From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Sun, 24 Nov 2013 14:22:10 +0000 (+0000)
Subject: Disable multithreading path when not using more than one thread.
X-Git-Tag: v8.1.0~183
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0a679633aee68f3401d4633956e26f0769ebbf5;p=dealii.git

Disable multithreading path when not using more than one thread.

git-svn-id: https://svn.dealii.org/trunk@31784 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/include/deal.II/matrix_free/matrix_free.templates.h b/deal.II/include/deal.II/matrix_free/matrix_free.templates.h
index 4e3d3c463a..0a4fa866e7 100644
--- a/deal.II/include/deal.II/matrix_free/matrix_free.templates.h
+++ b/deal.II/include/deal.II/matrix_free/matrix_free.templates.h
@@ -263,7 +263,8 @@ internal_reinit(const Mapping<dim>                            &mapping,
       // initialize the basic multithreading information that needs to be
       // passed to the DoFInfo structure
 #ifdef DEAL_II_WITH_THREADS
-      if (additional_data.tasks_parallel_scheme != AdditionalData::none)
+      if (additional_data.tasks_parallel_scheme != AdditionalData::none &&
+          multithread_info.n_threads() > 1)
         {
           task_info.use_multithreading = true;
           task_info.block_size = additional_data.tasks_block_size;