From 19f5a3eff4164d12fcefaa2bd112c67049b8708d Mon Sep 17 00:00:00 2001
From: Devendar Bureddy <devendar@mellanox.com>
Date: Sat, 18 Apr 2015 00:33:49 +0300
Subject: [PATCH] HCOLL: skip hcoll if enable_mpi_threads is true

reasons:
    1) default OCOMS is not configured with --enable-ocoms-multi-threads
    2) locking overheads
---
 ompi/mca/coll/hcoll/coll_hcoll_module.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ompi/mca/coll/hcoll/coll_hcoll_module.c b/ompi/mca/coll/hcoll/coll_hcoll_module.c
index 725ce74277..0f150a3b51 100644
--- a/ompi/mca/coll/hcoll/coll_hcoll_module.c
+++ b/ompi/mca/coll/hcoll/coll_hcoll_module.c
@@ -18,6 +18,11 @@ int hcoll_comm_attr_keyval;
  */
 int mca_coll_hcoll_init_query(bool enable_progress_threads, bool enable_mpi_threads)
 {
+
+    if (enable_mpi_threads) {
+        HCOL_VERBOSE(1, "MPI_THREAD_MULTIPLE not suppported; skipping hcoll component");
+        return OMPI_ERROR;
+    }
     return OMPI_SUCCESS;
 }