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Diffstat (limited to 'doc/TopicMultithreading.dox')
| -rw-r--r-- | doc/TopicMultithreading.dox | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/TopicMultithreading.dox b/doc/TopicMultithreading.dox index 95f6bf287..47c9b261f 100644 --- a/doc/TopicMultithreading.dox +++ b/doc/TopicMultithreading.dox @@ -43,6 +43,8 @@ int main(int argc, char** argv) } \endcode +\note With Eigen 3.3, and a fully C++11 compliant compiler (i.e., <a href="http://en.cppreference.com/w/cpp/language/storage_duration#Static_local_variables">thread-safe static local variable initialization</a>), then calling \c initParallel() is optional. + \warning note that all functions generating random matrices are \b not re-entrant nor thread-safe. Those include DenseBase::Random(), and DenseBase::setRandom() despite a call to Eigen::initParallel(). This is because these functions are based on std::rand which is not re-entrant. For thread-safe random generator, we recommend the use of boost::random or c++11 random feature. In the case your application is parallelized with OpenMP, you might want to disable Eigen's own parallization as detailed in the previous section. |