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examples/server_node_efd: use compiler atomics for sync

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Convert rte_atomic32_test_and_set to compiler CAS atomic
operation for display_stats sync.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
This commit is contained in:
Joyce Kong 2021-10-13 13:54:06 -05:00 committed by David Marchand
parent 14215f34e8
commit 4773be5875
1 changed files with 4 additions and 3 deletions
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7
examples/server_node_efd/server/main.c
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@ -22,7 +22,6 @@
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_atomic.h>
#include <rte_ring.h>
#include <rte_log.h>
#include <rte_debug.h>
@ -178,10 +177,12 @@ static int
sleep_lcore(__rte_unused void *dummy)
{
/* Used to pick a display thread - static, so zero-initialised */
static rte_atomic32_t display_stats;
static uint32_t display_stats;
/* Only one core should display stats */
if (rte_atomic32_test_and_set(&display_stats)) {
uint32_t display_init = 0;
if (__atomic_compare_exchange_n(&display_stats, &display_init, 1, 0,
__ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
const unsigned int sleeptime = 1;
printf("Core %u displaying statistics\n", rte_lcore_id());