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From: Phil Yang <phil.yang@arm.com>
To: dev@dpdk.org
Cc: ferruh.yigit@intel.com, maxime.coquelin@redhat.com,
	Honnappa.Nagarahalli@arm.com, ruifeng.wang@arm.com, nd@arm.com,
	stable@dpdk.org, david.marchand@redhat.com
Subject: [dpdk-stable] [PATCH v2] app/testpmd: fix CPU cycles per pkt stats on transmit modes
Date: Fri, 19 Jun 2020 12:08:01 +0800
Message-ID: <1592539681-3855-1-git-send-email-phil.yang@arm.com> (raw)
In-Reply-To: <1592491803-21173-1-git-send-email-phil.yang@arm.com>

In txonly and flowgen forwarding mode, calculating CPU per packets with
total received packets is not accurate. Use total transmitted packets
for these cases.

The error output under txonly mode:
testpmd> show fwd stats all

---------------------- Forward statistics for port 0  -------------------
RX-packets: 0              RX-dropped: 0             RX-total: 0
TX-packets: 3582891927     TX-dropped: 401965824     TX-total: 3984857751
TX-bursts : 86381636 [0% of 0 pkts + 85% of 64 pkts + 15% of 32 pkts]
-------------------------------------------------------------------------

---------------------- Forward statistics for port 1  -------------------
RX-packets: 1              RX-dropped: 394351696     RX-total: 394351697
TX-packets: 3582890632     TX-dropped: 401965568     TX-total: 3984856200
TX-bursts : 86381679 [0% of 0 pkts + 85% of 64 pkts + 15% of 32 pkts]
-------------------------------------------------------------------------

+++++++++++++++ Accumulated forward statistics for all ports+++++++++++++
RX-packets: 1              RX-dropped: 394351696     RX-total: 394351697
TX-packets: 7165782559     TX-dropped: 803931392     TX-total: 7969713951
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

CPU cycles/packet=54984156291.00 \
(total cycles=54984156291 / total RX packets=1) at 200 MHz Clock

Signed-off-by: Phil Yang <phil.yang@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Fixes: 53324971a14e ("app/testpmd: display/clear forwarding stats on demand")
Cc: stable@dpdk.org
Cc: david.marchand@redhat.com
---
v2:
Consolidate the output into a single printf. (Honnappa Nagarahalli)

 app/test-pmd/testpmd.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 4989d22..826d7dd 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1961,13 +1961,22 @@ fwd_stats_display(void)
 	       acc_stats_border, acc_stats_border);
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 #define CYC_PER_MHZ 1E6
-	if (total_recv > 0)
+	if (total_recv > 0 || total_xmit > 0) {
+		uint8_t ingress;
+		if (strcmp(cur_fwd_eng->fwd_mode_name, "txonly") == 0 ||
+		    strcmp(cur_fwd_eng->fwd_mode_name, "flowgen") == 0)
+			ingress = 0;
+		else
+			ingress = 1;
+
 		printf("\n  CPU cycles/packet=%.2F (total cycles="
-		       "%"PRIu64" / total RX packets=%"PRIu64") at %"PRIu64
-		       " MHz Clock\n",
-		       (double) fwd_cycles / total_recv,
-		       fwd_cycles, total_recv,
-		       (uint64_t)(rte_get_tsc_hz() / CYC_PER_MHZ));
+			"%"PRIu64" / total %s packets=%"PRIu64") at %"
+			PRIu64" MHz Clock\n", ((double) fwd_cycles /
+				(ingress ? total_recv : total_xmit)),
+			fwd_cycles, cur_fwd_eng->fwd_mode_name,
+			(ingress ? total_recv : total_xmit),
+			(uint64_t)(rte_get_tsc_hz() / CYC_PER_MHZ));
+	}
 #endif
 }
 
-- 
2.7.4


  parent reply	other threads:[~2020-06-19  4:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-18 14:50 [dpdk-stable] [PATCH] " Phil Yang
2020-06-18 19:28 ` Honnappa Nagarahalli
2020-06-19  3:54   ` Phil Yang
2020-06-19  4:08 ` Phil Yang [this message]
2020-06-22  3:39   ` [dpdk-stable] [PATCH v2] " Honnappa Nagarahalli
2020-06-22  8:48     ` Phil Yang
2020-06-22  9:04   ` [dpdk-stable] [PATCH v3] " Phil Yang
2020-07-10 17:14     ` Ferruh Yigit

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