Electrical Engineering and Computer Science

CSE Technical Reports Sorted by Technical Report Number

TR Number Title Authors Date Pages

CSE-TR-001-17 AP-atoms: A High-Accuracy Data-Driven Client Aggregatin for Global Load Balancing Yibo Pi, Sugih Jamin, Peter Danzig, Jacob Shaha May , 2017 16
In Internet mapping, IP address space is divided into a set of client aggregation units, which are the finest-grained units for global load balancing. Choosing the proper level of aggregation is a complex and crucial problem, which determines the total number of aggregation units that a mapping system has to maintain and the accuracy of client redirection. In this paper, using Internet-wide measurements provided by a commercial global load balancing service provider, weshow that even for the best existing client aggregation, almost 17% of clients have latency more than 50 ms apart from the average latency of clients in the same aggregation unit. To address this, we propose a data-driven client aggregation, AP-atoms, which can tradeoff scalability for accuracy and adapts to changing network conditions. Our experimentsshow that by using the same scale of client aggregations, AP-atoms can reduce the number of widely dispered clients by almost 2 and the 98-th percentile difference in clients latencies by almost 100 ms.

CSE-TR-002-17 Analysis of Microbump Overheads for 2.5D Disintegrated Design Pete Ehrett, Vidushi Goyal, Opeoluwa Matthews, Reetuparna Das, Todd Austin, Valeria Bertacco November, 2017 3
Systems-in-Package based on 2.5D integration have significant potential to reduce custom-ASIC costs and to improve chip performance over monolithic designs. A common concern about 2.5D integration is that microbumps (μbumps) introduce significant delay and power overhead relative to monolithically integrated systems. We demonstrate that a typical μbump has a delay contribution on the order of tens of attoseconds (10^-17) and power consumption overhead on the order of 1μW/Gbps - values so small that, in current systems with delays in the nanoseconds and power consumption in the hundreds of milliwatts or higher, they may safely be ignored.

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