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首页> 外文期刊>Computer Graphics and Applications, IEEE >Wait-Free Shared-Memory Irradiance Caching
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Wait-Free Shared-Memory Irradiance Caching

机译:无等待共享内存辐照度缓存

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摘要

Parallelizing rendering algorithms to exploit multiprocessor and multicore machines isn''t straightforward. Certain methods require frequent synchronization among threads to obtain benefits similar to the sequential algorithm. One such algorithm is the irradiance cache (IC), an acceleration data structure that caches indirect diffuse irradiance values. In multicore systems, the threads must share the IC to achieve high efficiency. A proposed wait-free mechanism for accessing the shared IC doesn''t use the common blocking or busy-waiting methods, thus avoiding most serialization and reducing contention. A comparison with two classic approachesȁ4;a lock-based mechanism and a local-write techniqueȁ4;on two systems with up to 24 cores shows that the wait-free approach significantly reduces synchronization overhead, thus improving performance. The Web extra PDF augments the article. The Web extra video is an animation that demonstrates the wait-free IC system running at close to interactive rates on an 8-core machine.
机译:并行渲染算法以利用多处理器和多核计算机并非易事。某些方法需要频繁地在线程之间进行同步以获得类似于顺序算法的好处。一种这样的算法是辐照度缓存(IC),这是一种加速数据结构,用于缓存间接漫射辐照度值。在多核系统中,线程必须共享IC以实现高效率。提出的用于访问共享IC的免等待机制不使用常见的阻塞或繁忙等待方法,从而避免了大多数序列化并减少了争用。在两个具有24个内核的系统上,与两种经典方法[4],基于锁的机制和本地写入技术[4]的比较表明,免等待方法显着减少了同步开销,从而提高了性能。 Web额外的PDF增加了这篇文章。网络附加视频是一个动画,演示了免等待IC系统在8核计算机上以接近交互速率运行的情况。

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