Intel® Parallel Composer

How can I parallelize implicit loop ?

I have the loop, inside its body running the function with array member (dependent on loop index) as an argument, and returning one value.
I can parallelized this loop by using cilk_for() operator instead of regular for() - and it is simple and works well.  This is explicit parallelization.  
Instead of explicit loop instruction I can use Array Notation contruction (as shown below) - it is implicit loop.
My routine is relatively long and complecs, and has Array Notation constructions inside, so it cannot be declared as a vector (elemental) one.

Patches or configure options to build the trunk on arm

Hello, 

I want to build the trunk on an embedded system supporting armv7 instructions. The build was accomplished without errors but cilk/cilk.h and libcilkrts weren't built. I checked out the patches available on the internet they do support non x86 architectures but I think just i386 not arm.

Are there other patches or config options to add while building so that I get those libraries along with the build 

Regards   

面向英特尔® 至强融核™ 协处理器(和英特尔® 至强® 处理器)架构应用的浮点计算 R2R 再现性

 

问题

如果在相同处理器上针对相同输入数据重新运行相同的程序,得到的结果相同吗?

串行代码

串行代码浮点运算结果的差异的唯一已知来源是由外部环境更改引发的数据调整。 例如,用户动态分配了一个包含日期的新字符串。 该字符串的大小随一年中的月份或周的日期而不同,因此需要对分配的日期进行后续调整。 调整范围决定着哪些循环迭代是循环开头或循环结尾(remainder loop)的组成部分,以及哪些是矢量化内核的组成部分。 这反过来影响浮点约分运算的顺序;按照指定精度对不同直接结果执行舍入处理可缩小最终结果的差异范围。 开头、结尾和内核之间的优化不同可得出相似的差异范围。 这些差异范围可通过以下两个方式预防:

1)      通过调整在运行时间分配的任何数据。 对于 C/C++ 编程,可使用经过调整的 malloc/calloc/free 版本等等,例如 _mm_malloc() 和 _mm_free() 或 Posix 类型。 对于 Fortran 编程,!DIR$ ATTRIBUTES ALIGN:64 :: 阵列指令,或命令行交换 -align array64byte (推荐)。 数据调整为 64 位边界也具有性能优势。

  • Sviluppatori
  • Apple OS X*
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Microsoft Windows* 8.x
  • C/C++
  • Fortran
  • Compilatore C++ Intel®
  • Intel® C++ Composer XE
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  • Intel® Fortran Composer XE
  • Intel® Parallel Composer
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  • floating-point
  • reproducibility
  • Architettura Intel® Many Integrated Core
  • Diagnostic 2580: incorrect vector attribute:parameter for variable step should be scalar

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  • error
  • warning
  • remark
  • Diagnostic 2598: cilk_spawn of array notation function call is not supported

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    Please let us know of your experience with this diagnostic message by posting a comment below. Your interest in this diagnostic will help us prioritize the order we document diagnostics.

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  • error
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  • Diagnostic 2614: a function declarator with a trailing return type must be preceded by a simple "auto" type specifier

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  • Iscriversi a Intel® Parallel Composer