
| bswap_field_32(aux_watermark); |
| |
| /* |
| * After read_format are bitfields. Check read_format because |
| * we are unable to use offsetof on bitfield. |
| */ |
| if (bswap_safe(read_format, 1)) |
| swap_bitfield((u8 *) (&attr->read_format + 1), |
| sizeof(u64)); |
| #undef bswap_field_64 |
| #undef bswap_field_32 |
| #undef bswap_field |
| #undef bswap_safe |
| } |
| |
| static void perf_event__hdr_attr_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| size_t size; |
| |
| perf_event__attr_swap(&event->attr.attr); |
| |
| size = event->header.size; |
| size -= (void *)&event->attr.id - (void *)event; |
| mem_bswap_64(event->attr.id, size); |
| } |
| |
| static void perf_event__event_type_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| event->event_type.event_type.event_id = |
| bswap_64(event->event_type.event_type.event_id); |
| } |
| |
| static void perf_event__tracing_data_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| event->tracing_data.size = bswap_32(event->tracing_data.size); |
| } |
| |
| static void perf_event__auxtrace_info_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| size_t size; |
| |
| event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); |
| |
| size = event->header.size; |
| size -= (void *)&event->auxtrace_info.priv - (void *)event; |
| mem_bswap_64(event->auxtrace_info.priv, size); |
| } |
| |
| static void perf_event__auxtrace_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| event->auxtrace.size = bswap_64(event->auxtrace.size); |
| event->auxtrace.offset = bswap_64(event->auxtrace.offset); |
| event->auxtrace.reference = bswap_64(event->auxtrace.reference); |
| event->auxtrace.idx = bswap_32(event->auxtrace.idx); |
| event->auxtrace.tid = bswap_32(event->auxtrace.tid); |
| event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); |
| } |
| |
| static void perf_event__auxtrace_error_swap(union perf_event *event, |
| bool sample_id_all __maybe_unused) |
| { |
| event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); |
| event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); |
| event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); |
| event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); |
| event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); |
| event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); |
| } |
| |
| typedef void (*perf_event__swap_op)(union perf_event *event, |
| bool sample_id_all); |
| |
| static perf_event__swap_op perf_event__swap_ops[] = { |
| [PERF_RECORD_MMAP] = perf_event__mmap_swap, |
| [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, |
| [PERF_RECORD_COMM] = perf_event__comm_swap, |
| [PERF_RECORD_FORK] = perf_event__task_swap, |
| [PERF_RECORD_EXIT] = perf_event__task_swap, |
| [PERF_RECORD_LOST] = perf_event__all64_swap, |
| [PERF_RECORD_READ] = perf_event__read_swap, |
| [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, |
| [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, |
| [PERF_RECORD_SAMPLE] = perf_event__all64_swap, |
| [PERF_RECORD_AUX] = perf_event__aux_swap, |
| [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, |
| [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, |
| [PERF_RECORD_SWITCH] = perf_event__switch_swap, |
| [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, |
| [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, |
| [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, |
| [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, |
| [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
| [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, |
| [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, |
| [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, |
| [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, |
| [PERF_RECORD_HEADER_MAX] = NULL, |
| }; |
| |
| /* |
| * When perf record finishes a pass on every buffers, it records this pseudo |
| * event. |
| * We record the max timestamp t found in the pass n. |
| * Assuming these timestamps are monotonic across cpus, we know that if |
| * a buffer still has events with timestamps below t, they will be all |
| * available and then read in the pass n + 1. |
| * Hence when we start to read the pass n + 2, we can safely flush every |
| * events with timestamps below t. |
| * |
| * ============ PASS n ================= |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 1 | 2 |
| * 2 | 3 |
| * - | 4 <--- max recorded |
| * |
| * ============ PASS n + 1 ============== |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 3 | 5 |
| * 4 | 6 |
| * 5 | 7 <---- max recorded |
| * |
| * Flush every events below timestamp 4 |
| * |
| * ============ PASS n + 2 ============== |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 6 | 8 |
| * 7 | 9 |
| * - | 10 |
| * |
| * Flush every events below timestamp 7 |
| * etc... |
| */ |
| static int process_finished_round(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct ordered_events *oe) |
| { |
| if (dump_trace) |
| fprintf(stdout, "\n"); |
| return ordered_events__flush(oe, OE_FLUSH__ROUND); |
| } |
| |
| int perf_session__queue_event(struct perf_session *s, union perf_event *event, |
| struct perf_sample *sample, u64 file_offset) |
| { |
| return ordered_events__queue(&s->ordered_events, event, sample, file_offset); |
| } |
| |
| static void callchain__lbr_callstack_printf(struct perf_sample *sample) |
