diff options
| -rw-r--r-- | tools/perf/builtin-kwork.c | 98 |
1 files changed, 96 insertions, 2 deletions
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c index 46c0052f07b2..bdfeea3d07a3 100644 --- a/tools/perf/builtin-kwork.c +++ b/tools/perf/builtin-kwork.c @@ -550,17 +550,111 @@ static struct kwork_class kwork_irq = { .work_name = irq_work_name, }; +static struct kwork_class kwork_softirq; +static int process_softirq_entry_event(struct perf_tool *tool, + struct evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool); + + if (kwork->tp_handler->entry_event) + return kwork->tp_handler->entry_event(kwork, &kwork_softirq, + evsel, sample, machine); + + return 0; +} + +static int process_softirq_exit_event(struct perf_tool *tool, + struct evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool); + + if (kwork->tp_handler->exit_event) + return kwork->tp_handler->exit_event(kwork, &kwork_softirq, + evsel, sample, machine); + + return 0; +} + const struct evsel_str_handler softirq_tp_handlers[] = { { "irq:softirq_raise", NULL, }, - { "irq:softirq_entry", NULL, }, - { "irq:softirq_exit", NULL, }, + { "irq:softirq_entry", process_softirq_entry_event, }, + { "irq:softirq_exit", process_softirq_exit_event, }, }; +static int softirq_class_init(struct kwork_class *class, + struct perf_session *session) +{ + if (perf_session__set_tracepoints_handlers(session, + softirq_tp_handlers)) { + pr_err("Failed to set softirq tracepoints handlers\n"); + return -1; + } + + class->work_root = RB_ROOT_CACHED; + return 0; +} + +static char *evsel__softirq_name(struct evsel *evsel, u64 num) +{ + char *name = NULL; + bool found = false; + struct tep_print_flag_sym *sym = NULL; + struct tep_print_arg *args = evsel->tp_format->print_fmt.args; + + if ((args == NULL) || (args->next == NULL)) + return NULL; + + /* skip softirq field: "REC->vec" */ + for (sym = args->next->symbol.symbols; sym != NULL; sym = sym->next) { + if ((eval_flag(sym->value) == (unsigned long long)num) && + (strlen(sym->str) != 0)) { + found = true; + break; + } + } + + if (!found) + return NULL; + + name = strdup(sym->str); + if (name == NULL) { + pr_err("Failed to copy symbol name\n"); + return NULL; + } + return name; +} + +static void softirq_work_init(struct kwork_class *class, + struct kwork_work *work, + struct evsel *evsel, + struct perf_sample *sample, + struct machine *machine __maybe_unused) +{ + u64 num = evsel__intval(evsel, sample, "vec"); + + work->id = num; + work->class = class; + work->cpu = sample->cpu; + work->name = evsel__softirq_name(evsel, num); +} + +static void softirq_work_name(struct kwork_work *work, char *buf, int len) +{ + snprintf(buf, len, "(s)%s:%" PRIu64 "", work->name, work->id); +} + static struct kwork_class kwork_softirq = { .name = "softirq", .type = KWORK_CLASS_SOFTIRQ, .nr_tracepoints = 3, .tp_handlers = softirq_tp_handlers, + .class_init = softirq_class_init, + .work_init = softirq_work_init, + .work_name = softirq_work_name, }; const struct evsel_str_handler workqueue_tp_handlers[] = { |