[PATCH] app/testpmd: add command line argument 'rx-metadata'

[Hanumanth Pothula <hpothula@marvell.com>]

Presently, rx metadata is sent to PMD by default, leading
to a performance drop as processing for the same in rx path
takes extra cycles.

Hence, introducing command line argument, 'rx-metadata' to
control passing rx metadata to PMD. By default it’s disabled.

ci: skip_checkpatch

Signed-off-by: Hanumanth Pothula <hpothula@marvell.com>
Change-Id: If7b6bbc7489d3e9df89c63e000d71ea2f7fe9afd
---
 app/test-pmd/parameters.c | 4 ++++
 app/test-pmd/testpmd.c    | 6 +++++-
 app/test-pmd/testpmd.h    | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index e3c9757f3f..daf1218977 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -213,6 +213,7 @@ usage(char* progname)
 	printf("  --hairpin-mode=0xXX: bitmask set the hairpin port mode.\n"
 	       "    0x10 - explicit Tx rule, 0x02 - hairpin ports paired\n"
 	       "    0x01 - hairpin ports loop, 0x00 - hairpin port self\n");
+	printf(" --rx-metadata: send rx  metadata to driver \n");
 }
 
 #ifdef RTE_LIB_CMDLINE
@@ -710,6 +711,7 @@ launch_args_parse(int argc, char** argv)
 		{ "record-burst-stats",         0, 0, 0 },
 		{ PARAM_NUM_PROCS,              1, 0, 0 },
 		{ PARAM_PROC_ID,                1, 0, 0 },
+		{ "rx-metadata",                0, 0, 0 },
 		{ 0, 0, 0, 0 },
 	};
 
@@ -1510,6 +1512,8 @@ launch_args_parse(int argc, char** argv)
 				num_procs = atoi(optarg);
 			if (!strcmp(lgopts[opt_idx].name, PARAM_PROC_ID))
 				proc_id = atoi(optarg);
+			if (!strcmp(lgopts[opt_idx].name, "rx-metadata"))
+				rx_metadata_negotiate = 1;
 			break;
 		case 'h':
 			usage(argv[0]);
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index addcbcac85..ebbde5dfc9 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -411,6 +411,9 @@ uint8_t clear_ptypes = true;
 /* Hairpin ports configuration mode. */
 uint16_t hairpin_mode;
 
+/* send rx metadata */
+uint8_t rx_metadata_negotiate;
+
 /* Pretty printing of ethdev events */
 static const char * const eth_event_desc[] = {
 	[RTE_ETH_EVENT_UNKNOWN] = "unknown",
@@ -1628,7 +1631,8 @@ init_config_port_offloads(portid_t pid, uint32_t socket_id)
 	int ret;
 	int i;
 
-	eth_rx_metadata_negotiate_mp(pid);
+	if (rx_metadata_negotiate)
+		eth_rx_metadata_negotiate_mp(pid);
 
 	port->dev_conf.txmode = tx_mode;
 	port->dev_conf.rxmode = rx_mode;
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index fb2f5195d3..8a9168c51e 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -621,6 +621,8 @@ extern struct rte_ether_addr peer_eth_addrs[RTE_MAX_ETHPORTS];
 extern uint32_t burst_tx_delay_time; /**< Burst tx delay time(us) for mac-retry. */
 extern uint32_t burst_tx_retry_num;  /**< Burst tx retry number for mac-retry. */
 
+extern uint8_t rx_metadata_negotiate;
+
 #ifdef RTE_LIB_GRO
 #define GRO_DEFAULT_ITEM_NUM_PER_FLOW 32
 #define GRO_DEFAULT_FLOW_NUM (RTE_GRO_MAX_BURST_ITEM_NUM / \
-- 
2.25.1