[clang] [llvm] [openmp] [OpenMP][offload] Fix dynamic schedule tracking (PR #97065)

Johannes Doerfert via cfe-commits cfe-commits at lists.llvm.org
Fri Jun 28 10:18:38 PDT 2024


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@@ -0,0 +1,84 @@
+// clang-format off
+// RUN: %libomptarget-compile-generic && %libomptarget-run-generic 2>&1 | %fcheck-generic
+// clang-format on
+
+// UNSUPPORTED: aarch64-unknown-linux-gnu
+// UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: x86_64-pc-linux-gnu
+// UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
+
+// REQUIRES: amdgcn-amd-amdhsa
+
+#include <omp.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int ordered_example(int lb, int ub, int stride, int nteams) {
+  int i;
+  int size = (ub - lb) / stride;
+  double *output = (double *)malloc(size * sizeof(double));
+
+#pragma omp target teams map(from : output[0 : size]) num_teams(nteams)        \
+    thread_limit(128)
+#pragma omp parallel for ordered schedule(dynamic)
+  for (i = lb; i < ub; i += stride) {
+#pragma omp ordered
+    { output[(i - lb) / stride] = omp_get_wtime(); }
+  }
+
+  // verification
+  for (int j = 0; j < size; j++) {
+    for (int jj = j + 1; jj < size; jj++) {
+      if (output[j] > output[jj]) {
+        printf("Fail to schedule in order.\n");
+        free(output);
+        return 1;
+      }
+    }
+  }
+
+  free(output);
+
+  printf("test ordered OK\n");
+
+  return 0;
+}
+
+int NO_order_example(int lb, int ub, int stride, int nteams) {
+  int i;
+  int size = (ub - lb) / stride;
+  double *output = (double *)malloc(size * sizeof(double));
+
+#pragma omp target teams map(from : output[0 : size]) num_teams(nteams)        \
+    thread_limit(128)
+#pragma omp parallel for
----------------
jdoerfert wrote:

why is this not schedule dynamic?

https://github.com/llvm/llvm-project/pull/97065


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