[dpdk-dev] [PATCH v1 01/12] test/pmd_perf: use compiler atomic builtins for polling sync

[Joyce Kong <joyce.kong@arm.com>]

Convert rte_atomic usages to compiler atomic built-ins
for polling sync in pmd_perf test cases.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 app/test/test_pmd_perf.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/app/test/test_pmd_perf.c b/app/test/test_pmd_perf.c
index 3a248d512c..41ef001b90 100644
--- a/app/test/test_pmd_perf.c
+++ b/app/test/test_pmd_perf.c
@@ -10,7 +10,6 @@
 #include <rte_cycles.h>
 #include <rte_ethdev.h>
 #include <rte_byteorder.h>
-#include <rte_atomic.h>
 #include <rte_malloc.h>
 #include "packet_burst_generator.h"
 #include "test.h"
@@ -526,7 +525,7 @@ main_loop(__rte_unused void *args)
 	return 0;
 }
 
-static rte_atomic64_t start;
+static uint64_t start;
 
 static inline int
 poll_burst(void *args)
@@ -564,8 +563,7 @@ poll_burst(void *args)
 		num[portid] = pkt_per_port;
 	}
 
-	while (!rte_atomic64_read(&start))
-		;
+	rte_wait_until_equal_64(&start, 1, __ATOMIC_RELAXED);
 
 	cur_tsc = rte_rdtsc();
 	while (total) {
@@ -617,7 +615,7 @@ exec_burst(uint32_t flags, int lcore)
 	pkt_per_port = MAX_TRAFFIC_BURST;
 	num = pkt_per_port * conf->nb_ports;
 
-	rte_atomic64_init(&start);
+	__atomic_store_n(&start, 0, __ATOMIC_RELAXED);
 
 	/* start polling thread, but not actually poll yet */
 	rte_eal_remote_launch(poll_burst,
@@ -625,7 +623,7 @@ exec_burst(uint32_t flags, int lcore)
 
 	/* Only when polling first */
 	if (flags == SC_BURST_POLL_FIRST)
-		rte_atomic64_set(&start, 1);
+		__atomic_store_n(&start, 1, __ATOMIC_RELAXED);
 
 	/* start xmit */
 	i = 0;
@@ -642,7 +640,7 @@ exec_burst(uint32_t flags, int lcore)
 
 	/* only when polling second  */
 	if (flags == SC_BURST_XMIT_FIRST)
-		rte_atomic64_set(&start, 1);
+		__atomic_store_n(&start, 1, __ATOMIC_RELAXED);
 
 	/* wait for polling finished */
 	diff_tsc = rte_eal_wait_lcore(lcore);
-- 
2.17.1