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Mac install location conflicts with code signing

tbb dylibs on the Mac are built with an install name path (otool -D) of "libtbb.dylib" (and similar names for all the other tbb libraries), which means that if you link with them as-is and place it inside an app package in the Apple-recommended location, they won't be found and you'll die on launch with

dyld: Library not loaded: libtbb_debug.dylib

  Referenced from: /Users/williams/photoshop/main/photoshop/Targets/Debug_x86_64/Adobe Photoshop CC 2015.app/Contents/MacOS/Adobe Photoshop CC 2015

  Reason: image not found

simple vector addition

 

Hello,

I have a question w.r.t below scenario on Intel Sandy Bridge,

For simple vector addition code in C,

If I do dynamic memory allocation it vectorizes the main addition loop

    C[i] = A[i] + B[i]

even if I do not use any restrict keyword (icc 13)

But if I statically allocate arrays, it does not vectorize loop nor it specifies something about it in vectorization report.

Even if I do allocation using declspec(align) it does not vectorize.

What can be the causes ?

Thanks in advance,

  Chaitali

 

Sparse Matrix mkl_?csrmultd problem

Hello,

I want to use the mkl_?csrmultd to do 2 matrix product and the output is a dense matrix.

But i am confused when i read the manual, The ldc (leading dimension of dense matrix C) is a output  parameters( not a input parameter as usual ?), and the length of ib is m+1. The definition of ia is also very different with other sparse matrix routines, because the length is not m+1. 

Is there any problem about this part?

Any help and comment will be appreciated.

 

Jiajun

 

Vectorization of a function call

Hello,

I have a following problem: I have a big loop inside my program that I want to parallelize and vectorize. Inside the loop I do a lot of math computations, but there are no dependencies between the iterations. However, inside the loop I call a simple function that returns minimum of two values, or zero, if the minimum value is negative. Generally, it looks like that:

Memory leak?

Hi,

I have a C++ application which is coded this way:

  • The main program does not need much memory (just a few variables). But this main program runs a loop in which we call a function.
  • This function needs about 140 MB of memory to run. The memory is allocated in the function and then released (using RAII).

When I run this program overnight on OSX, here is the data I get from "Activity Monitor", or "top" in terms of memory consumption

C examples in MKL's ScaLAPACK

I am aware of these examples, but I do not know any Fortran, thus I can not understand much. So finding at least an example with MKL and ScaLAPACK in C would be critical for me. I know there is a C interface. For example p?potrf will be the function I am going to use, for performing a Cholesky factorization.

If someone would reply negatively, that would be also OK, since it would stop me for searching..

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