c++parallel-processingtbbxeon-phicilk-plus

Intel TBB and Cilk Plus thread affinity on Intel MIC

I would like to write parallel code for Intel Xeon Phi using Intel TBB and Cilk Plus but i have a problem with thread affinity. I want to bind one thread to one logical core. Is is possible to set affinity like in OpenMP? I mean KMP_AFFINITY="compact". Thank you in advance. :)

Solution

  • Yes, it's possible and moreover it is recommended in conjunction with affinity_partitioner on Xeon Phi. Please see the blog for details. Here is a short code snippet to give you idea how does it look like:

    class pinning_observer: public tbb::task_scheduler_observer {
public:
    pinning_observer();
    /*override*/ void on_scheduler_entry( bool );
    ~pinning_observer();
};

pinning_observer pinner;
pinner.observe( true );

    There are no any special means for doing so in Cilk Plus.