| { |
| struct ip_callchain *callchain = sample->callchain; |
| struct branch_stack *lbr_stack = sample->branch_stack; |
| u64 kernel_callchain_nr = callchain->nr; |
| unsigned int i; |
| |
| for (i = 0; i < kernel_callchain_nr; i++) { |
| if (callchain->ips[i] == PERF_CONTEXT_USER) |
| break; |
| } |
| |
| if ((i != kernel_callchain_nr) && lbr_stack->nr) { |
| u64 total_nr; |
| /* |
| * LBR callstack can only get user call chain, |
| * i is kernel call chain number, |
| * 1 is PERF_CONTEXT_USER. |
| * |
| * The user call chain is stored in LBR registers. |
| * LBR are pair registers. The caller is stored |
| * in "from" register, while the callee is stored |
| * in "to" register. |
| * For example, there is a call stack |
| * "A"->"B"->"C"->"D". |
| * The LBR registers will recorde like |
| * "C"->"D", "B"->"C", "A"->"B". |
| * So only the first "to" register and all "from" |
| * registers are needed to construct the whole stack. |
| */ |
| total_nr = i + 1 + lbr_stack->nr + 1; |
| kernel_callchain_nr = i + 1; |
| |
| printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); |
| |
| for (i = 0; i < kernel_callchain_nr; i++) |
| printf("..... %2d: %016" PRIx64 "\n", |
| i, callchain->ips[i]); |
| |
| printf("..... %2d: %016" PRIx64 "\n", |
| (int)(kernel_callchain_nr), lbr_stack->entries[0].to); |
| for (i = 0; i < lbr_stack->nr; i++) |
| printf("..... %2d: %016" PRIx64 "\n", |
| (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); |
| } |
| } |
| |
| static void callchain__printf(struct perf_evsel *evsel, |
| struct perf_sample *sample) |
| { |
| unsigned int i; |
| struct ip_callchain *callchain = sample->callchain; |
| |
| if (has_branch_callstack(evsel)) |
| callchain__lbr_callstack_printf(sample); |
| |
| printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); |
| |
| for (i = 0; i < callchain->nr; i++) |
| printf("..... %2d: %016" PRIx64 "\n", |
| i, callchain->ips[i]); |
| } |
| |
| static void branch_stack__printf(struct perf_sample *sample) |
| { |
| uint64_t i; |
| |
| printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); |
| |
| for (i = 0; i < sample->branch_stack->nr; i++) { |
| struct branch_entry *e = &sample->branch_stack->entries[i]; |
| |
| printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", |
| i, e->from, e->to, |
| e->flags.cycles, |
| e->flags.mispred ? "M" : " ", |
| e->flags.predicted ? "P" : " ", |
| e->flags.abort ? "A" : " ", |
| e->flags.in_tx ? "T" : " ", |
| (unsigned)e->flags.reserved); |
| } |
| } |
| |
| static void regs_dump__printf(u64 mask, u64 *regs) |
| { |
| unsigned rid, i = 0; |
| |
| for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { |
| u64 val = regs[i++]; |
| |
| printf(".... %-5s 0x%" PRIx64 "\n", |
| perf_reg_name(rid), val); |
| } |
| } |
| |
| static const char *regs_abi[] = { |
| [PERF_SAMPLE_REGS_ABI_NONE] = "none", |
| [PERF_SAMPLE_REGS_ABI_32] = "32-bit", |
| [PERF_SAMPLE_REGS_ABI_64] = "64-bit", |
| }; |
| |
| static inline const char *regs_dump_abi(struct regs_dump *d) |
| { |
| if (d->abi > PERF_SAMPLE_REGS_ABI_64) |
| return "unknown"; |
| |
| return regs_abi[d->abi]; |
| } |
| |
| static void regs__printf(const char *type, struct regs_dump *regs) |
| { |
| u64 mask = regs->mask; |
| |
| printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", |
| type, |
| mask, |
| regs_dump_abi(regs)); |
| |
| regs_dump__printf(mask, regs->regs); |
| } |
| |
| static void regs_user__printf(struct perf_sample *sample) |
| { |
| struct regs_dump *user_regs = &sample->user_regs; |
| |
| if (user_regs->regs) |
| regs__printf("user", user_regs); |
| } |
| |
| static void regs_intr__printf(struct perf_sample *sample) |
| { |
| struct regs_dump *intr_regs = &sample->intr_regs; |
| |
| if (intr_regs->regs) |
| regs__printf("intr", intr_regs); |
| } |
| |
| static void stack_user__printf(struct stack_dump *dump) |
| { |
| printf("... ustack: size %" PRIu64 ", offset 0x%x\n", |
| dump->size, dump->offset); |
| } |
| |
| static void perf_evlist__print_tstamp(struct perf_evlist *evlist, |
| union perf_event *event, |
| struct perf_sample *sample) |
| { |
| u64 sample_type = __perf_evlist__combined_sample_type(evlist); |
| |
| if (event->header.type != PERF_RECORD_SAMPLE && |
| !perf_evlist__sample_id_all(evlist)) { |
| fputs("-1 -1 ", stdout); |
| return; |
| } |
| |
| if ((sample_type & PERF_SAMPLE_CPU)) |
| printf("%u ", sample->cpu); |
| |
| if (sample_type & PERF_SAMPLE_TIME) |
| printf("%" PRIu64 " ", sample->time); |
| } |
| |
| static void sample_read__printf(struct perf_sample *sample, u64 read_format) |
| { |
| printf("... sample_read:\n"); |
| |
| if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
| printf("...... time enabled %016" PRIx64 "\n", |
| sample->read.time_enabled); |
| |
| if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
| printf("...... time running %016" PRIx64 "\n", |
| sample->read.time_running); |
| |
| if (read_format & PERF_FORMAT_GROUP) { |
| u64 i; |
| |
| printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); |
| |
| for (i = 0; i < sample->read.group.nr; i++) { |
| struct sample_read_value *value; |
| |
| value = &sample->read.group.values[i]; |
| printf("..... id %016" PRIx64 |
| ", value %016" PRIx64 "\n", |
| value->id, value->value); |
| } |
| } else |
| printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", |
