From: David Christensen <drc@linux.vnet.ibm.com>
Date: Wed, 8 May 2019 21:02:43 +0000 (-0500)
Subject: test/barrier: fix for Power CPUs
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=2d119c3baac4409092d064d386deb33d8f61f90f

test/barrier: fix for Power CPUs

The memory barrier test fails on IBM Power 9 systems.  Add additional
barriers to accommodate the weakly ordered model used on Power CPUs.

Fixes: 93da5b59afc9 ("test: introduce memory barrier test case")
Cc: stable@dpdk.org

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---

diff --git a/app/test/test_barrier.c b/app/test/test_barrier.c
index a0b47042f8..43b5f6232c 100644
--- a/app/test/test_barrier.c
+++ b/app/test/test_barrier.c
@@ -92,12 +92,14 @@ plock_lock(struct plock *l, uint32_t self)
 	other = self ^ 1;
 
 	l->flag[self] = 1;
+	rte_smp_wmb();
 	l->victim = self;
 
 	store_load_barrier(l->utype);
 
 	while (l->flag[other] == 1 && l->victim == self)
 		rte_pause();
+	rte_smp_rmb();
 }
 
 static void