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Change-Id: If6f4d6404753b2d6b96e17f5414079bcdb9edde8
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Allows app to push data. Additionally, ensure reset/close replies are
not sent unless vcl closes the session.
Change-Id: Icbbf933cf57b55cfbcc7b802af0f83919a066f65
Signed-off-by: Florin Coras <fcoras@cisco.com>
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In addition to that, a bit of refactoring.
Change-Id: Iea1eabc2167bcdef185ec53bc09bae087c5398e6
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: If538bb9d6fb489906099b727a7bfdb9d9af29402
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ia2241e963cf45765d8d17c65eea781edbf74d4f9
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ie4cb08f5d9f7fd025f1a8ae610cebb0b0c315d9f
Signed-off-by: Florin Coras <fcoras@cisco.com>
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syn/fin are no longer added to seq_end so they must be considered
individually in each state.
Change-Id: I5e3047194101c4fca2db9f9ad29a4a6468c397ab
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I90056176194cb2a144d49a3cb283653d8d30f051
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Also add the closed-waiting session state wherein the session still
allows the transport to send oustanding data.
Change-Id: Ic47807379906ef2010934381ff0b9e53c7e631d8
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I1f42644f143bb65ee764c0f869b402595126adac
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Iba7c08c9edcf76ea24d00d5ea9e0586e9f94df4e
Signed-off-by: Florin Coras <fcoras@cisco.com>
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This mostly adds explicit drops or resets for state and flag
combinations that would've been otherwise dropped with a warning
message.
It also adds some valid RST handlers.
Change-Id: Ib0d19a0939fe275befeb29cf072b87b1a79937ce
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Disconnect transport even if tx fifo is not empty and have transport
deal with the problem. In case of tcp, add timer to fin_wait_1. If it
expires and we're still in established state, cleanup but only after
waiting for session tx events to cleanup.
Change-Id: I45759a3c43dd096bb2c03daf5372416c30678d62
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Also cleanup session table when transport closes and app didn't reply to
the close notification.
Change-Id: Ie3d518e3afff73437561561b46dbf695c24632ad
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: If109d6772cbd58f4f2a56ae7ec593639d1fa1b96
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ia8b2a077ba4897ddd15cf33221b191cd7a3f1d33
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I945d1644a23b6a3d50c9beaffc732d2b6facd974
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I529c34235ad2b0e4c730959bb1b8c9d50a83738c
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I7219a8d315b312812acafd9d2709fba8b4a2a679
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ifc0584d781efc30904069ea17c0afbb68c49c442
Signed-off-by: Florin Coras <fcoras@cisco.com>
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For tcp this means that the last enqueued data goes out with a psh bit
set.
Change-Id: I29d357ecae6f02e748b59a7b799150ec73d14ba2
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ic6a6202a2d5aca33eee7fc6ff8eeaa1db9b58525
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I5a5ee48755befc370a1f89ddbb0d91f164ed564f
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I6debfe85d9d55f6f9a8ef0ce1dcc008393847a37
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Iff75be238a231df88a37b61610c134e4a4770708
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I45fd7538853f84c6c8bf804cc20acbc9601db3ba
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Id4f37f5d4a03160572954a416efa1ef9b3d79ad1
Signed-off-by: Dave Barach <dave@barachs.net>
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Make sure that we notify the app of the data enqueued in the burst
before notifying of disconnect.
Change-Id: I7747a5cbb4c6bc9132007f849c24ce04b7841273
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Because the code is not optimized, newreno is still the default
congestion control algorithm.
Change-Id: I7061cc80c5a75fa8e8265901fae4ea2888e35173
Signed-off-by: Florin Coras <fcoras@cisco.com>
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- update pacer once per burst
- better estimate initial rtt
- compute smoothed average for higher precision rtt estimate
Change-Id: I06d41a98784cdf861bedfbee2e7d0afc0d0154ef
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Instead of reusing buffers for acking, consume all buffers and program
output for (dup)ack generation. This implicitly fixes the drop counters
that were artificially inflated by both data and feedback traffic.
Moreover, the patch also significantly reduces the ack traffic as we now
only generate an ack per frame, unless duplicate acks need to be sent.
Because of the reduced feedback traffic, a sender's rx path and a
receiver's tx path are now significantly less loaded. In particular, a
sender can overwhelm a 40Gbps NIC and generate tx drop bursts for low
rtts. Consequently, tx pacing is now enforced by default.
Change-Id: I619c29a8945bf26c093f8f9e197e3c6d5d43868e
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Avoid dequeuing acked bytes more than once per burst for a connection.
Although the fifos do not use locks, size decrements are atomic, so they
rely on locked instructions.
Change-Id: Id65f4ea40b2c10057461402dfd0393034e6472d5
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Allows sending of unsent data in fast recovery and consolidates logic in
tcp, instead of splitting it between tcp fast retransmit and tcp output
path called by the session layer.
Change-Id: I9b12cdf2aa2ac50b9f25e46856fed037163501fe
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ib15d629c5fde7849bfa3307f42659e920eb0f463
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Also reset pacer on tcp retransmit timeout
Change-Id: I5a9edee4c00d1d169248d79587a9b10437c2bd87
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Also propagate tcp worker context instead of retrieving it multiple
times.
Change-Id: I7b273b981826b37783566d0172a64cd6957f3b33
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Force pacing for fast retransmit to avoid bursts of retransmitted
packets.
Change-Id: I2ff42c328899b36322c4de557b1f7d853dba8fe2
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Adds tx pacing infrastructure for transport protocols that want to use
it. Particularly useful for connections with non-negligible rtt and
constrained network throughput as it avoids large tx bursts that lead to
local interface tx or network drops.
By default the pacer is disabled. To enabled it for tcp, add tx-pacing
to tcp's startup conf. We are still slightly inefficient in the handling
of incoming packets in established state so the pacer slightly affect
maximum throughput in low lacency scenarios.
Change-Id: Id445b2ffcd64cce015f75b773f7d722faa0f7ca9
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Patch is too large to be ported to 18.10 just days before release.
- handle fast retransmits outside of established node and limit the
retransmit burst size to avoid tx losses and worsening congestion.
- in the absance of a tx pacer, use slow start after fast retransmit
exists
- add fast retransmit heuristic that re-retries sending the first
segment if everything else fails
- fine tuning
Change-Id: I84a2ab8fbba8b97f1d2b26584dc11a1e2c33c8d2
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab
Signed-off-by: Dave Barach <dave@barachs.net>
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Change-Id: I3ac136e2a10796d8fa86ddb6f0d6cabe5fa749f8
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ie46b3a81de4ed39b7b40e3879436f7e5a2908d98
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I0bc4062c1fd3202ee201acb36a2bb14fc6ee1543
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: If81ee34e1f1e929de1a5b758ddb9aede4002e858
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I0c9c055fcc3d681c4032228a90cc81f484e200f0
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Idf83fce8ca176e57b323e3741034e3223f1d195a
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I49da8be88dd033aae1b190e8e2163069ef480442
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: Ibe57abc7d2a06be80146ce28edf4c60ecda991eb
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I89e8052f2d2c36dd3de5255c4ee570722dc58227
Signed-off-by: Florin Coras <fcoras@cisco.com>
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Change-Id: I00a0d7f57dc144d338d5ad45b0a6e3720c32c400
Signed-off-by: Florin Coras <fcoras@cisco.com>
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