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path: root/src/vnet/tcp/tcp_output.c
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2018-11-26Minor tweaksDave Barach1-10/+11
Significant refit coming soon. Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: If7d196e84354c5088706e2ac81e2add42597a550
2018-11-14Remove c-11 memcpy checks from perf-critical codeDave Barach1-13/+14
Change-Id: Id4f37f5d4a03160572954a416efa1ef9b3d79ad1 Signed-off-by: Dave Barach <dave@barachs.net>
2018-11-12tcp: handle disconnects after enq notificationsFlorin Coras1-2/+1
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>
2018-11-09tcp: basic cubic implementationFlorin Coras1-1/+1
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>
2018-11-08tcp: pacer and mrtt estimation improvementsFlorin Coras1-1/+1
- 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>
2018-11-07tcp: consume incoming buffers instead of reusingFlorin Coras1-28/+67
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>
2018-11-06tcp: dequeue acked only once per burstFlorin Coras1-2/+2
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>
2018-11-05tcp: send unsent data in fast recoveryFlorin Coras1-75/+156
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>
2018-11-02tcp: coverity fixesFlorin Coras1-1/+1
Change-Id: Ib15d629c5fde7849bfa3307f42659e920eb0f463 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-02session: measure dispatch period only if under loadFlorin Coras1-1/+1
Also reset pacer on tcp retransmit timeout Change-Id: I5a9edee4c00d1d169248d79587a9b10437c2bd87 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-02tcp: minimize use of tlsFlorin Coras1-140/+131
Also propagate tcp worker context instead of retrieving it multiple times. Change-Id: I7b273b981826b37783566d0172a64cd6957f3b33 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-01tcp: fast retransmit pacingFlorin Coras1-3/+7
Force pacing for fast retransmit to avoid bursts of retransmitted packets. Change-Id: I2ff42c328899b36322c4de557b1f7d853dba8fe2 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-10-25tcp/session: add tx pacerFlorin Coras1-1/+1
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>
2018-10-23tcp: fast retransmit improvementsFlorin Coras1-21/+57
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>
2018-10-23c11 safe string handling supportDave Barach1-2/+2
Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab Signed-off-by: Dave Barach <dave@barachs.net>
2018-10-17tcp: fix multiple fin retries (VPP-1461)Florin Coras1-9/+9
Change-Id: I1be7c59df7b48875f81ebeebf5f39ed15a43d2d8 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-10-16tls: fix multi threaded medium scale test (VPP-1457)Florin Coras1-1/+9
- ensure session enqueue epoch does not wrap between two enqueues - use 3 states for echo clients app, to distinguish between starting and closing phases - force tcp fin retransmit if out of buffers while sending a fin Change-Id: I6f2cab46affd1148aba2a33fb6d58bcc54f32805 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-09-25tcp: add option to cfg max rx fifo sizeFlorin Coras1-1/+2
Change-Id: Icff3d688506e7658330db004c58bcfcac273fcec Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-08-24tcp: fix cc recovery re-entry and persist timer popFlorin Coras1-9/+22
Change-Id: I89e8052f2d2c36dd3de5255c4ee570722dc58227 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-03tcp: update snd_una_max for retranmsitsFlorin Coras1-0/+4
Change-Id: I0573d0aff39581bba96e610228a10ae923a8ca06 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-30tcp: fix single loop prefetchFlorin Coras1-2/+2
Also add single loop prefetch in session tx Change-Id: Ib2725a2552fcc1a65050d7a2eb10491a7b34db62 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-26tcp/session: tx optimizationsFlorin Coras1-19/+48
- cache and reuse tcp options and rcv_wnd for session layer tx bursts - avoid reading/setting total_length_not_including_first_buffer. It's part of a buffer's second cache line so it comes at a "cost". Change-Id: Id18219c2f7e07cf4c63ee74f9cdd9e5918904036 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-26tcp: cleanup functionsFlorin Coras1-68/+67