| sample->read.one.id, sample->read.one.value); |
| } |
| |
| static void dump_event(struct perf_evlist *evlist, union perf_event *event, |
| u64 file_offset, struct perf_sample *sample) |
| { |
| if (!dump_trace) |
| return; |
| |
| printf("\n%#" PRIx64 " [%#x]: event: %d\n", |
| file_offset, event->header.size, event->header.type); |
| |
| trace_event(event); |
| |
| if (sample) |
| perf_evlist__print_tstamp(evlist, event, sample); |
| |
| printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, |
| event->header.size, perf_event__name(event->header.type)); |
| } |
| |
| static void dump_sample(struct perf_evsel *evsel, union perf_event *event, |
| struct perf_sample *sample) |
| { |
| u64 sample_type; |
| |
| if (!dump_trace) |
| return; |
| |
| printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", |
| event->header.misc, sample->pid, sample->tid, sample->ip, |
| sample->period, sample->addr); |
| |
| sample_type = evsel->attr.sample_type; |
| |
| if (sample_type & PERF_SAMPLE_CALLCHAIN) |
| callchain__printf(evsel, sample); |
| |
| if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel)) |
| branch_stack__printf(sample); |
| |
| if (sample_type & PERF_SAMPLE_REGS_USER) |
| regs_user__printf(sample); |
| |
| if (sample_type & PERF_SAMPLE_REGS_INTR) |
| regs_intr__printf(sample); |
| |
| if (sample_type & PERF_SAMPLE_STACK_USER) |
| stack_user__printf(&sample->user_stack); |
| |
| if (sample_type & PERF_SAMPLE_WEIGHT) |
| printf("... weight: %" PRIu64 "\n", sample->weight); |
| |
| if (sample_type & PERF_SAMPLE_DATA_SRC) |
| printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); |
| |
| if (sample_type & PERF_SAMPLE_TRANSACTION) |
| printf("... transaction: %" PRIx64 "\n", sample->transaction); |
| |
| if (sample_type & PERF_SAMPLE_READ) |
| sample_read__printf(sample, evsel->attr.read_format); |
| } |
| |
| static struct machine *machines__find_for_cpumode(struct machines *machines, |
| union perf_event *event, |
| struct perf_sample *sample) |
| { |
| const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
| struct machine *machine; |
| |
| if (perf_guest && |
| ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || |
| (cpumode == PERF_RECORD_MISC_GUEST_USER))) { |
| u32 pid; |
| |
| if (event->header.type == PERF_RECORD_MMAP |
| || event->header.type == PERF_RECORD_MMAP2) |
| pid = event->mmap.pid; |
| else |
| pid = sample->pid; |
| |
| machine = machines__find(machines, pid); |
| if (!machine) |
| machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID); |
| return machine; |
| } |
| |
| return &machines->host; |
| } |
| |
| static int deliver_sample_value(struct perf_evlist *evlist, |
| struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct sample_read_value *v, |
| struct machine *machine) |
| { |
| struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); |
| |
| if (sid) { |
| sample->id = v->id; |
| sample->period = v->value - sid->period; |
| sid->period = v->value; |
| } |
| |
| if (!sid || sid->evsel == NULL) { |
| ++evlist->stats.nr_unknown_id; |
| return 0; |
| } |
| |
| return tool->sample(tool, event, sample, sid->evsel, machine); |
| } |
| |
| static int deliver_sample_group(struct perf_evlist *evlist, |
| struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| int ret = -EINVAL; |
| u64 i; |
| |
| for (i = 0; i < sample->read.group.nr; i++) { |
| ret = deliver_sample_value(evlist, tool, event, sample, |
| &sample->read.group.values[i], |
| machine); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int |
| perf_evlist__deliver_sample(struct perf_evlist *evlist, |
| struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct perf_evsel *evsel, |
| struct machine *machine) |
| { |
| /* We know evsel != NULL. */ |
| u64 sample_type = evsel->attr.sample_type; |
| u64 read_format = evsel->attr.read_format; |
| |
| /* Standard sample delievery. */ |
| if (!(sample_type & PERF_SAMPLE_READ)) |
| return tool->sample(tool, event, sample, evsel, machine); |
| |
| /* For PERF_SAMPLE_READ we have either single or group mode. */ |
| if (read_format & PERF_FORMAT_GROUP) |
| return deliver_sample_group(evlist, tool, event, sample, |
| machine); |
| else |
| return deliver_sample_value(evlist, tool, event, sample, |
| &sample->read.one, machine); |
| } |
| |
| static int machines__deliver_event(struct machines *machines, |
| struct perf_evlist *evlist, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct perf_tool *tool, u64 file_offset) |
| { |
| struct perf_evsel *evsel; |
| struct machine *machine; |
| |
| dump_event(evlist, event, file_offset, sample); |
| |
| evsel = perf_evlist__id2evsel(evlist, sample->id); |
| |
| machine = machines__find_for_cpumode(machines, event, sample); |
| |
| switch (event->header.type) { |
| case PERF_RECORD_SAMPLE: |
| if (evsel == NULL) { |
| ++evlist->stats.nr_unknown_id; |
| return 0; |
| } |
| dump_sample(evsel, event, sample); |
| if (machine == NULL) { |
| ++evlist->stats.nr_unprocessable_samples; |
| return 0; |
| } |
| return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); |
| case PERF_RECORD_MMAP: |
| return tool->mmap(tool, event, sample, machine); |
| case PERF_RECORD_MMAP2: |
| if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) |
| ++evlist->stats.nr_proc_map_timeout; |
| return tool->mmap2(tool, event, sample, machine); |
| case PERF_RECORD_COMM: |
| return tool->comm(tool, event, sample, machine); |
