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offload inside parallel region: problem with private allocatable

hi,

I'm trying to offload some computation inside a parallel OMP region. I have problems with a PRIVATE allocatable array. I paste here simple code that shows the problem. The first time the offloaded code works as it should. The second time, the ALLOCATABLE variable p4 is not updated on the MIC.

The output is:

OpenMP scheduling overhead and analysis

Hi, all

I was programming with OpenMP,  and some points are not clear to me. 

1) Does OpenMP of Intel has better performance than the GCC version? If it is true, how much benefit can Intel version gets?

2) will  OpenMP compiler and runtime introduce barrier or memory fence operations? How to measure the overhead of these operations.

3) Does the overhead of scheduling in OpenMP increases with the increasing of thread number? Are there some methods to measure the overhead? (Either intel or GCC version is ok.)

Offload pointer in struct

Hello,

I'm new to MIC programming, so this is probably a silly question, but I've searched and could not find a solution.

I have a struct with a pointer in it and I want to offload that pointer (the array) to MIC. AFAIK, I can't offload the whole struct, because it's not bitwise copyable. But I was hoping I could offload just the pointer, as a normal array. Below is a minimal example, which segfaults. What am I doing wrong?

As a side question, what are my options if I need to copy the whole struct?

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