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[v2,2/2] mcslock: use wait until equal API for tight loop

Message ID 20211020030335.973360-3-feifei.wang2@arm.com (mailing list archive)
State Accepted, archived
Delegated to: David Marchand
Headers show
Series replace tight loop with wait until equal api | expand


Context Check Description
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-x86_64-compile-testing success Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/github-robot: build success github build: passed
ci/iol-aarch64-compile-testing success Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/checkpatch success coding style OK

Commit Message

Feifei Wang Oct. 20, 2021, 3:03 a.m. UTC
Instead of polling for previous lock holder unlocking, use
wait_until_equal API.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
 lib/eal/include/generic/rte_mcslock.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h
index 9f323bd2a2..34f33c64a5 100644
--- a/lib/eal/include/generic/rte_mcslock.h
+++ b/lib/eal/include/generic/rte_mcslock.h
@@ -84,8 +84,7 @@  rte_mcslock_lock(rte_mcslock_t **msl, rte_mcslock_t *me)
 	 * to spin on me->locked until the previous lock holder resets
 	 * the me->locked using mcslock_unlock().
-	while (__atomic_load_n(&me->locked, __ATOMIC_ACQUIRE))
-		rte_pause();
+	rte_wait_until_equal_32((uint32_t *)&me->locked, 0, __ATOMIC_ACQUIRE);