app/eventdev: add options for mbuf and packet sizes

Add options to set mbuf size and max packet size which allow the user to
enable jumbo frames and Rx/Tx scatter gather.
Arrange `struct evt_options` based on ascending order of data type to
make it more readable.

Packet mbuf size can be modified by using `--mbuf_sz=N`.
Max packet size can be modified by using `--max_pkt_sz=N`.
These options are only applicable `pipeline_atq` and `pipeline_queue`
tests.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>

app/test-eventdev/evt_common.h

@@ -47,28 +47,30 @@ struct evt_options {
 	char test_name[EVT_TEST_NAME_MAX_LEN];
 	bool plcores[RTE_MAX_LCORE];
 	bool wlcores[RTE_MAX_LCORE];
-	uint8_t sched_type_list[EVT_MAX_STAGES];
-	uint32_t nb_flows;
-	int socket_id;
 	int pool_sz;
+	int socket_id;
 	int nb_stages;
 	int verbose_level;
-	uint64_t nb_pkts;
+	uint8_t dev_id;
+	uint8_t timdev_cnt;
 	uint8_t nb_timer_adptrs;
+	uint8_t timdev_use_burst;
+	uint8_t sched_type_list[EVT_MAX_STAGES];
+	uint16_t mbuf_sz;
+	uint16_t wkr_deq_dep;
+	uint32_t nb_flows;
+	uint32_t tx_first;
+	uint32_t max_pkt_sz;
+	uint32_t deq_tmo_nsec;
+	uint32_t q_priority:1;
+	uint32_t fwd_latency:1;
+	uint64_t nb_pkts;
 	uint64_t nb_timers;
+	uint64_t expiry_nsec;
+	uint64_t max_tmo_nsec;
 	uint64_t timer_tick_nsec;
 	uint64_t optm_timer_tick_nsec;
-	uint64_t max_tmo_nsec;
-	uint64_t expiry_nsec;
-	uint16_t wkr_deq_dep;
-	uint8_t dev_id;
-	uint32_t tx_first;
-	uint32_t fwd_latency:1;
-	uint32_t q_priority:1;
-	uint32_t deq_tmo_nsec;
 	enum evt_prod_type prod_type;
-	uint8_t timdev_use_burst;
-	uint8_t timdev_cnt;
 };
 
 static inline bool

app/test-eventdev/evt_options.c

@@ -233,6 +233,26 @@ evt_parse_work_lcores(struct evt_options *opt, const char *corelist)
 	return ret;
 }
 
+static int
+evt_parse_mbuf_sz(struct evt_options *opt, const char *arg)
+{
+	int ret;
+
+	ret = parser_read_uint16(&(opt->mbuf_sz), arg);
+
+	return ret;
+}
+
+static int
+evt_parse_max_pkt_sz(struct evt_options *opt, const char *arg)
+{
+	int ret;
+
+	ret = parser_read_uint32(&(opt->max_pkt_sz), arg);
+
+	return ret;
+}
+
 static void
 usage(char *program)
 {
@@ -262,7 +282,9 @@ usage(char *program)
 		"\t--nb_timer_adptrs  : number of timer adapters to use.\n"
 		"\t--timer_tick_nsec  : timer tick interval in ns.\n"
 		"\t--max_tmo_nsec     : max timeout interval in ns.\n"
-		"\t--expiry_nsec        : event timer expiry ns.\n"
+		"\t--expiry_nsec      : event timer expiry ns.\n"
+		"\t--mbuf_sz          : packet mbuf size.\n"
+		"\t--max_pkt_sz       : max packet size.\n"
 		);
 	printf("available tests:\n");
 	evt_test_dump_names();
@@ -332,6 +354,8 @@ static struct option lgopts[] = {
 	{ EVT_TIMER_TICK_NSEC,     1, 0, 0 },
 	{ EVT_MAX_TMO_NSEC,        1, 0, 0 },
 	{ EVT_EXPIRY_NSEC,         1, 0, 0 },
+	{ EVT_MBUF_SZ,             1, 0, 0 },
+	{ EVT_MAX_PKT_SZ,          1, 0, 0 },
 	{ EVT_HELP,                0, 0, 0 },
 	{ NULL,                    0, 0, 0 }
 };
@@ -364,6 +388,8 @@ evt_opts_parse_long(int opt_idx, struct evt_options *opt)
 		{ EVT_TIMER_TICK_NSEC, evt_parse_timer_tick_nsec},
 		{ EVT_MAX_TMO_NSEC, evt_parse_max_tmo_nsec},
 		{ EVT_EXPIRY_NSEC, evt_parse_expiry_nsec},
+		{ EVT_MBUF_SZ, evt_parse_mbuf_sz},
+		{ EVT_MAX_PKT_SZ, evt_parse_max_pkt_sz},
 	};
 
