C++ (Cpp) tracecmd_peek_data Examples

Example #1

File: trace-mem.c Project: josefbacik/trace-cmd

static void do_trace_mem(struct tracecmd_input *handle)
{
	struct pevent *pevent = tracecmd_get_pevent(handle);
	struct event_format *event;
	struct pevent_record *record;
	int missed_events = 0;
	int cpus;
	int cpu;
	int ret;

	ret = tracecmd_init_data(handle);
	if (ret < 0)
		die("failed to init data");

	if (ret > 0)
		die("trace-cmd mem does not work with latency traces\n");

	cpus = tracecmd_cpus(handle);

	/* Need to get any event */
	for (cpu = 0; cpu < cpus; cpu++) {
		record = tracecmd_peek_data(handle, cpu);
		if (record)
			break;
	}
	if (!record)
		die("No records found in file");

	ret = pevent_data_type(pevent, record);
	event = pevent_data_event_from_type(pevent, ret);

	common_type_field = pevent_find_common_field(event, "common_type");
	if (!common_type_field)
		die("Can't find a 'type' field?");

	update_kmalloc(pevent);
	update_kmalloc_node(pevent);
	update_kfree(pevent);
	update_kmem_cache_alloc(pevent);
	update_kmem_cache_alloc_node(pevent);
	update_kmem_cache_free(pevent);

	while ((record = tracecmd_read_next_data(handle, &cpu))) {

		/* record missed event */
		if (!missed_events && record->missed_events)
			missed_events = 1;

		process_record(pevent, record);
		free_record(record);
	}

	sort_list();
	print_list();
}

Example #2

File: trace-hist.c Project: feedcafe/trace-cmd

static void do_trace_hist(struct tracecmd_input *handle)
{
	struct pevent *pevent = tracecmd_get_pevent(handle);
	struct event_format *event;
	struct pevent_record *record;
	int cpus;
	int cpu;
	int ret;

	ret = tracecmd_init_data(handle);
	if (ret < 0)
		die("failed to init data");

	if (ret > 0)
		die("trace-cmd hist does not work with latency traces\n");

	cpus = tracecmd_cpus(handle);

	/* Need to get any event */
	for (cpu = 0; cpu < cpus; cpu++) {
		record = tracecmd_peek_data(handle, cpu);
		if (record)
			break;
	}
	if (!record)
		die("No records found in file");

	ret = pevent_data_type(pevent, record);
	event = pevent_data_event_from_type(pevent, ret);

	long_size = tracecmd_long_size(handle);

	common_type_field = pevent_find_common_field(event, "common_type");
	if (!common_type_field)
		die("Can't find a 'type' field?");

	common_pid_field = pevent_find_common_field(event, "common_pid");
	if (!common_pid_field)
		die("Can't find a 'pid' field?");

	update_sched_wakeup(pevent);
	update_sched_wakeup_new(pevent);
	update_sched_switch(pevent);
	update_function(pevent);
	update_function_graph_entry(pevent);
	update_function_graph_exit(pevent);
	update_kernel_stack(pevent);

	for (cpu = 0; cpu < cpus; cpu++) {
		for (;;) {
			struct pevent_record *record;

			record = tracecmd_read_data(handle, cpu);
			if (!record)
				break;

			/* If we missed events, just flush out the current stack */
			if (record->missed_events)
				flush_stack();

			process_record(pevent, record);
			free_record(record);
		}
	}

	if (current_pid >= 0)
		save_call_chain(current_pid, ips, ips_idx, 0);
	if (pending_pid >= 0)
		save_call_chain(pending_pid, pending_ips, pending_ips_idx, 1);

	save_stored_stacks();

	sort_chains();
	print_chains(pevent);
}