| case PERF_RECORD_FORK: |
| return tool->fork(tool, event, sample, machine); |
| case PERF_RECORD_EXIT: |
| return tool->exit(tool, event, sample, machine); |
| case PERF_RECORD_LOST: |
| if (tool->lost == perf_event__process_lost) |
| evlist->stats.total_lost += event->lost.lost; |
| return tool->lost(tool, event, sample, machine); |
| case PERF_RECORD_LOST_SAMPLES: |
| if (tool->lost_samples == perf_event__process_lost_samples) |
| evlist->stats.total_lost_samples += event->lost_samples.lost; |
| return tool->lost_samples(tool, event, sample, machine); |
| case PERF_RECORD_READ: |
| return tool->read(tool, event, sample, evsel, machine); |
| case PERF_RECORD_THROTTLE: |
| return tool->throttle(tool, event, sample, machine); |
| case PERF_RECORD_UNTHROTTLE: |
| return tool->unthrottle(tool, event, sample, machine); |
| case PERF_RECORD_AUX: |
| if (tool->aux == perf_event__process_aux && |
| (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)) |
| evlist->stats.total_aux_lost += 1; |
| return tool->aux(tool, event, sample, machine); |
| case PERF_RECORD_ITRACE_START: |
| return tool->itrace_start(tool, event, sample, machine); |
| case PERF_RECORD_SWITCH: |
| case PERF_RECORD_SWITCH_CPU_WIDE: |
| return tool->context_switch(tool, event, sample, machine); |
| default: |
| ++evlist->stats.nr_unknown_events; |
| return -1; |
| } |
| } |
| |
| static int perf_session__deliver_event(struct perf_session *session, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct perf_tool *tool, |
| u64 file_offset) |
| { |
| int ret; |
| |
| ret = auxtrace__process_event(session, event, sample, tool); |
| if (ret < 0) |
| return ret; |
| if (ret > 0) |
| return 0; |
| |
| return machines__deliver_event(&session->machines, session->evlist, |
| event, sample, tool, file_offset); |
| } |
| |
| static s64 perf_session__process_user_event(struct perf_session *session, |
| union perf_event *event, |
| u64 file_offset) |
| { |
| struct ordered_events *oe = &session->ordered_events; |
| struct perf_tool *tool = session->tool; |
| int fd = perf_data_file__fd(session->file); |
| int err; |
| |
| dump_event(session->evlist, event, file_offset, NULL); |
| |
| /* These events are processed right away */ |
| switch (event->header.type) { |
| case PERF_RECORD_HEADER_ATTR: |
| err = tool->attr(tool, event, &session->evlist); |
| if (err == 0) { |
| perf_session__set_id_hdr_size(session); |
| perf_session__set_comm_exec(session); |
| } |
| return err; |
| case PERF_RECORD_HEADER_EVENT_TYPE: |
| /* |
| * Depreceated, but we need to handle it for sake |
| * of old data files create in pipe mode. |
| */ |
| return 0; |
| case PERF_RECORD_HEADER_TRACING_DATA: |
| /* setup for reading amidst mmap */ |
| lseek(fd, file_offset, SEEK_SET); |
| return tool->tracing_data(tool, event, session); |
| case PERF_RECORD_HEADER_BUILD_ID: |
| return tool->build_id(tool, event, session); |
| case PERF_RECORD_FINISHED_ROUND: |
| return tool->finished_round(tool, event, oe); |
| case PERF_RECORD_ID_INDEX: |
| return tool->id_index(tool, event, session); |
| case PERF_RECORD_AUXTRACE_INFO: |
| return tool->auxtrace_info(tool, event, session); |
| case PERF_RECORD_AUXTRACE: |
| /* setup for reading amidst mmap */ |
| lseek(fd, file_offset + event->header.size, SEEK_SET); |
| return tool->auxtrace(tool, event, session); |
| case PERF_RECORD_AUXTRACE_ERROR: |
| perf_session__auxtrace_error_inc(session, event); |
| return tool->auxtrace_error(tool, event, session); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| int perf_session__deliver_synth_event(struct perf_session *session, |
| union perf_event *event, |
| struct perf_sample *sample) |
| { |
| struct perf_evlist *evlist = session->evlist; |
| struct perf_tool *tool = session->tool; |
| |
| events_stats__inc(&evlist->stats, event->header.type); |
| |
| if (event->header.type >= PERF_RECORD_USER_TYPE_START) |
| return perf_session__process_user_event(session, event, 0); |
| |
| return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); |
| } |
| |
| static void event_swap(union perf_event *event, bool sample_id_all) |
| { |
| perf_event__swap_op swap; |
| |
| swap = perf_event__swap_ops[event->header.type]; |
| if (swap) |
| swap(event, sample_id_all); |
| } |
| |
| int perf_session__peek_event(struct perf_session *session, off_t file_offset, |
| void *buf, size_t buf_sz, |
| union perf_event **event_ptr, |
| struct perf_sample *sample) |
| { |
| union perf_event *event; |
| size_t hdr_sz, rest; |
| int fd; |
| |
| if (session->one_mmap && !session->header.needs_swap) { |
| event = file_offset - session->one_mmap_offset + |
| session->one_mmap_addr; |
| goto out_parse_sample; |
| } |
| |
| if (perf_data_file__is_pipe(session->file)) |
| return -1; |
| |
| fd = perf_data_file__fd(session->file); |
| hdr_sz = sizeof(struct perf_event_header); |
| |
| if (buf_sz < hdr_sz) |
| return -1; |
| |
| if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || |
| readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) |
| return -1; |
| |
| event = (union perf_event *)buf; |
| |
| if (session->header.needs_swap) |
| perf_event_header__bswap(&event->header); |
| |
| if (event->header.size < hdr_sz || event->header.size > buf_sz) |
| return -1; |
| |
| rest = event->header.size - hdr_sz; |
| |
| if (readn(fd, buf, rest) != (ssize_t)rest) |
| return -1; |
