[Qemu-devel] [PULL 10/50] qht-bench: relax test_start/stop atomic accesses

[Paolo Bonzini]

From: "Emilio G. Cota" <address@hidden>

test_start/stop are used only as flags to loop on. Barriers are unnecessary,
since no dependent data is transferred among threads apart from the flags
themselves.

This commit relaxes the three accesses to test_start/stop that were
not yet relaxed.

Signed-off-by: Emilio G. Cota <address@hidden>
---
 tests/qht-bench.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/qht-bench.c b/tests/qht-bench.c
index 76360a0..2afa09d 100644
--- a/tests/qht-bench.c
+++ b/tests/qht-bench.c
@@ -193,7 +193,7 @@ static void *thread_func(void *p)
     rcu_register_thread();
 
     atomic_inc(&n_ready_threads);
-    while (!atomic_mb_read(&test_start)) {
+    while (!atomic_read(&test_start)) {
         cpu_relax();
     }
 
@@ -393,11 +393,11 @@ static void run_test(void)
     while (atomic_read(&n_ready_threads) != n_rw_threads + n_rz_threads) {
         cpu_relax();
     }
-    atomic_mb_set(&test_start, true);
+    atomic_set(&test_start, true);
     do {
         remaining = sleep(duration);
     } while (remaining);
-    atomic_mb_set(&test_stop, true);
+    atomic_set(&test_stop, true);
 
     for (i = 0; i < n_rw_threads; i++) {
         qemu_thread_join(&rw_threads[i]);
-- 
1.8.3.1