[dpdk-dev] [PATCH v2] app/testpmd: fix burst stat reporting

[Daniel Shelepov <dashel@microsoft.com>]

When RTE_TEST_PMD_RECORD_BURST_STATS is enabled, testpmd collects
burst statistics and includes them in the port stats report.  The
summary should include top 2 most frequent burst sizes, but there is a
bug in finding the top-2.  During the scan of burst size counts, the
top-2 can change only if top-1 also changes.

Added logic to update the top-2 if current burst size is larger than
existing top-2, but smaller than existing top-1.

Fixes: af75078fece3 ("first public release")

Signed-off-by: Daniel Shelepov <dashel@microsoft.com>
---
 app/test-pmd/testpmd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index db23f23e5..cc38e51fc 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -927,6 +927,9 @@ pkt_burst_stats_display(const char *rx_tx, struct pkt_burst_stats *pbs)
 			pktnb_stats[1] = pktnb_stats[0];
 			burst_stats[0] = nb_burst;
 			pktnb_stats[0] = nb_pkt;
+		} else if (nb_burst > burst_stats[1]) {
+			burst_stats[1] = nb_burst;
+			pktnb_stats[1] = nb_pkt;
 		}
 	}
 	if (total_burst == 0)
-- 
2.15.1.gvfs.2.39.g03d366a