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.y...@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
Fixes: 53324971a14e ("app/testpmd: display/clear forwarding stats on demand")
Cc: sta...@dpdk.org
Cc: david.march...@redhat.com
---
app/test-pmd/testpmd.c | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 4989d22..798b8e0 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1961,13 +1961,23 @@ 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)
- 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));
+ if (total_recv > 0 || total_xmit > 0) {
+ if (strcmp(cur_fwd_eng->fwd_mode_name, "txonly") == 0 ||
+ strcmp(cur_fwd_eng->fwd_mode_name, "flowgen") == 0)
+ printf("\n CPU cycles/packet=%.2F (total cycles="
+ "%"PRIu64" / total %s packets=%"PRIu64") at %"
+ PRIu64" MHz Clock\n",
+ (double) fwd_cycles / total_xmit,
+ fwd_cycles, cur_fwd_eng->fwd_mode_name, total_xmit,
+ (uint64_t)(rte_get_tsc_hz() / CYC_PER_MHZ));
+ else
+ printf("\n CPU cycles/packet=%.2F (total cycles="
+ "%"PRIu64" / total %s packets=%"PRIu64") at %"
+ PRIu64" MHz Clock\n",
+ (double) fwd_cycles / total_recv,
+ fwd_cycles, cur_fwd_eng->fwd_mode_name, total_recv,
+ (uint64_t)(rte_get_tsc_hz() / CYC_PER_MHZ));
+ }
#endif
}
--
2.7.4
