selftests: txtimestamp: print statistics for timestamp events. (277bc78f) · Commits · 戴 / test

tools/testing/selftests/networking/timestamping/txtimestamp.c

+58 −0

Original line number	Diff line number	Diff line
		@@ -84,6 +84,17 @@ static struct timespec ts_usr;
		static int saved_tskey = -1;
		static int saved_tskey_type = -1;

		struct timing_event {
		int64_t min;
		int64_t max;
		int64_t total;
		int count;
		};

		static struct timing_event usr_enq;
		static struct timing_event usr_snd;
		static struct timing_event usr_ack;

		static bool test_failed;

		static int64_t timespec_to_ns64(struct timespec *ts)
		@@ -96,6 +107,27 @@ static int64_t timespec_to_us64(struct timespec *ts)
		return ts->tv_sec * USEC_PER_SEC + ts->tv_nsec / NSEC_PER_USEC;
		}

		static void init_timing_event(struct timing_event *te)
		{
		te->min = INT64_MAX;
		te->max = 0;
		te->total = 0;
		te->count = 0;
		}

		static void add_timing_event(struct timing_event *te,
		struct timespec t_start, struct timespec t_end)
		{
		int64_t ts_delta = timespec_to_ns64(t_end) - timespec_to_ns64(t_start);

		te->count++;
		if (ts_delta < te->min)
		te->min = ts_delta;
		if (ts_delta > te->max)
		te->max = ts_delta;
		te->total += ts_delta;
		}

		static void validate_key(int tskey, int tstype)
		{
		int stepsize;
		@@ -187,14 +219,17 @@ static void print_timestamp(struct scm_timestamping *tss, int tstype,
		case SCM_TSTAMP_SCHED:
		tsname = " ENQ";
		validate_timestamp(&tss->ts[0], 0);
		add_timing_event(&usr_enq, &ts_usr, &tss->ts[0]);
		break;
		case SCM_TSTAMP_SND:
		tsname = " SND";
		validate_timestamp(&tss->ts[0], cfg_delay_snd);
		add_timing_event(&usr_snd, &ts_usr, &tss->ts[0]);
		break;
		case SCM_TSTAMP_ACK:
		tsname = " ACK";
		validate_timestamp(&tss->ts[0], cfg_delay_ack);
		add_timing_event(&usr_ack, &ts_usr, &tss->ts[0]);
		break;
		default:
		error(1, 0, "unknown timestamp type: %u",
		@@ -203,6 +238,21 @@ static void print_timestamp(struct scm_timestamping *tss, int tstype,
		__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
		}

		static void print_timing_event(char name, struct timing_event te)
		{
		if (!te->count)
		return;

		fprintf(stderr, " %s: count=%d", name, te->count);
		fprintf(stderr, ", avg=");
		__print_ts_delta_formatted((int64_t)(te->total / te->count));
		fprintf(stderr, ", min=");
		__print_ts_delta_formatted(te->min);
		fprintf(stderr, ", max=");
		__print_ts_delta_formatted(te->max);
		fprintf(stderr, "\n");
		}

		/* TODO: convert to check_and_print payload once API is stable */
		static void print_payload(char *data, int len)
		{
		@@ -436,6 +486,10 @@ static void do_test(int family, unsigned int report_opt)
		char *buf;
		int fd, i, val = 1, total_len, epfd = 0;

		init_timing_event(&usr_enq);
		init_timing_event(&usr_snd);
		init_timing_event(&usr_ack);

		total_len = cfg_payload_len;
		if (cfg_use_pf_packet \|\| cfg_proto == SOCK_RAW) {
		total_len += sizeof(struct udphdr);
		@@ -595,6 +649,10 @@ static void do_test(int family, unsigned int report_opt)
		while (!recv_errmsg(fd)) {}
		}

		print_timing_event("USR-ENQ", &usr_enq);
		print_timing_event("USR-SND", &usr_snd);
		print_timing_event("USR-ACK", &usr_ack);

		if (close(fd))
		error(1, errno, "close");

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