| |
| if (session->header.needs_swap) |
| event_swap(event, perf_evlist__sample_id_all(session->evlist)); |
| |
| out_parse_sample: |
| |
| if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && |
| perf_evlist__parse_sample(session->evlist, event, sample)) |
| return -1; |
| |
| *event_ptr = event; |
| |
| return 0; |
| } |
| |
| static s64 perf_session__process_event(struct perf_session *session, |
| union perf_event *event, u64 file_offset) |
| { |
| struct perf_evlist *evlist = session->evlist; |
| struct perf_tool *tool = session->tool; |
| struct perf_sample sample; |
| int ret; |
| |
| if (session->header.needs_swap) |
| event_swap(event, perf_evlist__sample_id_all(evlist)); |
| |
| if (event->header.type >= PERF_RECORD_HEADER_MAX) |
| return -EINVAL; |
| |
| events_stats__inc(&evlist->stats, event->header.type); |
| |
| if (event->header.type >= PERF_RECORD_USER_TYPE_START) |
| return perf_session__process_user_event(session, event, file_offset); |
| |
| /* |
| * For all kernel events we get the sample data |
| */ |
| ret = perf_evlist__parse_sample(evlist, event, &sample); |
| if (ret) |
| return ret; |
| |
| if (tool->ordered_events) { |
| ret = perf_session__queue_event(session, event, &sample, file_offset); |
| if (ret != -ETIME) |
| return ret; |
| } |
| |
| return perf_session__deliver_event(session, event, &sample, tool, |
| file_offset); |
| } |
| |
| void perf_event_header__bswap(struct perf_event_header *hdr) |
| { |
| hdr->type = bswap_32(hdr->type); |
| hdr->misc = bswap_16(hdr->misc); |
| hdr->size = bswap_16(hdr->size); |
| } |
| |
| struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) |
| { |
| return machine__findnew_thread(&session->machines.host, -1, pid); |
| } |
| |
| int perf_session__register_idle_thread(struct perf_session *session) |
| { |
| struct thread *thread; |
| int err = 0; |
| |
| thread = machine__findnew_thread(&session->machines.host, 0, 0); |
| if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { |
| pr_err("problem inserting idle task.\n"); |
| err = -1; |
| } |
| |
| /* machine__findnew_thread() got the thread, so put it */ |
| thread__put(thread); |
| return err; |
| } |
| |
| static void perf_session__warn_about_errors(const struct perf_session *session) |
| { |
| const struct events_stats *stats = &session->evlist->stats; |
| const struct ordered_events *oe = &session->ordered_events; |
| |
| if (session->tool->lost == perf_event__process_lost && |
| stats->nr_events[PERF_RECORD_LOST] != 0) { |
| ui__warning("Processed %d events and lost %d chunks!\n\n" |
| "Check IO/CPU overload!\n\n", |
| stats->nr_events[0], |
| stats->nr_events[PERF_RECORD_LOST]); |
| } |
| |
| if (session->tool->lost_samples == perf_event__process_lost_samples) { |
| double drop_rate; |
| |
| drop_rate = (double)stats->total_lost_samples / |
| (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); |
| if (drop_rate > 0.05) { |
| ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", |
| stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, |
| drop_rate * 100.0); |
| } |
| } |
| |
| if (session->tool->aux == perf_event__process_aux && |
| stats->total_aux_lost != 0) { |
| ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", |
| stats->total_aux_lost, |
| stats->nr_events[PERF_RECORD_AUX]); |
| } |
| |
| if (stats->nr_unknown_events != 0) { |
| ui__warning("Found %u unknown events!\n\n" |
| "Is this an older tool processing a perf.data " |
| "file generated by a more recent tool?\n\n" |
| "If that is not the case, consider " |
| "reporting to linux-kernel@vger.kernel.org.\n\n", |
| stats->nr_unknown_events); |
| } |
| |
| if (stats->nr_unknown_id != 0) { |
| ui__warning("%u samples with id not present in the header\n", |
| stats->nr_unknown_id); |
| } |
| |
| if (stats->nr_invalid_chains != 0) { |
| ui__warning("Found invalid callchains!\n\n" |
| "%u out of %u events were discarded for this reason.\n\n" |
| "Consider reporting to linux-kernel@vger.kernel.org.\n\n", |
| stats->nr_invalid_chains, |
| stats->nr_events[PERF_RECORD_SAMPLE]); |
| } |
| |
| if (stats->nr_unprocessable_samples != 0) { |
| ui__warning("%u unprocessable samples recorded.\n" |
| "Do you have a KVM guest running and not using 'perf kvm'?\n", |
| stats->nr_unprocessable_samples); |
| } |
| |
| if (oe->nr_unordered_events != 0) |
| ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); |
| |
| events_stats__auxtrace_error_warn(stats); |
| |
| if (stats->nr_proc_map_timeout != 0) { |
| ui__warning("%d map information files for pre-existing threads were\n" |
| "not processed, if there are samples for addresses they\n" |
| "will not be resolved, you may find out which are these\n" |
| "threads by running with -v and redirecting the output\n" |
| "to a file.\n" |
| "The time limit to process proc map is too short?\n" |
| "Increase it by --proc-map-timeout\n", |
| stats->nr_proc_map_timeout); |
| } |
| } |
| |
| static int perf_session__flush_thread_stack(struct thread *thread, |
| void *p __maybe_unused) |
| { |
| return thread_stack__flush(thread); |
| } |
| |
| static int perf_session__flush_thread_stacks(struct perf_session *session) |
| { |
| return machines__for_each_thread(&session->machines, |
| perf_session__flush_thread_stack, |
| NULL); |
| } |
| |
| volatile int session_done; |
| |
| static int __perf_session__process_pipe_events(struct perf_session *session) |
