libstdc ++并行模式:谁在使用它?安全吗?有类似的项目吗? [英] libstdc++ parallel mode: Who's using it? Is it safe? Any similar projects?

问题描述

C ++库的GNU实现支持并行模式，此处解释... >

• 有使用经验吗?好的?不好吗?特别是在正确性和性能方面.
• 是否有一些或多或少认真"的项目正在使用它?
• 您是否将其与全局并行打开开关-D_GLIBCXX_PARALLEL一起使用，还是将其与手动打开特定的并行化功能(例如__gnu_parallel::sort(v.begin(), v.end());)一起使用时小心使用了?
• 是否有任何类似的开源项目?含义:比使用openMP更容易并行化.

感谢您的经验.

Sascha

解决方案

我已将其用于一些小型项目，对于大型stl操作，它具有很好的加速效果.我从未遇到任何问题(我使用了全局开关).但是，我实际上并没有做太多基准测试，您可能希望参考 http ://algo2.iti.kit.edu/singler/mcstl/parallelmode_se.pdf 和here.

• Any experiences in using it? Good ones? Bad ones? Especially regarding correctness, but also performance.
• Are there some "more or less serious" projects using it?
• Do you use it with the global turn-on-parallel switch -D_GLIBCXX_PARALLEL or do you use it carefully with manually turn-on specific parallelization functions like: __gnu_parallel::sort(v.begin(), v.end());?
• Are there any similar open source projects? Meaning: more easy parallelization than using openMP.

Thanks for your experiences.

Sascha

解决方案

I've used it for some small projects, with a nice speedup for large stl operations. I never encountered any problems (I used the global switch). However I didn't really do much benchmarking, you might want to refer to studies like http://algo2.iti.kit.edu/singler/mcstl/parallelmode_se.pdf and http://ls11-www.cs.uni-dortmund.de/people/gutweng/AD08/VO11_parallel_mode_overview.pdf.

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