-----Original Message----- From: Huisong Li lihuisong@huawei.com Sent: Tuesday, April 20, 2021 17:01 To: dev@dpdk.org Cc: Yigit, Ferruh ferruh.yigit@intel.com; Li, Xiaoyun xiaoyun.li@intel.com; linuxarm@openeuler.org; lihuisong@huawei.com Subject: [PATCH V3 1/7] app/testpmd: fix forward lcores number when DCB test
Currently, 'nb_fwd_lcores' value are both adjusted based on 'nb_fwd_streams' in rss/simple/icmp_echo_fwd_config_setup. But the operation is missing in dcb_fwd_config_setup, which may lead to a bad behavior in which multiple polling threads operate on the same queue. In this case, the device sends and receives packets, causing unexpected results. The procedure is as follows: 1/ run testpmd with "--rxq=8 --txq=8" 2/ port stop all 3/ set nbcore 8 4/ port config 0 dcb vt off 4 pfc on 5/ port config all rxq 16 6/ port config all txq 16 7/ port start all 8/ set fwd mac 9/ start
Same as v2 comment. Please check that.
For the DCB forwarding test, each core is assigned to each traffic class and each core is assigned a multi-stream. Therefore, 'nb_fwd_lcores' value needs to be adjusted based on 'total_tc_num' in all forwarding ports.
Fixes: 900550de04a7 ("app/testpmd: add dcb support") Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings") Cc: stable@dpdk.org
Signed-off-by: Huisong Li lihuisong@huawei.com Signed-off-by: Lijun Ou oulijun@huawei.com
app/test-pmd/config.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index ccb9bd3..03ee40c 100644 --- a/app/test-pmd/config.c +++ b/app/test-pmd/config.c @@ -2961,6 +2961,21 @@ rss_fwd_config_setup(void) } }
+static uint16_t +get_fwd_port_total_tc_num(void) +{
- struct rte_eth_dcb_info dcb_info;
- uint16_t total_tc_num = 0;
- unsigned int i;
- for (i = 0; i < nb_fwd_ports; i++) {
(void)rte_eth_dev_get_dcb_info(fwd_ports_ids[i], &dcb_info);total_tc_num += dcb_info.nb_tcs;- }
- return total_tc_num;
+}
/**
- For the DCB forwarding test, each core is assigned on each traffic class.
@@ -2980,12 +2995,16 @@ dcb_fwd_config_setup(void) lcoreid_t lc_id; uint16_t nb_rx_queue, nb_tx_queue; uint16_t i, j, k, sm_id = 0;
uint16_t total_tc_num; uint8_t tc = 0;
cur_fwd_config.nb_fwd_lcores = (lcoreid_t) nb_fwd_lcores; cur_fwd_config.nb_fwd_ports = nb_fwd_ports; cur_fwd_config.nb_fwd_streams = (streamid_t) (nb_rxq * cur_fwd_config.nb_fwd_ports);
total_tc_num = get_fwd_port_total_tc_num();
if (cur_fwd_config.nb_fwd_lcores > total_tc_num)
cur_fwd_config.nb_fwd_lcores = total_tc_num;/* reinitialize forwarding streams */ init_fwd_streams();
-- 2.7.4
-
Li, Xiaoyun