| { |
| struct ordered_events *oe = &session->ordered_events; |
| struct perf_tool *tool = session->tool; |
| int fd = perf_data_file__fd(session->file); |
| union perf_event *event; |
| uint32_t size, cur_size = 0; |
| void *buf = NULL; |
| s64 skip = 0; |
| u64 head; |
| ssize_t err; |
| void *p; |
| |
| perf_tool__fill_defaults(tool); |
| |
| head = 0; |
| cur_size = sizeof(union perf_event); |
| |
| buf = malloc(cur_size); |
| if (!buf) |
| return -errno; |
| more: |
| event = buf; |
| err = readn(fd, event, sizeof(struct perf_event_header)); |
| if (err <= 0) { |
| if (err == 0) |
| goto done; |
| |
| pr_err("failed to read event header\n"); |
| goto out_err; |
| } |
| |
| if (session->header.needs_swap) |
| perf_event_header__bswap(&event->header); |
| |
| size = event->header.size; |
| if (size < sizeof(struct perf_event_header)) { |
| pr_err("bad event header size\n"); |
| goto out_err; |
| } |
| |
| if (size > cur_size) { |
| void *new = realloc(buf, size); |
| if (!new) { |
| pr_err("failed to allocate memory to read event\n"); |
| goto out_err; |
| } |
| buf = new; |
| cur_size = size; |
| event = buf; |
| } |
| p = event; |
| p += sizeof(struct perf_event_header); |
| |
| if (size - sizeof(struct perf_event_header)) { |
| err = readn(fd, p, size - sizeof(struct perf_event_header)); |
| if (err <= 0) { |
| if (err == 0) { |
| pr_err("unexpected end of event stream\n"); |
| goto done; |
| } |
| |
| pr_err("failed to read event data\n"); |
| goto out_err; |
| } |
| } |
| |
| if ((skip = perf_session__process_event(session, event, head)) < 0) { |
| pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
| head, event->header.size, event->header.type); |
| err = -EINVAL; |
| goto out_err; |
| } |
| |
| head += size; |
| |
| if (skip > 0) |
| head += skip; |
| |
| if (!session_done()) |
| goto more; |
| done: |
| /* do the final flush for ordered samples */ |
| err = ordered_events__flush(oe, OE_FLUSH__FINAL); |
| if (err) |
| goto out_err; |
| err = auxtrace__flush_events(session, tool); |
| if (err) |
| goto out_err; |
| err = perf_session__flush_thread_stacks(session); |
| out_err: |
| free(buf); |
| perf_session__warn_about_errors(session); |
| ordered_events__free(&session->ordered_events); |
| auxtrace__free_events(session); |
| return err; |
| } |
| |
| static union perf_event * |
| fetch_mmaped_event(struct perf_session *session, |
| u64 head, size_t mmap_size, char *buf) |
| { |
| union perf_event *event; |
| |
| /* |
| * Ensure we have enough space remaining to read |
| * the size of the event in the headers. |
| */ |
| if (head + sizeof(event->header) > mmap_size) |
| return NULL; |
| |
| event = (union perf_event *)(buf + head); |
| |
| if (session->header.needs_swap) |
| perf_event_header__bswap(&event->header); |
| |
| if (head + event->header.size > mmap_size) { |
| /* We're not fetching the event so swap back again */ |
| if (session->header.needs_swap) |
| perf_event_header__bswap(&event->header); |
| return NULL; |
| } |
| |
| return event; |
| } |
| |
| /* |
| * On 64bit we can mmap the data file in one go. No need for tiny mmap |
| * slices. On 32bit we use 32MB. |
| */ |
| #if BITS_PER_LONG == 64 |
| #define MMAP_SIZE ULLONG_MAX |
| #define NUM_MMAPS 1 |
| #else |
| #define MMAP_SIZE (32 * 1024 * 1024ULL) |
| #define NUM_MMAPS 128 |
| #endif |
| |
| static int __perf_session__process_events(struct perf_session *session, |
| u64 data_offset, u64 data_size, |
| u64 file_size) |
| { |
| struct ordered_events *oe = &session->ordered_events; |
| struct perf_tool *tool = session->tool; |
| int fd = perf_data_file__fd(session->file); |
| u64 head, page_offset, file_offset, file_pos, size; |
| int err, mmap_prot, mmap_flags, map_idx = 0; |
| size_t mmap_size; |
| char *buf, *mmaps[NUM_MMAPS]; |
| union perf_event *event; |
| struct ui_progress prog; |
| s64 skip; |
| |
| perf_tool__fill_defaults(tool); |
| |
| page_offset = page_size * (data_offset / page_size); |
| file_offset = page_offset; |
| head = data_offset - page_offset; |
| |
| if (data_size == 0) |
| goto out; |
| |
| if (data_offset + data_size < file_size) |
| file_size = data_offset + data_size; |
| |
| ui_progress__init(&prog, file_size, "Processing events..."); |
| |
| mmap_size = MMAP_SIZE; |
| if (mmap_size > file_size) { |
| mmap_size = file_size; |
| session->one_mmap = true; |
| } |
| |
| memset(mmaps, 0, sizeof(mmaps)); |
| |
| mmap_prot = PROT_READ; |
| mmap_flags = MAP_SHARED; |
| |
| if (session->header.needs_swap) { |
| mmap_prot |= PROT_WRITE; |
| mmap_flags = MAP_PRIVATE; |
| } |
| remap: |
| buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, |
| file_offset); |
| if (buf == MAP_FAILED) { |
| pr_err("failed to mmap file\n"); |
| err = -errno; |
| goto out_err; |
| } |
| mmaps[map_idx] = buf; |
| map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); |
| file_pos = file_offset + head; |
| if (session->one_mmap) { |
| session->one_mmap_addr = buf; |
| session->one_mmap_offset = file_offset; |
| } |
| |
| more: |
| event = fetch_mmaped_event(session, head, mmap_size, buf); |
| if (!event) { |
| if (mmaps[map_idx]) { |
| munmap(mmaps[map_idx], mmap_size); |
| mmaps[map_idx] = NULL; |
| } |
| |
| page_offset = page_size * (head / page_size); |
| file_offset += page_offset; |
| head -= page_offset; |
| goto remap; |
| } |
| |
| size = event->header.size; |
| |
