[dpdk-dev] [PATCH v2 1/5] app/testpmd: print clock with CPU cycles per pkt

Dharmik Thakkar dharmik.thakkar at arm.com
Sat May 9 00:38:25 CEST 2020


On aarch64 platforms, the cycles are counted using either a
low-resolution generic counter or a high-resolution PMU cycle counter.
Print the clock frequency along with CPU cycles/packet to identify which
cycle counter is being used.

Signed-off-by: Dharmik Thakkar <dharmik.thakkar at arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
Reviewed-by: Phil Yang <phil.yang at arm.com>
---
v2:
 - Use %"PRIu64" instead of %lu
 - Fix checkpatch warning

---
 app/test-pmd/testpmd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 99bacddbfdca..806abb805879 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1953,11 +1953,14 @@ fwd_stats_display(void)
 	       "%s\n",
 	       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=%u (total cycles="
-		       "%"PRIu64" / total RX packets=%"PRIu64")\n",
+		       "%"PRIu64" / total RX packets=%"PRIu64") at %"PRIu64
+		       " MHz Clock\n",
 		       (unsigned int)(fwd_cycles / total_recv),
-		       fwd_cycles, total_recv);
+		       fwd_cycles, total_recv,
+		       (uint64_t)(rte_get_tsc_hz() / CYC_PER_MHZ));
 #endif
 }
 
-- 
2.20.1



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