Wei Hu (Xavier) 9eb974221f app/testpmd: fix statistics after reset ... Currently, when running start/clear stats&xstats/stop command many times based on testpmd application, there are incorrect forward Rx/Tx-packets stats as below: ---------------------- Forward statistics for port 0 -------------- RX-packets: 18446744073709544808 RX-dropped: 0 <snip> TX-packets: 18446744073709536616 TX-dropped: 0 <snip> -------------------------------------------------------------------- The root cause as below: 1. The struct rte_port of testpmd.h has a member variable "struct rte_eth_stats stats" to store the last port statistics. 2. When running start command, it execute cmd_start_parsed -> start_packet_forwarding -> fwd_stats_reset, which call rte_eth_stats_get API function to save current port statistics. 3. When running stop command, it execute fwd_stats_display, which call rte_eth_stats_get to get current port statistics, and then minus last port statistics. 4. If we run clear stats or xstats after start command, then run stop, it may display above incorrect stats because the current Rx/Tx-packets is lower than the last saved RX/TX-packets(uint64_t overflow). This patch fixes it by clearing last port statistics when executing "clear stats/xstats" command. Fixes: af75078fec ("first public release") Cc: stable@dpdk.org Signed-off-by: Chengwen Feng <fengchengwen@huawei.com> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>		2020-05-11 22:27:39 +02:00
..
api	node: add generic IPv4 lookup	2020-05-05 23:40:22 +02:00
guides	app/testpmd: fix statistics after reset	2020-05-11 22:27:39 +02:00
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