Re: [dpdk-dev] [PATCH v8 3/5] eal: use wait event scheme for mcslock
From: Jerin Jacob <hidden>
Date: 2021-10-29 13:56:28
On Fri, Oct 29, 2021 at 1:50 PM Feifei Wang [off-list ref] wrote:
Instead of polling for mcslock to be updated, use wait event scheme for this case. Signed-off-by: Feifei Wang <redacted> Reviewed-by: Ruifeng Wang <redacted>
Acked-by: Jerin Jacob <redacted>
quoted hunk ↗ jump to hunk
--- lib/eal/include/generic/rte_mcslock.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h index 34f33c64a5..b4e07648ff 100644 --- a/lib/eal/include/generic/rte_mcslock.h +++ b/lib/eal/include/generic/rte_mcslock.h@@ -116,8 +116,9 @@ rte_mcslock_unlock(rte_mcslock_t **msl, rte_mcslock_t *me) /* More nodes added to the queue by other CPUs. * Wait until the next pointer is set. */ - while (__atomic_load_n(&me->next, __ATOMIC_RELAXED) == NULL) - rte_pause(); + uintptr_t *next; + next = (uintptr_t *)&me->next; + rte_wait_event(next, UINTPTR_MAX, ==, 0, __ATOMIC_RELAXED); } /* Pass lock to next waiter. */ --2.25.1