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How to do a parallel_reduce in TBB to append std::vector?

I've defined this reduction in OpenMP:

       std::vector<FindAffineShapeArgs> v;
    #pragma omp declare reduction(mergeFindAffineShapeArgs : std::vector<FindAffineShapeArgs> : omp_out.insert(omp_out.end(), omp_in.begin(), omp_in.end()))
    #pragma omp parallel for collapse(2) schedule(dynamic,1) reduction(mergeFindAffineShapeArgs : findAffineShapeArgs)
    for(int i=0; i<n; i++){
       v.push_back(//something);
    }

In few words, the reduction operation appends each local version of `v` to the global one.

Build tbb with Intel compiler

Hi -

I'm trying to build tpp using the intel compiler. The bin directory containing it is on my $PATH. There is a CXX environment variable that contains icpc and a CC environment variable that contains icc, but when I run make it uses gcc. I am doing the build on CentOS 7.

Is there something I'm not doing that will make it use the intel compiler?

Thanks,
Craig

Why is TBB spawning more threads than expected?

 Hello, I recently updated my TBB to the current version

I use tbb::task_scheduler_init::default_num_threads() to intialize the task scheduler.

This is called once on the main thread.

This value is 8 on my computer.

I also spawn 2 slow-task threads(File IO etc) using the std::thread pulled in from #include "tbb/compat/thread"

Previously this resulted 1 main thread + 7(or 8?) TBB worker threads + 2 slow tasks threads as expected..

Now I am having an issue where TBB is spawning more and more worker threads.

I'm seeing 10-12 etc. 

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  • Memory corruption in scalable_allocator

    I am currently using TBB 4.4 Update 5 and I am seeing some crashes in our environment and most of the dumps that are generated point to scalable_malloc failing but I am not sure whether there is a bug in our code or in that of TBB. I saw the release notes for Update 6 and it mentions that some bug regarding memory corruption was fixed. Is there any way to know what is the bug that was fixed or what evidence I can look for in the dumps which will point me to identify if this was caused by the bug in TBB. 

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