- sprinkle statics for functions - move some inlines from header files to corresponding .c files - replace some always_inlines with statics where inlining is not performance critical Change-Id: I371dbf63431ce7e27e4ebbbdd844a9546a1f1849 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-20tcp: add per worker ctx structureFlorin Coras1-21/+24
Change-Id: I28d3c31bdc4255a4ca223d80bcf44709fb39f4ed Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-19tcp: optimize tcp outputFlorin Coras1-162/+158
Change-Id: Idf17a0633a1618b12c22b1119e40c2e9d3192df9 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-12tcp: add close-wait state flagsFlorin Coras1-0/+1
Change-Id: I35508d5251633396393f52842d1b58bc1c1463f6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-11tcp: cleanup connection/session fixesFlorin Coras1-2/+3
- Cleanup session state after last ack and avoid using a cleanup timer. - Change session cleanup to free the session as opposed to waiting for delete notify. - When in close-wait, postpone sending the fin on close until all outstanding data has been sent. - Don't flush rx fifo unless in closed state Change-Id: Ic2a4f0d5568b65c83f4b55b6c469a7b24b947f39 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-10tcp: fix timer based recovery exit conditionFlorin Coras1-1/+2
Change-Id: I3f36e5760fd2935cc29d22601d4c0a1d2a22ba84 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-26tcp: loss recovery improvements/fixesFlorin Coras1-11/+15
- fix newreno cwnd computation - reset snd_una_max on entering recovery - accept acks beyond snd_nxt but less than snd_congestion when in recovery - avoid entering fast recovery multiple times when using sacks - avoid as much as possible sending small segments when doing fast retransmit - more event logging Change-Id: I19dd151d7704e39d4eae06de3a26f5e124875366 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-23tcp: cc improvements and fixesFlorin Coras1-5/+7
Change-Id: I6615bb612bcc3f795b5f822ea55209bb30ef35b5 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-21tcp: unlock link-local adjacencies on connection cleanupFlorin Coras1-24/+9
Change-Id: I37705fb572045f42be4c2dabbd8460c8f8872167 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-18session: add session process nodeFlorin Coras1-0/+2
Add a session process node that handles main thread tx and retransmit in order to avoid having a polling input node. Change-Id: I3357e987c023a84b533b32793e37ab4204420f64 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-17tcp: handle link-local addressesFlorin Coras1-6/+61
Change-Id: I9ede6bc861350c7d9e78fa4d96cd584c2816d06f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-10tcp: fix jumbo retransmitsFlorin Coras1-42/+42
Change-Id: I1c8a14d4d51aa730f0edcf491e3c4725e2d8bd66 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-04-20tcp: improve statsFlorin Coras1-0/+6
Change-Id: I9ab11ba9f958c679112eb22c8db39cb269a29dc7 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-29tcp: fix fib index buffer taggingFlorin Coras1-13/+17
Change-Id: I373cc252df3621d44879b8eca70aed17d7752a2a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-23tcp/session: sprinkle prefetchesFlorin Coras1-0/+8
Change-Id: Idef3c665580c13d72e99f43d16b8b13cc6ab746f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-02session: first approximation implementation of tlsFlorin Coras1-1/+1
It consists of two main parts. First, add an application transport type whereby applications can offer transport to other applications. For instance, a tls app can offer transport services to other applications. And second, a tls transport app that leverages the mbedtls library for tls protocol implementation. Change-Id: I616996c6e6539a9e2368fab8a1ac874d7c5d9838 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-02-07Refactor vlib_buffer flagsDamjan Marion1-2/+2
Change-Id: I853386aebfe488ebb10328435b81b6e3403c5dd0 Signed-off-by: Damjan Marion <damarion@cisco.com>
2018-02-01tcp: tcp_output.c failed to compile when VLIB_BUFFER_TRACE_TRAJECTORY is enabledSteven1-1/+1
