From 0ad21f6869222fd7fd7c63f02febea082e801fc2 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 30 Apr 2015 17:37:30 +0300 Subject: [PATCH] perf tools: Add support for PERF_RECORD_ITRACE_START Add support for the PERF_RECORD_ITRACE_START event type. This event can be used to determine the pid and tid that are running when Instruction Tracing starts. Generally that information would come from a sched_switch event but, at the start, no sched_switch events may yet have been recorded. Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Cc: David Ahern Cc: Frederic Weisbecker Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1430404667-10593-8-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-inject.c | 1 + tools/perf/util/event.c | 18 ++++++++++++++++++ tools/perf/util/event.h | 11 +++++++++++ tools/perf/util/machine.c | 11 +++++++++++ tools/perf/util/machine.h | 2 ++ tools/perf/util/session.c | 15 +++++++++++++++ tools/perf/util/tool.h | 1 + 7 files changed, 59 insertions(+) diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c index 3e8f730c7dee..d6a47e854b2b 100644 --- a/tools/perf/builtin-inject.c +++ b/tools/perf/builtin-inject.c @@ -559,6 +559,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused) .exit = perf_event__repipe, .lost = perf_event__repipe, .aux = perf_event__repipe, + .itrace_start = perf_event__repipe, .read = perf_event__repipe_sample, .throttle = perf_event__repipe, .unthrottle = perf_event__repipe, diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 724ffde8e7d7..db526091f580 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -24,6 +24,7 @@ static const char *perf_event__names[] = { [PERF_RECORD_READ] = "READ", [PERF_RECORD_SAMPLE] = "SAMPLE", [PERF_RECORD_AUX] = "AUX", + [PERF_RECORD_ITRACE_START] = "ITRACE_START", [PERF_RECORD_HEADER_ATTR] = "ATTR", [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", @@ -704,6 +705,14 @@ int perf_event__process_aux(struct perf_tool *tool __maybe_unused, return machine__process_aux_event(machine, event); } +int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_sample *sample __maybe_unused, + struct machine *machine) +{ + return machine__process_itrace_start_event(machine, event); +} + size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) { return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", @@ -776,6 +785,12 @@ size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : ""); } +size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) +{ + return fprintf(fp, " pid: %u tid: %u\n", + event->itrace_start.pid, event->itrace_start.tid); +} + size_t perf_event__fprintf(union perf_event *event, FILE *fp) { size_t ret = fprintf(fp, "PERF_RECORD_%s", @@ -798,6 +813,9 @@ size_t perf_event__fprintf(union perf_event *event, FILE *fp) case PERF_RECORD_AUX: ret += perf_event__fprintf_aux(event, fp); break; + case PERF_RECORD_ITRACE_START: + ret += perf_event__fprintf_itrace_start(event, fp); + break; default: ret += fprintf(fp, "\n"); } diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index b3c350ed4768..7eecd5e23d77 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -330,6 +330,11 @@ struct aux_event { u64 flags; }; +struct itrace_start_event { + struct perf_event_header header; + u32 pid, tid; +}; + union perf_event { struct perf_event_header header; struct mmap_event mmap; @@ -349,6 +354,7 @@ union perf_event { struct auxtrace_event auxtrace; struct auxtrace_error_event auxtrace_error; struct aux_event aux; + struct itrace_start_event itrace_start; }; void perf_event__print_totals(void); @@ -388,6 +394,10 @@ int perf_event__process_aux(struct perf_tool *tool, union perf_event *event, struct perf_sample *sample, struct machine *machine); +int perf_event__process_itrace_start(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine); int perf_event__process_mmap(struct perf_tool *tool, union perf_event *event, struct perf_sample *sample, @@ -446,6 +456,7 @@ size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp); size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp); size_t perf_event__fprintf_task(union perf_event *event, FILE *fp); size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp); +size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp); size_t perf_event__fprintf(union perf_event *event, FILE *fp); u64 kallsyms__get_function_start(const char *kallsyms_filename, diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index a7ad51100b55..2f471105efb1 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -494,6 +494,14 @@ int machine__process_aux_event(struct machine *machine __maybe_unused, return 0; } +int machine__process_itrace_start_event(struct machine *machine __maybe_unused, + union perf_event *event) +{ + if (dump_trace) + perf_event__fprintf_itrace_start(event, stdout); + return 0; +} + struct map *machine__new_module(struct machine *machine, u64 start, const char *filename) { @@ -1341,6 +1349,9 @@ int machine__process_event(struct machine *machine, union perf_event *event, ret = machine__process_lost_event(machine, event, sample); break; case PERF_RECORD_AUX: ret = machine__process_aux_event(machine, event); break; + case PERF_RECORD_ITRACE_START: + ret = machine__process_itrace_start_event(machine, event); + break; default: ret = -1; break; diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h index fc5432aa66b5..1d992961d5d1 100644 --- a/tools/perf/util/machine.h +++ b/tools/perf/util/machine.h @@ -83,6 +83,8 @@ int machine__process_lost_event(struct machine *machine, union perf_event *event struct perf_sample *sample); int machine__process_aux_event(struct machine *machine, union perf_event *event); +int machine__process_itrace_start_event(struct machine *machine, + union perf_event *event); int machine__process_mmap_event(struct machine *machine, union perf_event *event, struct perf_sample *sample); int machine__process_mmap2_event(struct machine *machine, union perf_event *event, diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 0b4646cd5245..e722107f932a 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -327,6 +327,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool) tool->lost = perf_event__process_lost; 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->read == NULL) tool->read = process_event_sample_stub; if (tool->throttle == NULL) @@ -455,6 +457,16 @@ static void perf_event__aux_swap(union perf_event *event, bool 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__throttle_swap(union perf_event *event, bool sample_id_all) { @@ -593,6 +605,7 @@ static perf_event__swap_op perf_event__swap_ops[] = { [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_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, @@ -1044,6 +1057,8 @@ static int machines__deliver_event(struct machines *machines, return tool->unthrottle(tool, event, sample, machine); case PERF_RECORD_AUX: return tool->aux(tool, event, sample, machine); + case PERF_RECORD_ITRACE_START: + return tool->itrace_start(tool, event, sample, machine); default: ++evlist->stats.nr_unknown_events; return -1; diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h index 8288caf0836e..7f282ad1d2bd 100644 --- a/tools/perf/util/tool.h +++ b/tools/perf/util/tool.h @@ -44,6 +44,7 @@ struct perf_tool { exit, lost, aux, + itrace_start, throttle, unthrottle; event_attr_op attr; -- 2.30.2