| 1. |
- Habtegebreil, Haile, et al.
(author)
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Impact of TCP BBR on CUBIC traffic : a mixed workload evaluation
- 2018
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Conference paper (peer-reviewed)abstract
- A recently proposed congestion control algorithm (CCA) called BBR (Bottleneck Bandwidth and Round-trip propagation time) has shown a lot of promise in avoiding some of the problems that have plagued loss-based CCAs. Nevertheless, deployment of a new alternative algorithm requires a thorough evaluation of the effect of the proposed alternative on established transport protocols like TCP CUBIC. Furthermore, evaluations that consider the heterogeneity of Internet traffic sizes would provide a useful insight into the deployability of an algorithm that introduces sweeping changes across multiple algorithm components. Yet, most evaluations of BBR’s impact and competitive fairness have focused on the steady-state performance of large flows. This work expands on previous studies of BBR by evaluating BBR’s impact when the traffic consists of flows of different sizes. Our experiments show that under certain circumstances BBR’s startup phase can result in a significant reduction of the throughput of competing large CUBIC flows and the utilization of the bottleneck link. In addition, the steady-state operation of BBR can have negative impact on the performance of bursty flows using loss-based CCAs over bottlenecks with buffer sizes as high as two times the bandwidth-delay product.
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| 2. |
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| 3. |
- Hurtig, Per, 1980-, et al.
(author)
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Impact of TCP BBR on CUBIC Traffic : A mixed workload evaluation
- 2018
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In: Proceedings of the 30th International Teletraffic Congress, ITC 2018. - : IEEE. - 9780988304550 ; , s. 218-226
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Conference paper (peer-reviewed)abstract
- A recently proposed congestion control algorithm (CCA) called BBR (Bottleneck Bandwidth and Round-trip propagation time) has shown a lot of promise in avoiding some of the problems that have plagued loss-based CCAs. Nevertheless, deployment of a new alternative algorithm requires a thorough evaluation of the effect of the proposed alternative on established transport protocols like TCP CUBIC. Furthermore, evaluations that consider the heterogeneity of Internet traffic sizes would provide a useful insight into the deployability of an algorithm that introduces sweeping changes across multiple algorithm components. Yet, most evaluations of BBR's impact and competitive fairness have focused on the steady-state performance of large flows. This work expands on previous studies of BBR by evaluating BBR's impact when the traffic consists of flows of different sizes. Our experiments show that under certain circumstances BBR's startup phase can result in a significant reduction of the throughput of competing large CUBIC flows and the utilization of the bottleneck link. In addition, the steady-state operation of BBR can have negative impact on the performance of bursty flows using loss-based CCAs over bottlenecks with buffer sizes as high as two times the bandwidth-delay product.
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| 4. |
- Tagesson, Torbjörn, 1969-, et al.
(author)
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Local government auditing in Sweden
- 2022. - 1
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In: Auditing practices in local governments: an international comparison. - Bingley, UK : Emerald Group Publishing Limited. - 9781801170864 - 9781801170857 - 9781801170871 ; , s. 131-137
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Book chapter (other academic/artistic)abstract
- Swedish local government audit has remained stable for a number of years. Political auditors are appointed to assess each local council’s work by the local council. They are assisted by professional auditors – however there is little standardisation of what audit means. The local council has considerable control over what the professional auditors do, setting out how they should be regulated, how they should be funded and what should happen in the aftermath of their reports. While the system has remained stable for a number of years, there are criticisms of how far the system advances local political accountability.
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| 5. |
- Tagesson, Torbjörn, 1969-, et al.
(author)
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Tillämning av normgivning måste alltid beakta lagstiftning
- 2015
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In: Balans. - Far. - 0346-8208. ; :4, s. 34-34
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Review (pop. science, debate, etc.)abstract
- Förslaget om hur ett nyttjandevärde ska beräknas för en tillgång i ett kommunalt bolag som lyder under självkostnadsprincipen är principiellt intressant. Det skriver Torbjörn Tagesson, Per-Åke Brunström och Mikael Sjölander i en kommentar till artikeln ”Nedskrivningar i kommunala bolag vid tillämpning av K3”, i Balans Fördjupning nr 2/2015.
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