Summary Programmable Packet Scheduling with SP-PIFO arxiv.org
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Programmable packet scheduling allows for scheduling algorithms in switches without the need for hardware modifications by using an admission-control mechanism and queue-mapping algorithm to approximate PIFO queues.
Slides
Slide Presentation (7 slides)
Key Points
- Programmable packet scheduling allows for the deployment of scheduling algorithms in switches without hardware redesign.
- PACKS is a programmable packet scheduler that approximates the behavior of PIFO queues.
- The use of rank distribution is discussed for admission control in programmable packet scheduling.
- The optimal queue bounds for programmable packet scheduling with SP-PIFO are derived and explained.
- The PACKS algorithm uses a sliding window and quantiles to determine packet admission and queue mapping.
- PACKS achieves the closest-to-PIFO drop distribution and outperforms existing schemes in terms of scheduling inversions and packet drops.
- PACKS consistently outperforms TCP, DCTCP, AIFO, and AFQ in terms of average FCT for short flows.
- Theoretical analysis of PACKS is discussed, including references to related studies and a theorem supporting its claims.
Summaries
23 word summary
Programmable packet scheduling enables scheduling algorithms in switches without hardware redesign. PACKS approximates PIFO queues using an admission-control mechanism and a queue-mapping algorithm.
39 word summary
Programmable packet scheduling allows for the deployment of scheduling algorithms in switches without hardware redesign. PACKS is a programmable packet scheduler that approximates the behavior of PIFO queues. It uses an admission-control mechanism and a queue-mapping algorithm to achieve
515 word summary
Programmable packet scheduling allows for the deployment of scheduling algorithms in switches without hardware redesign. The ideal programmable scheduler is a Push-In First-Out (PIFO) queue, but implementing PIFO queues in hardware is challenging. Existing approaches only approximate one
PACKS is a programmable packet scheduler that approximates the behavior of PIFO queues. It estimates the expected distribution of incoming packet ranks and predicts the admission and scheduling behaviors that a PIFO queue would follow. It achieves this by dynamically adapting the mapping
The summary is organized into separate paragraphs to distinguish distinct ideas for readability: The limitations of AIFO and FIFO are highlighted in an experiment comparing their performance to PIFO and SP-PIFO. PIFO produces no scheduling inversions and drops only packets with
PACKS (Programmable Packet Scheduling with SP-PIFO) is a scheduling algorithm that aims to approximate the behavior of a PIFO (Priority In First Out) queue. It achieves this by using an admission-control mechanism and a queue-m
The text discusses the use of a rank distribution for admission control in programmable packet scheduling. The goal is to find the highest rank, called r drop , in the distribution such that the quantile of the distribution stays below the available buffer capacity. Once
The document discusses the programmable packet scheduling with SP-PIFO. It explains how to compute the optimal queue bounds based on the rank distribution. An upper-bound of the optimal queue bounds is derived by assuming a worst-case scenario. The optimal bounds minimize
The text discusses the optimal bounds for programmable packet scheduling with SP-PIFO. It explains that the optimal bounds are the ones that minimize the difference between the number of packets mapped to each queue and the buffer size of the queue. It states that
The PACKS algorithm is described in the document. It uses a sliding window to monitor the rank distribution of recently enqueued packets and computes quantiles to determine whether to admit incoming packets and how to map them to priority queues. The algorithm scans queues from
In this document, the authors discuss a new method for programmable packet scheduling using SP-PIFO. They measure buffer occupancy levels at enqueue by utilizing a Ghost thread in Tofino 2, which allows them to access queue-occupancy information
PACKS achieves the closest-to-PIFO drop distribution and outperforms existing schemes (SP-PIFO and AIFO) in terms of scheduling inversions and packet drops. It reduces inversions by up to 68% (convex)
PACKS, a programmable packet scheduler, consistently outperforms TCP, DCTCP, AIFO, and AFQ in terms of average FCT for short flows. It reduces average FCTs by significant percentages compared to these schemes. However
The summary includes a list of references that are cited in the document. These references are from various sources such as conferences, journals, and RFCs. The purpose of including these references is to provide a comprehensive list of related work that has been done in
This excerpt discusses the theoretical analysis of Programmable Packet Scheduling with SP-PIFO (PACKS). It references several related studies and presents a theorem to support its claims. The theorem states that under certain conditions, the difference between the drops of PACK