tbb

How does Intel TBB choose the number of threads to used for a parallel section? Is there some kind of specification available? Manny As of TBB Version 2.2 the task scheduler will be automatically initialized and on runtime take care of the numbers of threads to use, if you manually want to change that number, you can use one of the following methods: When you create the scheduler, you can specify the number of threads as tbb::task_scheduler_init init(nthread); else you can use tbb::task_scheduler_init init(tbb::task_scheduler_init::automatic); In this case, tbb scheduler creates as many

Just been looking at the threading building blocks, and as their license, they say it's the GPLv2 with the runtime exception . On the Intel page itself they say that the commercial license is the right one if you need commercial support. So what's the deal if I'm doing a commercial, closed source application which uses the TBB, but I don't need commercial support? Can I still use the open source version, or is this a case where I have to buy the commercial one? After all, I assumed that I can use the libstdc++ in a commercial application without restrictions (i.e. link against it). I believe

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/mingw32/4.6.2/../../../../mingw32/bin/ld.exe: cannot fin d -ltbb collect2: ld returned 1 exit status

I'm planning to start "playing" with task-based parallelism for a cross-platform project. I wanted to use Intel Threading Building Blocks. I'm starting with Windows and Visual Studio. As I just want to prototype for the moment, I'm thinking about "playing" only on windows, then have enough knowledge to use the library on all compatible platforms. I've learned that since VS2010, Microsoft provide a similar library, Parallel Processing Library, that have (almost) the same interface than Intel TBB. Some sources suggest, including TBB's team blog, that they build it together and that it's the same

How can I statically link the intel's TBB libraries to my application? I know all the caveats such as unfair load distribution of the scheduler, but I don't need the scheduler, just the containers, so it's ok. Anyways I know this can be done, although its undocumented, however I just can't seem to find the way to do it right now (although I've seen it before somewhere). So does anyone know or have any clues? thanks This is strongly not recommended: Is there a version of TBB that provides statically linked libraries? TBB is not provided as a statically linked library, for the following reasons*

What does the tbb::scalable_allocator in Intel Threading Building Blocks actually do under the hood ? It can certainly be effective. I've just used it to take 25% off an apps' execution time (and see an increase in CPU utilization from ~200% to 350% on a 4-core system) by changing a single std::vector<T> to std::vector<T,tbb::scalable_allocator<T> > . On the other hand in another app I've seen it double an already large memory consumption and send things to swap city. Intel's own documentation doesn't give a lot away (e.g a short section at the end of this FAQ ). Can anyone tell me what tricks

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. timday 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" #include "tbb/parallel_for.h" #include "tbb/task_scheduler_init.h" #include <iostream> #include