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296373 |
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04-Mar-2016 |
marius |
- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1 builds. - Update newvers.sh to reflect RC1. - Update __FreeBSD_version to reflect 10.3. - Update default pkg(8) configuration to use the quarterly branch.
Approved by: re (implicit) |
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293711 |
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11-Jan-2016 |
hiren |
MFC: r292011 MFC: r292012
Add an option to use rfc6675 based pipe/inflight bytes calculation in cubic and newreno.
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256281 |
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10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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220560 |
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12-Apr-2011 |
lstewart |
Use the full and proper company name for Swinburne University of Technology throughout the source tree.
Requested by: Grenville Armitage, Director of CAIA at Swinburne University of Technology MFC after: 3 days
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218167 |
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01-Feb-2011 |
lstewart |
Algorithm modules can define their own private congestion signal types in the top 8 bits of the 32 bit signal bit field space for internal use. These private signals should not be leaked outside of a module.
Given that many algorithm modules use the NewReno hook functions to simplify their implementation, the obvious place such a leak would show up is in the NewReno cong_signal hook function.
- Show the full number of significant bits in the signal type definitions in <netinet/cc.h>.
- Add a bitmask to simplify figuring out if a given signal is in the private or public bit range.
- Add a sanity check in newreno_cong_signal() to ensure private signals are not being leaked into the hook function.
Sponsored by: FreeBSD Foundation Discussed with: David Hayes <dahayes at swin edu au> MFC after: 1 week X-MFC with: r215166
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216107 |
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02-Dec-2010 |
lstewart |
General cleanup of the NewReno CC module (no functional changes):
- Remove superfluous includes and unhelpful comments.
- Alphabetically order functions.
- Make functions static.
Sponsored by: FreeBSD Foundation MFC after: 9 weeks X-MFC with: r215166
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216105 |
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02-Dec-2010 |
lstewart |
- Reinstantiate the after_idle hook call in tcp_output(), which got lost somewhere along the way due to mismerging r211464 in our development tree.
- Capture the essence of r211464 in NewReno's after_idle() hook. We don't use V_ss_fltsz/V_ss_fltsz_local yet which needs to be revisited.
Sponsored by: FreeBSD Foundation Submitted by: David Hayes <dahayes at swin edu au> MFC after: 9 weeks X-MFC with: r215166
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215166 |
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12-Nov-2010 |
lstewart |
This commit marks the first formal contribution of the "Five New TCP Congestion Control Algorithms for FreeBSD" FreeBSD Foundation funded project. More details about the project are available at: http://caia.swin.edu.au/freebsd/5cc/
- Add a KPI and supporting infrastructure to allow modular congestion control algorithms to be used in the net stack. Algorithms can maintain per-connection state if required, and connections maintain their own algorithm pointer, which allows different connections to concurrently use different algorithms. The TCP_CONGESTION socket option can be used with getsockopt()/setsockopt() to programmatically query or change the congestion control algorithm respectively from within an application at runtime.
- Integrate the framework with the TCP stack in as least intrusive a manner as possible. Care was also taken to develop the framework in a way that should allow integration with other congestion aware transport protocols (e.g. SCTP) in the future. The hope is that we will one day be able to share a single set of congestion control algorithm modules between all congestion aware transport protocols.
- Introduce a new congestion recovery (TF_CONGRECOVERY) state into the TCP stack and use it to decouple the meaning of recovery from a congestion event and recovery from packet loss (TF_FASTRECOVERY) a la RFC2581. ECN and delay based congestion control protocols don't generally need to recover from packet loss and need a different way to note a congestion recovery episode within the stack.
- Remove the net.inet.tcp.newreno sysctl, which simplifies some portions of code and ensures the stack always uses the appropriate mechanisms for recovering from packet loss during a congestion recovery episode.
- Extract the NewReno congestion control algorithm from the TCP stack and massage it into module form. NewReno is always built into the kernel and will remain the default algorithm for the forseeable future. Implementations of additional different algorithms will become available in the near future.
- Bump __FreeBSD_version to 900025 and note in UPDATING that rebuilding code that relies on the size of "struct tcpcb" is required.
Many thanks go to the Cisco University Research Program Fund at Community Foundation Silicon Valley and the FreeBSD Foundation. Their support of our work at the Centre for Advanced Internet Architectures, Swinburne University of Technology is greatly appreciated.
In collaboration with: David Hayes <dahayes at swin edu au> and Grenville Armitage <garmitage at swin edu au> Sponsored by: Cisco URP, FreeBSD Foundation Reviewed by: rpaulo Tested by: David Hayes (and many others over the years) MFC after: 3 months
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