Transfer files from RAD repository

tests/sos_tests/mt_contention.cpp

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+/*
+ *  Copyright (c) 2018 Intel Corporation. All rights reserved.
+ *  This software is available to you under the BSD license below:
+ *
+ *      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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/* Multithreaded Contention Test: Overlapping AMO/quiet on a shared (default)
+ * context */
+
+#include <assert.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <roc_shmem/roc_shmem.hpp>
+
+using namespace rocshmem;
+
+#define T 8
+
+long *dest;
+
+int me, npes;
+int errors = 0;
+
+static void *thread_main(void *arg) {
+  int tid = *(int *)arg;
+  int i;
+
+  /* Threads increment the counter on each PE and then performs a quiet.
+   * All threads use the default context; thus, this checks that quiet
+   * with overlapping AMOs behaves correctly. */
+
+  for (i = 1; i <= npes; i++)
+    roc_shmem_int64_atomic_add(dest, tid, (me + i) % npes);
+
+  roc_shmem_quiet();
+
+  return NULL;
+}
+
+int main(int argc, char **argv) {
+  int tl, i, ret;
+  pthread_t threads[T];
+  int t_arg[T];
+
+  roc_shmem_init_thread(ROC_SHMEM_THREAD_MULTIPLE, &tl);
+
+  if (tl != ROC_SHMEM_THREAD_MULTIPLE) {
+    printf("Init failed (requested thread level %d, got %d)\n",
+           ROC_SHMEM_THREAD_MULTIPLE, tl);
+    roc_shmem_global_exit(1);
+  }
+
+  me = roc_shmem_my_pe();
+  npes = roc_shmem_n_pes();
+
+  if (me == 0)
+    printf("Starting multithreaded test on %d PEs, %d threads/PE\n", npes, T);
+
+  dest = (long *)roc_shmem_malloc(sizeof(long));
+  *dest = 0;
+
+  for (i = 0; i < T; i++) {
+    int err;
+    t_arg[i] = i;
+    err = pthread_create(&threads[i], NULL, thread_main, (void *)&t_arg[i]);
+    assert(0 == err);
+  }
+
+  for (i = 0; i < T; i++) {
+    int err;
+    err = pthread_join(threads[i], NULL);
+    assert(0 == err);
+  }
+
+  roc_shmem_sync_all();
+
+  if ((*dest) != ((T - 1) * T / 2) * npes) {
+    printf("%d: dest = %ld, expected %d\n", me, *dest,
+           ((T - 1) * T / 2) * npes);
+    errors++;
+  }
+
+  roc_shmem_free(dest);
+
+  roc_shmem_finalize();
+  return (errors == 0) ? 0 : 1;
+}