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Improving PIE's performance over high-delay paths [article]

Nicolas Kuhn, David Ros
2016 arXiv   pre-print
By means of simulations, we observe that our proposed change does not affect PIE's performance when RTT < 100 ms.  ...  PIE uses a proportional integral controller to maintain the average queuing delay at a desired level; however, large Round Trip Times (RTT) result in large spikes in queuing delays, which induce high dropping  ...  To reduce the RTT sensitivity of PIE and improve the performance of latency sensitive applications over large RTT paths (e.g., rural broadband or satellite access), our proposal, Maximum and Average queuing  ... 
arXiv:1602.00569v1 fatcat:hx7fdqvgxbgtdcaqswoigyofdi

Alternative backoff: Achieving low latency and high throughput with ECN and AQM

Naeem Khademi, Grenville Armitage, Michael Welzl, Sebastian Zander, Gorry Fairhurst, David Ros
2017 2017 IFIP Networking Conference (IFIP Networking) and Workshops  
Using a mix of experiments, theory and simulations with standard NewReno and CUBIC flows, we show significant performance gains in lightlymultiplexed scenarios, without losing the delay-reduction benefits  ...  However, shallow buffering causes noticeable TCP performance degradation when a path's underlying round trip time (RTT) heads above 60 ms to 80 ms (not uncommon with cross-continental and inter-continental  ...  Fig. 3 . 3 Performance through CoDel and PIE bottlenecks is significantly degraded over high-RTT paths (real-life test).  ... 
doi:10.23919/ifipnetworking.2017.8264863 dblp:conf/networking/KhademiAWZFR17 fatcat:4u7vdsz54bdbdhftefyh3qtfcy

Operating ranges, tunability and performance of CoDel and PIE

Nicolas Kuhn, David Ros, Amadou Baba Bagayoko, Chamil Kulatunga, Gorry Fairhurst, Naeem Khademi
2017 Computer Communications  
CoDel and PIE are two recent Active Queue Management (AQM) algorithms that have been proposed to address bufferbloat by reducing the queuing delay while trying to maintain a high bottleneck utilization  ...  This new approach to the problem lets us identify deployment scenarios where both AQM schemes result in poor performance when used with default parameters.  ...  (RTT) and high capacity paths [13] and in low capacity paths [14] .  ... 
doi:10.1016/j.comcom.2016.07.013 fatcat:vjr2veyfgbcrthajdgdvd5hplu

Active Sense Queue Management (ASQM)

Daniel M. Havey, Kevin C. Almeroth
2015 2015 IFIP Networking Conference (IFIP Networking)  
ASQM is an IP layer AQM protocol that has the added benefit of managing Layer 2 link delay, i.e. bufferbloat displacement.  ...  We provide testbed experiments comparing ASQM's bandwidth delay characteristics with traditional AQM algorithms demonstrating ASQM's ability to manage bufferbloat displacement where traditional AQM algorithms  ...  over time) to control the queue, [25] , [27] .  ... 
doi:10.1109/ifipnetworking.2015.7145297 dblp:conf/networking/HaveyA15 fatcat:d4busguk7fbofdvs2flztjryay

MagPIe

Thilo Kielmann, Rutger F. H. Hofman, Henri E. Bal, Aske Plaat, Raoul A. F. Bhoedjang
1999 SIGPLAN notices  
Every sender-receiver path used by an algorithm contains at most one wide area link.  ...  MAGPIE's algorithms send the minimal amount of data over the slow wide area links, and only incur a single wide area latency.  ...  The performance improvements of MAGPIE over MPICH are substantial, and depend on cluster topology, latency, and bandwidth.  ... 
doi:10.1145/329366.301116 fatcat:tq65ly5z7fhq5m4e24or2t2wty

Managing fairness and application performance with active queue management in docsis-based cable networks

James Martin, Gongbing Hong, James Westall
2014 Proceedings of the 2014 ACM SIGCOMM workshop on Capacity sharing workshop - CSWS '14  
Our focus is on fairness and application performance capabilities of CoDel and PIE, both are delay-based AQM schemes that have been proposed recently.  ...  The analysis presented in this paper provides timely feedback to the community concerning how recent delay-based AQM schemes are able to manage fairness and application performance in realistic, single  ...  CoDel's delay estimate is based on a per packet latency monitor. PIE's delay estimate is based on an estimate of the recent departure rate at the queue.  ... 
doi:10.1145/2630088.2630092 dblp:conf/sigcomm/MartinHW14 fatcat:xjhw3piujjadzosxvd4lj4fffm

MagPIe

Thilo Kielmann, Rutger F. H. Hofman, Henri E. Bal, Aske Plaat, Raoul A. F. Bhoedjang
1999 Proceedings of the seventh ACM SIGPLAN symposium on Principles and practice of parallel programming - PPoPP '99  
Every sender-receiver path used by an algorithm contains at most one wide area link.  ...  MAGPIE's algorithms send the minimal amount of data over the slow wide area links, and only incur a single wide area latency.  ...  The performance improvements of MAGPIE over MPICH are substantial, and depend on cluster topology, latency, and bandwidth.  ... 
doi:10.1145/301104.301116 dblp:conf/ppopp/KielmannHBPB99 fatcat:tpbalk3u2bai3h5ae4dln3cki4

On fairness and application performance of active queue management in broadband cable networks

