[PATCH] examples/l2fwd-crypto: fix stats refresh rate

[Raja Zidane <rzidane@nvidia.com>]

TIMER_MILLISECOND is defined as the number of cpu cycles per millisecond,
current definition is correct for cores with frequency of 2GHZ, for cores
with different frequency, it caused different periods between refresh,
(i.e. the definition is about 14ms on ARM cores).
The devarg that stated the period between stats print was not used,
instead, it was always defaulted to 10 seconds (on 2GHZ core).

Use dpdk API to get CPU frequency, to define TIMER_MILLISECOND.
Use the refresh period devarg instead of defaulting to 10s always.

Fixes: 387259bd6c67 ("examples/l2fwd-crypto: add sample application")
Cc: stable@dpdk.org

Signed-off-by: Raja Zidane <rzidane@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---
 examples/l2fwd-crypto/main.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/examples/l2fwd-crypto/main.c b/examples/l2fwd-crypto/main.c
index bbdb263143..b1e2613ccf 100644
--- a/examples/l2fwd-crypto/main.c
+++ b/examples/l2fwd-crypto/main.c
@@ -252,11 +252,9 @@ struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
 struct l2fwd_crypto_statistics crypto_statistics[RTE_CRYPTO_MAX_DEVS];
 
 /* A tsc-based timer responsible for triggering statistics printout */
-#define TIMER_MILLISECOND 2000000ULL /* around 1ms at 2 Ghz */
+#define TIMER_MILLISECOND (rte_get_tsc_hz() / 1000)
 #define MAX_TIMER_PERIOD 86400UL /* 1 day max */
-
-/* default period is 10 seconds */
-static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000;
+#define DEFAULT_TIMER_PERIOD 10UL
 
 /* Print out statistics on packets dropped */
 static void
@@ -894,18 +892,17 @@ l2fwd_main_loop(struct l2fwd_crypto_options *options)
 			}
 
 			/* if timer is enabled */
-			if (timer_period > 0) {
+			if (options->refresh_period > 0) {
 
 				/* advance the timer */
 				timer_tsc += diff_tsc;
 
 				/* if timer has reached its timeout */
 				if (unlikely(timer_tsc >=
-						(uint64_t)timer_period)) {
+						options->refresh_period)) {
 
 					/* do this only on main core */
-					if (lcore_id == rte_get_main_lcore()
-						&& options->refresh_period) {
+					if (lcore_id == rte_get_main_lcore()) {
 						print_stats();
 						timer_tsc = 0;
 					}
@@ -1481,7 +1478,8 @@ l2fwd_crypto_default_options(struct l2fwd_crypto_options *options)
 {
 	options->portmask = 0xffffffff;
 	options->nb_ports_per_lcore = 1;
-	options->refresh_period = 10000;
+	options->refresh_period = DEFAULT_TIMER_PERIOD *
+					TIMER_MILLISECOND * 1000;
 	options->single_lcore = 0;
 	options->sessionless = 0;
 
-- 
2.21.0