Fixed a typo in tcp_push_header(). The typo only kicks in when the macro VLIB_BUFFER_TRACE_TRAJECTORY is enabled. Change-Id: I62832a4932ec5b14e3063d5eac113780851aae59 Signed-off-by: Steven <sluong@cisco.com>
2017-12-11session: generalize handling of network transportsFlorin Coras1-0/+1
- compute session type out of transport and network protos - make session, session lookup and session queue code network protocol agnostic This does not update the session layer to support non-ip network layer protocols Change-Id: Ifc2f92845e158b649d59462eb7d51c12af536691 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-29session: fix preallocation of local endpoint tableFlorin Coras1-3/+1
Change-Id: I67a73e31bda9e497859297fcc1765e880572884a Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-28tcp: fix retransmissions under buffer shortageFlorin Coras1-28/+28
- add debugging scaffolding for simulating buffer shortage Change-Id: Ice519d74f9c4e4094c4586c548185135b7bb5f2d Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-10session: add support for application namespacingFlorin Coras1-2/+1
Applications are now provided the option to select the namespace they are to be attached to and the scope of their attachement. Application namespaces are meant to: 1) constrain the scope of communication through the network by association with source interfaces and/or fib tables that provide the source ips to be used and limit the scope of routing 2) provide a namespace local scope to session layer communication, as opposed to the global scope provided by 1). That is, sessions can be established without assistance from transport and network layers. Albeit, zero/local-host ip addresses must still be provided in session establishment messages due to existing application idiosyncrasies. This mode of communication uses shared-memory fifos (cut-through sessions) exclusively. If applications request no namespace, they are assigned to the default one, which at its turn uses the default fib. Applications can request access to both local and global scopes for a namespace. If no scope is specified, session layer defaults to the global one. When a sw_if_index is provided for a namespace, zero-ip (INADDR_ANY) binds are converted to binds to the requested interface. Change-Id: Ia0f660bbf7eec7f89673f75b4821fc7c3d58e3d1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-04[aarch64] Fixes CLI crashes on dpaa2 platform.Christophe Fontaine1-1/+1
- always use 'va_args' as pointer in all format_* functions - u32 for all 'indent' params as it's declaration was inconsistent Change-Id: Ic5799309a6b104c9b50fec309cba789c8da99e79 Signed-off-by: Christophe Fontaine <christophe.fontaine@enea.com>
2017-10-03tcp: updates to connection closing procedure (VPP-996)Florin Coras1-2/+13
- add separate TIME_WAIT time constant - fix output node for TIME_WAIT acks - ensure snd_nxt is snd_una_max after retransmitting fin - debugging improvements Change-Id: Ic947153346979853f2526824b229126e47aead86 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-26tcp: update snd_nxt after congestion recoveryFlorin Coras1-9/+5
Change-Id: I2cf4c4850b9c3c093a7dce0cec89b9f710f69393 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-25tcp: do not sample rtt for retransmitted segmentsFlorin Coras1-2/+19
Change-Id: I365c31607332a944ef498369881332b515894ed7 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-19session/tcp: improve preallocated segment handlingFlorin Coras1-18/+73
- add preallocated segment flag - don't remove pre-allocated segments except if application detaches - when preallocating fifos in multiple segments, completely fill a segment before moving to the next - detach server application from segment-managers when deleting app - batch syn/syn-ack/fin (re)transmissions - loosen up close-wait and time-wait times Change-Id: I412f53ce601cc83b3acc26aeffd7fa2d52d73b03 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-15dpdk: cli to check for buffer leakageFlorin Coras1-4/+6
Use buffer pre_data and existing buffer trace trajectory code to find out dpdk buffer leakages. Change-Id: I26a5d8bd2f23d01cb6070ffc3ddcc6d3d863b575 Signed-off-by: Florin Coras <fcoras@cisco.com>