| if (size < sizeof(struct perf_event_header) || |
| (skip = perf_session__process_event(session, event, file_pos)) < 0) { |
| pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
| file_offset + head, event->header.size, |
| event->header.type); |
| err = -EINVAL; |
| goto out_err; |
| } |
| |
| if (skip) |
| size += skip; |
| |
| head += size; |
| file_pos += size; |
| |
| ui_progress__update(&prog, size); |
| |
| if (session_done()) |
| goto out; |
| |
| if (file_pos < file_size) |
| goto more; |
| |
| out: |
| /* do the final flush for ordered samples */ |
| err = ordered_events__flush(oe, OE_FLUSH__FINAL); |
| if (err) |
| goto out_err; |
| err = auxtrace__flush_events(session, tool); |
| if (err) |
| goto out_err; |
| err = perf_session__flush_thread_stacks(session); |
| out_err: |
| ui_progress__finish(); |
| perf_session__warn_about_errors(session); |
| ordered_events__free(&session->ordered_events); |
| auxtrace__free_events(session); |
| session->one_mmap = false; |
| return err; |
| } |
| |
| int perf_session__process_events(struct perf_session *session) |
| { |
| u64 size = perf_data_file__size(session->file); |
| int err; |
| |
| if (perf_session__register_idle_thread(session) < 0) |
| return -ENOMEM; |
| |
| if (!perf_data_file__is_pipe(session->file)) |
| err = __perf_session__process_events(session, |
| session->header.data_offset, |
| session->header.data_size, size); |
| else |
| err = __perf_session__process_pipe_events(session); |
| |
| return err; |
| } |
| |
| bool perf_session__has_traces(struct perf_session *session, const char *msg) |
| { |
| struct perf_evsel *evsel; |
| |
| evlist__for_each(session->evlist, evsel) { |
| if (evsel->attr.type == PERF_TYPE_TRACEPOINT) |
| return true; |
| } |
| |
| pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
| return false; |
| } |
| |
| int maps__set_kallsyms_ref_reloc_sym(struct map **maps, |
| const char *symbol_name, u64 addr) |
| { |
| char *bracket; |
| enum map_type i; |
| struct ref_reloc_sym *ref; |
| |
| ref = zalloc(sizeof(struct ref_reloc_sym)); |
| if (ref == NULL) |
| return -ENOMEM; |
| |
| ref->name = strdup(symbol_name); |
| if (ref->name == NULL) { |
| free(ref); |
| return -ENOMEM; |
| } |
| |
| bracket = strchr(ref->name, ']'); |
| if (bracket) |
| *bracket = '\0'; |
| |
| ref->addr = addr; |
| |
| for (i = 0; i < MAP__NR_TYPES; ++i) { |
| struct kmap *kmap = map__kmap(maps[i]); |
| |
| if (!kmap) |
| continue; |
| kmap->ref_reloc_sym = ref; |
| } |
| |
| return 0; |
| } |
| |
| size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) |
| { |
| return machines__fprintf_dsos(&session->machines, fp); |
| } |
| |
| size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, |
| bool (skip)(struct dso *dso, int parm), int parm) |
| { |
| return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); |
| } |
| |
| size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) |
| { |
| size_t ret; |
| const char *msg = ""; |
| |
| if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) |
| msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; |
| |
| ret = fprintf(fp, "\nAggregated stats:%s\n", msg); |
| |
| ret += events_stats__fprintf(&session->evlist->stats, fp); |
| return ret; |
| } |
| |
| size_t perf_session__fprintf(struct perf_session *session, FILE *fp) |
| { |
| /* |
| * FIXME: Here we have to actually print all the machines in this |
| * session, not just the host... |
| */ |
| return machine__fprintf(&session->machines.host, fp); |
| } |
| |
| struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, |
| unsigned int type) |
| { |
| struct perf_evsel *pos; |
| |
| evlist__for_each(session->evlist, pos) { |
| if (pos->attr.type == type) |
| return pos; |
| } |
| return NULL; |
| } |
| |
| void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, |
| struct addr_location *al, |
| unsigned int print_opts, unsigned int stack_depth) |
| { |
| struct callchain_cursor_node *node; |
| int print_ip = print_opts & PRINT_IP_OPT_IP; |
| int print_sym = print_opts & PRINT_IP_OPT_SYM; |
| int print_dso = print_opts & PRINT_IP_OPT_DSO; |
| int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; |
| int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; |
| int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE; |
| char s = print_oneline ? ' ' : '\t'; |
| |
| if (symbol_conf.use_callchain && sample->callchain) { |
| struct addr_location node_al; |
| |
| if (thread__resolve_callchain(al->thread, evsel, |
| sample, NULL, NULL, |
| stack_depth) != 0) { |
| if (verbose) |
| error("Failed to resolve callchain. Skipping\n"); |
| return; |
| } |
| callchain_cursor_commit(&callchain_cursor); |
| |
| if (print_symoffset) |
| node_al = *al; |
| |
| while (stack_depth) { |
| u64 addr = 0; |
| |
| node = callchain_cursor_current(&callchain_cursor); |
| if (!node) |
| break; |
| |
| if (node->sym && node->sym->ignore) |
| goto next; |
| |
| if (print_ip) |
| printf("%c%16" PRIx64, s, node->ip); |
| |
| if (node->map) |
| addr = node->map->map_ip(node->map, node->ip); |
| |
| if (print_sym) { |
| printf(" "); |
| if (print_symoffset) { |
| node_al.addr = addr; |
| node_al.map = node->map; |
| symbol__fprintf_symname_offs(node->sym, &node_al, stdout); |
| } else |
| symbol__fprintf_symname(node->sym, stdout); |
| } |
| |
| if (print_dso) { |
| printf(" ("); |
| map__fprintf_dsoname(node->map, stdout); |
| printf(")"); |