 	for (i = 0; i < RTE_DIM(parsermap); i++) {

app/test-eventdev/evt_options.h

@@ -40,6 +40,8 @@
 #define EVT_TIMER_TICK_NSEC      ("timer_tick_nsec")
 #define EVT_MAX_TMO_NSEC         ("max_tmo_nsec")
 #define EVT_EXPIRY_NSEC          ("expiry_nsec")
+#define EVT_MBUF_SZ              ("mbuf_sz")
+#define EVT_MAX_PKT_SZ           ("max_pkt_sz")
 #define EVT_HELP                 ("help")
 
 void evt_options_default(struct evt_options *opt);

app/test-eventdev/test_pipeline_common.c

@@ -166,7 +166,6 @@ pipeline_ethdev_setup(struct evt_test *test, struct evt_options *opt)
 	struct rte_eth_conf port_conf = {
 		.rxmode = {
 			.mq_mode = ETH_MQ_RX_RSS,
-			.max_rx_pkt_len = RTE_ETHER_MAX_LEN,
 		},
 		.rx_adv_conf = {
 			.rss_conf = {
@@ -176,12 +175,21 @@ pipeline_ethdev_setup(struct evt_test *test, struct evt_options *opt)
 		},
 	};
 
-	RTE_SET_USED(opt);
 	if (!rte_eth_dev_count_avail()) {
 		evt_err("No ethernet ports found.");
 		return -ENODEV;
 	}
 
+	if (opt->max_pkt_sz < RTE_ETHER_MIN_LEN) {
+		evt_err("max_pkt_sz can not be less than %d",
+			RTE_ETHER_MIN_LEN);
+		return -EINVAL;
+	}
+
+	port_conf.rxmode.max_rx_pkt_len = opt->max_pkt_sz;
+	if (opt->max_pkt_sz > RTE_ETHER_MAX_LEN)
+		port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
+
 	t->internal_port = 1;
 	RTE_ETH_FOREACH_DEV(i) {
 		struct rte_eth_dev_info dev_info;
@@ -416,12 +424,36 @@ int
 pipeline_mempool_setup(struct evt_test *test, struct evt_options *opt)
 {
 	struct test_pipeline *t = evt_test_priv(test);
+	int i;
+
+	if (!opt->mbuf_sz)
+		opt->mbuf_sz = RTE_MBUF_DEFAULT_BUF_SIZE;
+
+	if (!opt->max_pkt_sz)
+		opt->max_pkt_sz = RTE_ETHER_MAX_LEN;
+
+	RTE_ETH_FOREACH_DEV(i) {
+		struct rte_eth_dev_info dev_info;
+		uint16_t data_size = 0;
+
+		memset(&dev_info, 0, sizeof(dev_info));
+		rte_eth_dev_info_get(i, &dev_info);
+		if (dev_info.rx_desc_lim.nb_mtu_seg_max != UINT16_MAX &&
+				dev_info.rx_desc_lim.nb_mtu_seg_max != 0) {
+			data_size = opt->max_pkt_sz /
+				dev_info.rx_desc_lim.nb_mtu_seg_max;
+			data_size += RTE_PKTMBUF_HEADROOM;
+
+			if (data_size  > opt->mbuf_sz)
+				opt->mbuf_sz = data_size;
+		}
+	}
 
 	t->pool = rte_pktmbuf_pool_create(test->name, /* mempool name */
 			opt->pool_sz, /* number of elements*/
 			512, /* cache size*/
 			0,
-			RTE_MBUF_DEFAULT_BUF_SIZE,
+			opt->mbuf_sz,
 			opt->socket_id); /* flags */
 
 	if (t->pool == NULL) {

doc/guides/tools/testeventdev.rst

@@ -161,6 +161,16 @@ The following are the application command-line options:
        timeout is out of the supported range of event device it will be
        adjusted to the highest/lowest supported dequeue timeout supported.
 
+* ``--mbuf_sz``
+
+       Set packet mbuf size. Can be used to configure Jumbo Frames. Only
+       applicable for `pipeline_atq` and `pipeline_queue` tests.
+
+* ``--max_pkt_sz``
+
+       Set max packet mbuf size. Can be used configure Rx/Tx scatter gather.
+       Only applicable for `pipeline_atq` and `pipeline_queue` tests.
+
 
 Eventdev Tests
 --------------