roofline

简明释义

英[ˈruːfˌlaɪn]美[ˈrʊfˌlaɪn]

n. 屋顶轮廓线；车顶轮廓线

英英释义

单词用法

同义词

反义词

例句

1.Its hatch is bigger than most and its rear roofline is fairly high, so it accommodated my sons' two small bicycles with space to spare — a big surprise.

它的后舱门比一般小车都要大而且它的后车顶也相当高，让我惊讶的是它在容纳了我儿子的两辆儿童自行车之后还有多余的空间。

2.The dune's irregular shape is echoed by the varying height of the building's roofline, which responds to the requirements of the internal programme and the arrangement of the various split levels.

沙丘的不规则形状通过不同高度的建筑的屋顶呼应，它响应内部安排的要求以及各种水平面的安排。

3.That wider stance also allowed designers to give the vehicle a more muscular stance with a lower roofline without compromising headroom.

更宽的车身也使得设计者在增加车身肌肉感的同时而不减小车内空间。

4.They are shielded behind aluminium screens featuring a repeat pattern that references traditional mashrabiya latticework. This pattern echoes the angles of the building's roofline.

它们被遮蔽在铝制的屏障后面，屏障以一种重复的图案为特色，这也参考了传统的窗花格子。这种图案与建筑屋檐线的角度产生回应。

5.An entrance to the community center is notched into the roofline, connecting the buildings on the same plane.

社区中心的入口由部分屋顶轮廓线内凹形成，在同一平面上与建筑相连。

6.Its curvaceous body is topped by a coupe-like roofline.

其婀娜多姿的身体首位的是一轿跑车般的车顶。

7.Protruding barrel-vaulted zinc roofs provide a dynamic roofline, evoking silhouettes of the Abbey and hinting at the drama within.

突出的锌板拱顶形成动态的屋顶轮廓线，让人想起修道院的轮廓，也暗示了戏剧性的内部空间。

8.A curving roofline dips down soasnot to obstruct views to and from the manor, but sweeps upwards to form a more prominent facade at one end, where the landscape descendstowards the lake.

建筑弧线形的屋檐线在靠近庄园的那一端缓缓下降，不至于阻碍庄园的景观视线，然而在靠近湖的一边徐徐上升用以打造一个突出的立面效果。

9.The city has regulations regarding the height of rooflines in historic districts.

该市对历史区的屋顶线高度有规定。

10.The roofline of that old church is particularly striking against the skyline.

那座古老教堂的屋顶线在天际线中尤为引人注目。

11.From my window, I can see the roofline of the neighboring buildings.

从我的窗户可以看到邻近建筑的屋顶线。

12.We need to paint the roofline of the house before winter arrives.

在冬天来临之前，我们需要给房子的屋顶线上漆。

13.The architect designed the house with a steep roofline to allow for better water drainage.

建筑师设计的房子有一个陡峭的屋顶线，以便更好地排水。

作文

In the world of computer architecture, the term roofline refers to a performance model that helps in understanding the limitations of a computing system. It is a visual representation that illustrates the maximum achievable performance of a system based on its computational capabilities and memory bandwidth. The roofline model is particularly useful for developers and engineers as it provides insight into how to optimize their applications to achieve better performance. By analyzing the roofline, one can identify whether a program is limited by computation or memory bandwidth, which are two critical factors in determining overall system efficiency.The concept of roofline can be broken down into two main components: the performance ceiling and the operational intensity. The performance ceiling represents the maximum performance a system can achieve given its hardware specifications, while operational intensity is the ratio of floating-point operations to memory operations. This relationship is crucial because it allows programmers to see where their applications stand in relation to the theoretical limits of the hardware they are using.For instance, if an application has low operational intensity, it means that it is performing many memory operations compared to floating-point calculations. In this scenario, the application is likely to be memory-bound, meaning that its performance is limited by the speed at which data can be retrieved from memory rather than the speed of the processor itself. Conversely, if an application has high operational intensity, it indicates that it is computation-bound, where the performance is limited by the processing power of the CPU or GPU.Understanding the roofline model can significantly impact performance tuning. Developers can use this knowledge to refactor their code, optimize algorithms, and make better decisions about data structures and memory usage. For example, if a developer identifies that their application is memory-bound, they might look into optimizing memory access patterns, increasing cache usage, or reducing data transfer between different levels of memory hierarchy.Moreover, the roofline model is not only applicable to traditional CPU architectures but also to modern parallel computing systems, including GPUs and distributed computing environments. As these systems become more prevalent, understanding the roofline becomes increasingly important for ensuring that applications can fully utilize the underlying hardware capabilities.In conclusion, the roofline model serves as a powerful tool for understanding and optimizing the performance of computing systems. By providing a clear visual representation of the relationship between performance and operational intensity, it allows developers to make informed decisions that can lead to significant improvements in application efficiency. Whether working on high-performance computing tasks or developing software for everyday use, grasping the concept of roofline can be a game-changer in achieving optimal performance.

在计算机架构的世界中，术语roofline指的是一种性能模型，帮助理解计算系统的限制。它是一种视觉表示，说明了基于计算能力和内存带宽，系统可以达到的最大性能。roofline模型对开发人员和工程师特别有用，因为它提供了洞察力，帮助他们优化应用程序以实现更好的性能。通过分析roofline，人们可以识别程序是受计算还是内存带宽的限制，这两个因素对于确定整体系统效率至关重要。roofline的概念可以分为两个主要组成部分：性能上限和操作强度。性能上限代表给定硬件规格时，系统可以达到的最大性能，而操作强度是浮点操作与内存操作的比率。这种关系至关重要，因为它使程序员能够看到他们的应用程序与所使用硬件的理论极限之间的关系。例如，如果一个应用程序具有低操作强度，这意味着它执行的内存操作相对于浮点计算来说很多。在这种情况下，应用程序可能会受到内存的限制，这意味着其性能受到从内存中检索数据速度的限制，而不是处理器本身的速度。相反，如果一个应用程序具有高操作强度，则表示它受计算能力的限制，其性能受到CPU或GPU的处理能力的限制。理解roofline模型可以显著影响性能调优。开发人员可以利用这一知识重构代码，优化算法，并在数据结构和内存使用方面做出更好的决策。例如，如果开发人员识别到他们的应用程序受内存限制，他们可能会考虑优化内存访问模式、增加缓存使用或减少不同级别内存层次之间的数据传输。此外，roofline模型不仅适用于传统的CPU架构，还适用于现代并行计算系统，包括GPU和分布式计算环境。随着这些系统变得越来越普遍，理解roofline变得越来越重要，以确保应用程序能够充分利用底层硬件的能力。总之，roofline模型作为理解和优化计算系统性能的强大工具。通过提供性能与操作强度之间关系的清晰视觉表示，它使开发人员能够做出明智的决策，从而显著提高应用程序效率。无论是在进行高性能计算任务还是开发日常使用的软件，掌握roofline的概念都可能在实现最佳性能方面成为改变游戏规则的因素。