| } |
| |
| if (print_srcline) |
| map__fprintf_srcline(node->map, addr, "\n ", |
| stdout); |
| |
| if (!print_oneline) |
| printf("\n"); |
| |
| stack_depth--; |
| next: |
| callchain_cursor_advance(&callchain_cursor); |
| } |
| |
| } else { |
| if (al->sym && al->sym->ignore) |
| return; |
| |
| if (print_ip) |
| printf("%16" PRIx64, sample->ip); |
| |
| if (print_sym) { |
| printf(" "); |
| if (print_symoffset) |
| symbol__fprintf_symname_offs(al->sym, al, |
| stdout); |
| else |
| symbol__fprintf_symname(al->sym, stdout); |
| } |
| |
| if (print_dso) { |
| printf(" ("); |
| map__fprintf_dsoname(al->map, stdout); |
| printf(")"); |
| } |
| |
| if (print_srcline) |
| map__fprintf_srcline(al->map, al->addr, "\n ", stdout); |
| } |
| } |
| |
| int perf_session__cpu_bitmap(struct perf_session *session, |
| const char *cpu_list, unsigned long *cpu_bitmap) |
| { |
| int i, err = -1; |
| struct cpu_map *map; |
| |
| for (i = 0; i < PERF_TYPE_MAX; ++i) { |
| struct perf_evsel *evsel; |
| |
| evsel = perf_session__find_first_evtype(session, i); |
| if (!evsel) |
| continue; |
| |
| if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { |
| pr_err("File does not contain CPU events. " |
| "Remove -c option to proceed.\n"); |
| return -1; |
| } |
| } |
| |
| map = cpu_map__new(cpu_list); |
| if (map == NULL) { |
| pr_err("Invalid cpu_list\n"); |
| return -1; |
| } |
| |
| for (i = 0; i < map->nr; i++) { |
| int cpu = map->map[i]; |
| |
| if (cpu >= MAX_NR_CPUS) { |
| pr_err("Requested CPU %d too large. " |
| "Consider raising MAX_NR_CPUS\n", cpu); |
| goto out_delete_map; |
| } |
| |
| set_bit(cpu, cpu_bitmap); |
| } |
| |
| err = 0; |
| |
| out_delete_map: |
| cpu_map__put(map); |
| return err; |
| } |
| |
| void perf_session__fprintf_info(struct perf_session *session, FILE *fp, |
| bool full) |
| { |
| struct stat st; |
| int fd, ret; |
| |
| if (session == NULL || fp == NULL) |
| return; |
| |
| fd = perf_data_file__fd(session->file); |
| |
| ret = fstat(fd, &st); |
| if (ret == -1) |
| return; |
| |
| fprintf(fp, "# ========\n"); |
| fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); |
| perf_header__fprintf_info(session, fp, full); |
| fprintf(fp, "# ========\n#\n"); |
| } |
| |
| |
| int __perf_session__set_tracepoints_handlers(struct perf_session *session, |
| const struct perf_evsel_str_handler *assocs, |
| size_t nr_assocs) |
| { |
| struct perf_evsel *evsel; |
| size_t i; |
| int err; |
| |
| for (i = 0; i < nr_assocs; i++) { |
| /* |
| * Adding a handler for an event not in the session, |
| * just ignore it. |
| */ |
| evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); |
| if (evsel == NULL) |
| continue; |
| |
| err = -EEXIST; |
| if (evsel->handler != NULL) |
| goto out; |
| evsel->handler = assocs[i].handler; |
| } |
| |
| err = 0; |
| out: |
| return err; |
| } |
| |
| int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, |
| union perf_event *event, |
| struct perf_session *session) |
| { |
| struct perf_evlist *evlist = session->evlist; |
| struct id_index_event *ie = &event->id_index; |
| size_t i, nr, max_nr; |
| |
| max_nr = (ie->header.size - sizeof(struct id_index_event)) / |
| sizeof(struct id_index_entry); |
| nr = ie->nr; |
| if (nr > max_nr) |
| return -EINVAL; |
| |
| if (dump_trace) |
| fprintf(stdout, " nr: %zu\n", nr); |
| |
| for (i = 0; i < nr; i++) { |
| struct id_index_entry *e = &ie->entries[i]; |
| struct perf_sample_id *sid; |
| |
| if (dump_trace) { |
| fprintf(stdout, " ... id: %"PRIu64, e->id); |
| fprintf(stdout, " idx: %"PRIu64, e->idx); |
| fprintf(stdout, " cpu: %"PRId64, e->cpu); |
| fprintf(stdout, " tid: %"PRId64"\n", e->tid); |
| } |
| |
| sid = perf_evlist__id2sid(evlist, e->id); |
| if (!sid) |
| return -ENOENT; |
| sid->idx = e->idx; |
| sid->cpu = e->cpu; |
| sid->tid = e->tid; |
| } |
| return 0; |
| } |
| |
| int perf_event__synthesize_id_index(struct perf_tool *tool, |
| perf_event__handler_t process, |
| struct perf_evlist *evlist, |
| struct machine *machine) |
| { |
| union perf_event *ev; |
| struct perf_evsel *evsel; |
| size_t nr = 0, i = 0, sz, max_nr, n; |
| int err; |
| |
| pr_debug2("Synthesizing id index\n"); |
| |
| max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / |
| sizeof(struct id_index_entry); |
| |
| evlist__for_each(evlist, evsel) |
| nr += evsel->ids; |
| |
| n = nr > max_nr ? max_nr : nr; |
| sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); |
| ev = zalloc(sz); |
| if (!ev) |
| return -ENOMEM; |
| |
| ev->id_index.header.type = PERF_RECORD_ID_INDEX; |
| ev->id_index.header.size = sz; |
| ev->id_index.nr = n; |
| |
| evlist__for_each(evlist, evsel) { |
| u32 j; |
| |
| for (j = 0; j < evsel->ids; j++) { |
| struct id_index_entry *e; |
| struct perf_sample_id *sid; |
| |
| if (i >= n) { |
| err = process(tool, ev, NULL, machine); |
| if (err) |
| goto out_err; |
| nr -= n; |
| i = 0; |
| } |
| |
| e = &ev->id_index.entries[i++]; |
| |
| e->id = evsel->id[j]; |
| |
| sid = perf_evlist__id2sid(evlist, e->id); |
| if (!sid) { |
| free(ev); |
| return -ENOENT; |
| } |
| |
| e->idx = sid->idx; |
| e->cpu = sid->cpu; |
| e->tid = sid->tid; |
| } |
| } |
| |
| sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); |
| ev->id_index.header.size = sz; |
| ev->id_index.nr = nr; |
| |
| err = process(tool, ev, NULL, machine); |
| out_err: |
| free(ev); |
| |
| return err; |
| } |