tbb

问题 I have compiled TBB from source using Mingw following the comment #5 in this post: http://software.intel.com/en-us/forums/topic/291331. That went ok. When I try to use the new TBB library in a QtCreator project, I end with this errors (ignore the warning messages): http://postimage.org/image/yrrecugix/ Here's the sample code I tried (I omit the non-tbb code): #include "tbb/task_scheduler_init.h" int main() { tbb::task_scheduler_init init; /// more things. } And here's the .pro file: TEMPLATE

问题 How to install Opencv with TBB enabled? I tried the following: 1) Downloaded the TBB package. 2) Build using the below command mingw32-make compiler=gcc arch=ia32 runtime=mingw default 3) I set the Environmental variable path as "d:\tbb\build\windows_ia32_gcc_mingw_release 3) Now using cmake, I enabled "WITH_TBB" and compiled the opencv. its throwing the below error. [ 22%] Built target pch_Generate_opencv_core Linking CXX shared library ..\..\bin\libopencv_core245.dll c:/mingw/bin/../lib/gcc

问题 Can someone give me a TBB example how to: set the maximum count of active threads. execute tasks that are independent from each others and presented in the form of class, not static functions. 回答1: Here's a couple of complete examples, one using parallel_for , the other using parallel_for_each . Update 2014-04-12 : These show what I'd consider to be a pretty old fashioned way of using TBB now; I've added a separate answer using parallel_for with a C++11 lambda. #include "tbb/blocked_range.h"

问题 I am doing object detection in images using OpenCv library in Java Eclipse. I am using Cascade Classifier Training for this using Haar features. For training the classifier I need to generate some text files, .vec file and finally .xml file on command prompt. I have already generated text files but while making .vec file using opencv_createsamples utility on command prompt, I am getting error: opencv_createsamples command is not recognized. To resolve this I need to build opencv with TBB

问题 My OpenCV CUDA program runs fine using a single NVidia 580GTX, but when using another, it gives the following error: OpenCV Error: Gpu API call (invalid device ordinal) in mallocPitch I know I need TBB to assign a GPU its job, but even though I installed OpenCV with TBB support (followed the willowgarage website), it says TBB support is required (CMake key 'WITH_TBB' must be true ). Any help would really be appreciated since I need this to complete my computer science Master's project. Thanks

问题 I am trying to use tbb::parallel_sort to sort 2 arrays at the same time. Intel's documentation here says https://software.intel.com/en-us/node/506167 The requirements on the iterator and sequence are the same as for std::sort. . This doesn't seem to be the case. My custom iterator works perfectly fine with std::sort but produces a compilation error with tbb::parallel_sort . Please see the code bellow: int main()//needs boost and tbb to compile { int values_size = 6; int nums1[] = {5, 8, 7, 89

问题 Suppose, we have a typical queue consumer loop with a stop flag: class consumer { atomic<bool> keep_running; concurrent_bounded_queue queue; void loop() { while (keep_running) // <- danger zone queue.pop(); } void stop() { keep_running = false; queue.abort(); } }; If used as written, stop will fail when called after the keep_running check but before the pop call since abort only terminates pop calls already in progress. We also can't use a mutex to make sure the check and the pop are

问题 I'm trying to replace a std::unordered_map with a tbb::concurrent_hash_map . My original code: typedef std::unique_ptr<V> V_ptr; std::unordered_map<K, V_ptr> hm; V_ptr v (new V); K k; hm.insert (std::make_pair (k, std::move (v))); compiles fine with clang 3.3. Switching the unordered_map to a concurrent_hash_map: typedef std::unique_ptr<V> V_ptr; tbb::concurrent_hash_map<K, V_ptr> hm; V_ptr v (new V); K k; hm.insert (std::make_pair (k, std::move (v))); results in the error: ...stl_pair.h:105

问题 I recently went to a lecture on the benefits of Parallelism in regards to tapping the power of multicore processors more efficiently for real time 3d graphics applications. This discussion was about C++ and TBB (Threading Building Blocks) (Intel). I have found out about Fork/Join in Java 7 but I would like to learn more about running realtime 3d graphics through OpenGL / JOGL. I have heard that OpenGL/JOGL must exist in one thread. I do not know if this is true. If you have experience with