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authorGravatar Craig Tiller <ctiller@google.com>2016-05-02 22:13:48 -0700
committerGravatar Craig Tiller <ctiller@google.com>2016-05-02 22:13:48 -0700
commit18879dcff91209abb0e5851b2e78efbecf341a6b (patch)
treec9b80b097fc804f439906881da0bc695160a323c /test/core
parente49429587bbf01ff741a218c86a11fe2b59a0b5c (diff)
Add cacheline padding, and a test
Diffstat (limited to 'test/core')
-rw-r--r--test/core/support/mpscq_test.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/test/core/support/mpscq_test.c b/test/core/support/mpscq_test.c
new file mode 100644
index 0000000000..393949dc52
--- /dev/null
+++ b/test/core/support/mpscq_test.c
@@ -0,0 +1,124 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/support/mpscq.h"
+
+#include <stdlib.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+#include "test/core/util/test_config.h"
+
+typedef struct test_node {
+ gpr_mpscq_node node;
+ size_t i;
+ size_t *ctr;
+} test_node;
+
+static test_node *new_node(size_t i, size_t *ctr) {
+ test_node *n = gpr_malloc(sizeof(test_node));
+ n->i = i;
+ n->ctr = ctr;
+ return n;
+}
+
+static void test_serial(void) {
+ gpr_log(GPR_DEBUG, "test_serial");
+ gpr_mpscq q;
+ gpr_mpscq_init(&q);
+ for (size_t i = 0; i < 10000000; i++) {
+ gpr_mpscq_push(&q, &new_node(i, NULL)->node);
+ }
+ for (size_t i = 0; i < 10000000; i++) {
+ test_node *n = (test_node *)gpr_mpscq_pop(&q);
+ GPR_ASSERT(n);
+ GPR_ASSERT(n->i == i);
+ gpr_free(n);
+ }
+}
+
+typedef struct {
+ size_t ctr;
+ gpr_mpscq *q;
+} thd_args;
+
+#define THREAD_ITERATIONS 1000000
+
+static void test_thread(void *args) {
+ thd_args *a = args;
+ for (size_t i = 1; i <= THREAD_ITERATIONS; i++) {
+ gpr_mpscq_push(a->q, &new_node(i, &a->ctr)->node);
+ }
+}
+
+static void test_mt(void) {
+ gpr_log(GPR_DEBUG, "test_mt");
+ gpr_thd_id thds[100];
+ thd_args ta[GPR_ARRAY_SIZE(thds)];
+ gpr_mpscq q;
+ gpr_mpscq_init(&q);
+ for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+ gpr_thd_options options = gpr_thd_options_default();
+ gpr_thd_options_set_joinable(&options);
+ ta[i].ctr = 0;
+ ta[i].q = &q;
+ GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+ }
+ size_t num_done = 0;
+ size_t spins = 0;
+ while (num_done != GPR_ARRAY_SIZE(thds)) {
+ gpr_mpscq_node *n;
+ while ((n = gpr_mpscq_pop(&q)) == NULL) {
+ spins++;
+ }
+ test_node *tn = (test_node *)n;
+ GPR_ASSERT(*tn->ctr == tn->i - 1);
+ *tn->ctr = tn->i;
+ if (tn->i == THREAD_ITERATIONS) num_done++;
+ gpr_free(tn);
+ }
+ gpr_log(GPR_DEBUG, "spins: %d", spins);
+ for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+ gpr_thd_join(thds[i]);
+ }
+ gpr_mpscq_destroy(&q);
+}
+
+int main(int argc, char **argv) {
+ grpc_test_init(argc, argv);
+ test_serial();
+ test_mt();
+ return 0;
+}