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Topic

Latency (engineering)

About: Latency (engineering) is a research topic. Over the lifetime, 7278 publications have been published within this topic receiving 115409 citations. The topic is also known as: lag.


Papers
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Journal ArticleDOI
TL;DR: Exploring the scientific possibilities of new therapies targeting HIV-1 latency may hold new promise of eventual HIV- 1 eradication and warrant further consideration for rational drug design.

32 citations

Journal ArticleDOI
TL;DR: This paper proposes a light-weight and load-aware switch-to-controller selection scheme to cut the long-tail response latency under the simple scenario of homogeneous controllers, and designs a general delay-aware switching scheme to fundamentally cut theLong- tail response latency for the more complicated heterogeneous controller scenario with performance fluctuations.
Abstract: To enable the network softwarization, network function virtualization (NFV) and software defined networking (SDN) are integrated to jointly manage and utilize the network resource and virtualized network functions (VNFs). For a network flow resulting from any NFV application, an associated switch would send a routing request to the controller in SDN. The controller then generates and configures a routing path to dynamically steer the flow across appropriate VNFs or service function chains. This process, however, exhibits a skew distribution of response latency with a long tail. Cutting the long-tail latency of response is critical to enable the network softwarization, yet difficult to achieve due to many factors, such as the limited capacities and the load imbalance among controllers. In this paper, we reveal that such flow requests still experience the long-tail response latency, even using the up-to-date controller-to-switch assignment mechanism. To tackle this essential problem, we first propose a light-weight and load-aware switch-to-controller selection scheme to cut the long-tail response latency under the simple scenario of homogeneous controllers, and then design a general delay-aware switch-to-controller selection scheme to fundamentally cut the long-tail response latency for the more complicated heterogeneous controller scenario with performance fluctuations. The comprehensive evaluations indicate that our two new switch-to-controller selection schemes can significantly reduce the long-tail latency and provide higher system throughput.

32 citations

Journal ArticleDOI
TL;DR: Mez as discussed by the authors is a publish-subscribe messaging system for latency sensitive multi-camera machine vision applications at the IoT edge that adapts to channel conditions by dynamically adjusting the video frame quality using the image transformation control knobs.
Abstract: Mez is a novel publish-subscribe messaging system for latency sensitive multi-camera machine vision applications at the IoT Edge The unlicensed wireless communication in IoT Edge systems are characterized by large latency variations due to intermittent channel interference To achieve user specified latency in the presence of wireless channel interference, Mez takes advantage of the ability of machine vision applications to temporarily tolerate lower quality video frames if overall application accuracy is not too adversely affected Control knobs that involve lossy image transformation techniques that modify the frame size, and thereby the video frame transfer latency, are identified Mez implements a network latency feedback controller that adapts to channel conditions by dynamically adjusting the video frame quality using the image transformation control knobs, so as to simultaneously satisfy latency and application accuracy requirements Additionally, Mez uses an application domain specific design of the storage layer to provide low latency operations Experimental evaluation on an IoT Edge testbed with a pedestrian detection machine vision application indicates that Mez is able to tolerate latency variations of up to 10x with a worst-case reduction of 42% of the application accuracy F1 score metric The performance of Mez is also experimentally evaluated against state-of-the-art low latency NATS messaging system

32 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20222
2021485
2020529
2019533
2018500
2017405