Gongbing Hong, James Martin, James M. Westall
2015 Computer Networks  
Our results show that AQM maintains target queuing delays and consequently provide strong isolation between responsive high bandwidth and low bandwidth latency sensitive flows.  ...  We evaluate the performance of modern delay-based active queue management (AQM) algorithms in downstream DOCSIS 3.0 cable environments.  ...  Current practice tends to favor application performance over fairness.  ... 
doi:10.1016/j.comnet.2015.08.018 fatcat:iwb7ptel4jb2nh4bxhkek3afay

Adaptive Chunklets and AQM for Higher-Performance Content Streaming

Jonathan Kua, Grenville Armitage, Philip Branch, Jason But
2019 ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)  
MPEG recently developed Dynamic Adaptive Streaming over HTTP (DASH) as a unifying standard for HAS-based streaming.  ...  ABR algorithms in the presence of cross-traffic, especially in environments where Active Queue Management (AQM) schemes such as Proportional Integral controller Enhanced (PIE) and FlowQueue-Controlled Delay  ...  A recent experimental study showed that (standard, single-connection) DASH video streams benefit from PIE's higher burst tolerance and queuing delay targets when there is no cross-traffic.  ... 
doi:10.1145/3344381 fatcat:wvsc6xrd4vazjhdhgtb27bwpw4

Rapid Signalling of Queue Dynamics [article]

Bob Briscoe
2019 arXiv   pre-print
This is equivalent to scaling the sojourn time by the ratio of the arrival and departure rates averaged over the time spent in the queue.  ...  delay that the data itself experiences within the queue.  ...  Introduction Much attention has been paid to reducing the delay experienced on the data path through packet networks.  ... 
arXiv:1904.07044v1 fatcat:7mrhgjvfgffrxh4z7mpabhmbz4

Technologies for augmented reality systems

Andrei State, Mark A. Livingston, William F. Garrett, Gentaro Hirota, Mary C. Whitton, Etta D. Pisano, Henry Fuchs
1996 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques - SIGGRAPH '96  
We devised a hybrid tracking system which achieves improved registration of synthetic and real imagery and we improved on previous techniques for calibration of a magnetic tracker.  ...  IMPROVING REGISTRATION The breast biopsy task requires very high precision.  ...  Video Output We selected an MCO configuration that simultaneously transmits a 1280×1024 high-resolution image and two 640×480 VGA images. The high-resolution image is used for the user interface.  ... 
doi:10.1145/237170.237283 dblp:conf/siggraph/StateLGHWPF96 fatcat:6uao7diahrcuplpni7v67qoeyy

Sequential bargaining with common values

Paul Schweinzer
2010 Journal of Mathematical Economics  
The players are asymmetrically informed about the object's value and have veto power over any settlement.  ...  This presents a certain way for P1 to improve over his mixing payoffs granting him only o t−2 2 .  ...  The first set of results of the present paper requires that bids are strictly increasing over time. 6 This requirement for a party to (strictly) improve over previously made offers was introduced by Ståhl  ... 
doi:10.1016/j.jmateco.2009.09.001 fatcat:2gmw7fd4wba5thzdxmfurujl4y

Concentrated Ownership Revisited: The Idiosyncratic Value of Corporate Control

Zohar Goshen, Assaf Hamdani
2013 Social Science Research Network  
We, however, show that controllers may hold a control block to increase the pie's size (pursue idiosyncratic value) rather than dictate the pie's distribution (consume private benefits).  ...  Under conditions of asymmetric information, control over corporate decision-making allows entrepreneurs to pursue their business idea in whatever manner they see fit even against investors' objections.  ...  40 The reasons for a delay in executing a business idea could vary: unanticipated technological obstacles, unexpected delay in implementing organizational changes, inability to recruit high quality employees  ... 
doi:10.2139/ssrn.2228194 fatcat:noq457dd6zdqbcptfhnzb4i35i

Corporate social responsibility factors, environment and corporate sustainability: Specific overview of India and China

Peter Yao Lartey, School of Finance and Economics, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China, Junguo Shi, Santosh Rupa Jaladi, Steven Owusu Afriyie, 1. Institute of Industrial Economics, Jiangsu University, Zhenjiang 212012, China; 2. School of Finance and Economics, Jiangsu University, Zhenjiang 212012, China
2021 Frontiers in Management and Business  
And ideally, a firm's CSR performance is influenced by internal and external factors which are captured in stakeholder theory and institutional theory.  ...  The high performing countries and regions belong to Europe, the Latin America, North America, Asia and Africa.  ...  This new regulation has contributed to CSR performance and improved environmental policies in that that country.  ... 
doi:10.25082/fmb.2022.01.001 fatcat:3qkc6qfyr5cnbaerwih3arheuy

How Does Retirement Planning Software Handle Postretirement Realities? [chapter]

Anna M. Rappaport, John A. Turner
2010 Reorienting Retirement Risk Management  
This chapter explores retirement planning software that provides individuals and advisors the opportunity to perform a range of calculations to help them in retirement planning.  ...  Given the importance of longevity in financial planning, this is an area where programs could be improved.  ...  Retirement planning software offers individuals and advisors the opportunity to perform a range of calculations to help them in retirement planning.  ... 
doi:10.1093/acprof:oso/9780199592609.003.0004 fatcat:qcjvoznfirfyrazzk64nfzseuu
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