app/testpmd: make use of per-PMD Tx/Rx parameters

[dpdk.git] / app / test-pmd / cmdline.c

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 92ef7e1..512e3b5 100644 (file)
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -2718,6 +2718,8 @@ cmd_config_burst_parsed(void *parsed_result,
                        __attribute__((unused)) void *data)
 {
        struct cmd_config_burst *res = parsed_result;
+       struct rte_eth_dev_info dev_info;
+       uint16_t rec_nb_pkts;
 
        if (!all_ports_stopped()) {
                printf("Please stop all ports first\n");
@@ -2725,11 +2727,34 @@ cmd_config_burst_parsed(void *parsed_result,
        }
 
        if (!strcmp(res->name, "burst")) {
-               if (res->value < 1 || res->value > MAX_PKT_BURST) {
+               if (res->value == 0) {
+                       /* If user gives a value of zero, query the PMD for
+                        * its recommended Rx burst size. Testpmd uses a single
+                        * size for all ports, so assume all ports are the same
+                        * NIC model and use the values from Port 0.
+                        */
+                       rte_eth_dev_info_get(0, &dev_info);
+                       rec_nb_pkts = dev_info.default_rxportconf.burst_size;
+
+                       if (rec_nb_pkts == 0) {
+                               printf("PMD does not recommend a burst size.\n"
+                                       "User provided value must be between"
+                                       " 1 and %d\n", MAX_PKT_BURST);
+                               return;
+                       } else if (rec_nb_pkts > MAX_PKT_BURST) {
+                               printf("PMD recommended burst size of %d"
+                                       " exceeds maximum value of %d\n",
+                                       rec_nb_pkts, MAX_PKT_BURST);
+                               return;
+                       }
+                       printf("Using PMD-provided burst value of %d\n",
+                               rec_nb_pkts);
+                       nb_pkt_per_burst = rec_nb_pkts;
+               } else if (res->value > MAX_PKT_BURST) {
                        printf("burst must be >= 1 && <= %d\n", MAX_PKT_BURST);
                        return;
-               }
-               nb_pkt_per_burst = res->value;
+               } else
+                       nb_pkt_per_burst = res->value;
        } else {
                printf("Unknown parameter\n");
                return;