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An improved phase frequency detector (PFD) and a novel charge pump (CP) for phase locked loop (PLL) applications are presented. The mechanisms for widening the phase error detection range and eliminating the dead zone are applied in the proposed PFD. To maintain a fast locked performance and a stable loop bandwidth for multi-standard frequency synthesizer applications, a programmable structure and...
TCP Incast problem attracts much attention due to the catastrophic goodput drop. In this paper, a goodput model of the problem is built to understand why goodput collapse occurs and a solution to the problem based on the theoretical analysis is proposed. We found that the TCP Incast goodput deterioration is mainly caused by two types of timeouts, one happens at the tail of data blocks and dominates...
The TCP incast problem attracts a lot of attention due to its wide existence in cloud services and catastrophic performance degradation. Some effort has been made to solve it. However, the industry is still struggling with it, such as Facebook. Based on the investigation that the TCP incast problem is mainly caused by the TimeOuts (TOs) occurring at the boundary of the stripe units, this paper presents...
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