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examples/multi_process: use compiler atomics for sync

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Convert rte_atomic32_test_and_set usage to compiler atomic
CAS 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 13:54:01 -05:00 committed by David Marchand
parent 5bd3c386b2
commit 9b882c5b87
1 changed files with 4 additions and 3 deletions
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7
examples/multi_process/client_server_mp/mp_server/main.c
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@ -20,7 +20,6 @@
#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>
@ -158,10 +157,12 @@ 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;
uint32_t status = 0;
/* Only one core should display stats */
if (rte_atomic32_test_and_set(&display_stats)) {
if (__atomic_compare_exchange_n(&display_stats, &status, 1, 0,
__ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
const unsigned sleeptime = 1;
printf("Core %u displaying statistics\n", rte_lcore_id());