[分享] RcppParallel

[celestialgod (攸藍)]

[關鍵字]: Rcpp, parallel computing

[出處]: http://rcppcore.github.io/RcppParallel/#examples

[重點摘要]:

RcppParallel provides a complete toolkit for creating portable,
high-performance parallel algorithms without requiring direct manipulation of
operating system threads. RcppParallel includes:

Intel Thread Building Blocks (v4.3), a C++ library for task parallelism with
a wide variety of parallel algorithms and data structures (Windows, OS X,
Linux, and Solaris x86 only).

TinyThread, a C++ library for portable use of operating system threads.

RVector and RMatrix wrapper classes for safe and convenient access to R data
structures in a multi-threaded environment.

High level parallel functions (parallelFor and parallelReduce) that use Intel
TBB as a back-end on systems that support it and TinyThread on other
platforms.


我自己試做了用RcppArmadillo配上RcppParallel：

http://pastebin.com/KLwySJey

http://pastebin.com/PPhkVv6x (只有p小時會快，p變大會漸慢)

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推 cywhale: 3Q~ What's diff among RcppParallel, snow or foreach..
snow, foreach是以R的function做為基礎的平行設計

推 cywhale: 翻看Rcpp parallel關鍵字文章看到Norm Matloff部落格
→ cywhale: 之前少注意也許大大們都知https://matloff.wordpress.com
→ cywhale: 也有一些Parallel package Rth?沒有實作真的不知道差異
→ cywhale: 只是題外話 anyway感謝版大介紹，慢慢再消化了..
rth我記得是parallel some R functions...

有點久遠不復記憶了XDD
※ 編輯: celestialgod (1.163.8.105), 08/07/2015 16:41:00