Commit graph

8 commits

Author SHA1 Message Date
Dmitri Tikhonov
4d83f5bd45 Release 1.17.15
- [BUGFIX] http_client: make sure only one read per on_read() callback
  is performed in the header conversion bypass (-B) mode.
- http_client: with -E, assign random priority when stream is created.
- [OPTIMIZATION] On immediate write, place an ACK frame into the first
  buffered packet if an ACK is queued.  This reduces the number of
  standalone ACK packets.
- [OPTIMIZATION] Allow placing more than one STREAM frame from the same
  stream into an outgoing packet.  This change minimizes the number of
  buffered packets required to store several small HTTP messages by
  virtue of allowing more than one STREAM frame from HEADERS stream in
  the same packet.
- [OPTIMIZATION] Flush headers when writing to buffered packets.  This
  causes the headers to be written to the same buffered packet queue,
  thereby improving packet utilization, especially for small HTTP
  messages.
2019-01-21 09:07:02 -05:00
Dmitri Tikhonov
229fce07a3 Release 1.17.11
Fix strict aliasing warning in when compiling with optimizations
2019-01-03 11:48:45 -05:00
Dmitri Tikhonov
1e75f9380e Release 1.17.0
- [API Change] Packet out Memory Interface (PMI) update:
  - Split PMI pool return into pmi_release and pmi_return
  - PMI callbacks take peer_ctx and is_ipv6 arguments
- [BUGFIX] Fix use-after-free when certificate is updated
- Silence gcc warning in optimized mode by performing useless
  initialization
- cmake: use the standard variable CMAKE_BUILD_TYPE instead of
  DEVEL_MODE
2018-10-16 09:03:33 -04:00
Dmitri Tikhonov
10c492f0b6 Update copyright year; add CONTRIBUTORS.txt 2018-04-02 15:17:56 -04:00
Amol Deshpande
461e84d874 compiles in debug/release. tests pass (in debug config at least) 2018-03-12 15:25:01 -07:00
Dmitri Tikhonov
bfc7bfd842 Latest changes
- [API Change] lsquic_engine_connect() returns pointer to the connection
  object.
- [API Change] Add lsquic_conn_get_engine() to get engine object from
  connection object.
- [API Change] Add lsquic_conn_status() to query connection status.
- [API Change] Add add lsquic_conn_set_ctx().
- [API Change] Add new timestamp format, e.g. 2017-03-21 13:43:46.671345
- [OPTIMIZATION] Process handshake STREAM frames as soon as packet
  arrives.
- [OPTIMIZATION] Do not compile expensive send controller sanity check
  by default.
- [OPTIMIZATION] Add fast path to gquic_be_gen_reg_pkt_header.
- [OPTIMIZATION] Only make squeeze function call if necessary.
- [OPTIMIZATION] Speed up Q039 ACK frame parsing.
- [OPTIMIZATION] Fit most used elements of packet_out into first 64 bytes.
- [OPTIMIZATION] Keep track of scheduled bytes instead of calculating.
- [OPTIMIZATION] Prefetch next unacked packet when processing ACK.
- [OPTIMIZATION] Leverage fact that ACK ranges and unacked list are.
  ordered.
- [OPTIMIZATION] Reduce function pointer use for STREAM frame generation
- Fix: reset incoming streams that arrive after we send GOAWAY.
- Fix: delay client on_new_conn() call until connection is fully set up.
- Fixes to buffered packets logic: splitting, STREAM frame elision.
- Fix: do not dispatch on_write callback if no packets are available.
- Fix WINDOW_UPDATE send and resend logic.
- Fix STREAM frame extension code.
- Fix: Drop unflushed data when stream is reset.
- Switch to tracking CWND using bytes rather than packets.
- Fix TCP friendly adjustment in cubic.
- Fix: do not generate invalid STOP_WAITING frames during high packet
  loss.
- Pacer fixes.
2018-02-26 16:01:16 -05:00
Dmitri Tikhonov
c51ce3387f Latest changes
- [API Change] Sendfile-like functionality is gone.  The stream no
  longer opens files and deals with file descriptors.  (Among other
  things, this makes the code more portable.)  Three writing functions
  are provided:

    lsquic_stream_write
    lsquic_stream_writev
    lsquic_stream_writef    (NEW)

  lsquic_stream_writef() is given an abstract reader that has function
  pointers for size() and read() functions which the user can implement.
  This is the most flexible way.  lsquic_stream_write() and
  lsquic_stream_writev() are now both implemented as wrappers around
  lsquic_stream_writef().

- [OPTIMIZATION] When writing to stream, be it within or without the
  on_write() callback, place data directly into packet buffer,
  bypassing auxiliary data structures.  This reduces amount of memory
  required, for the amount of data that can be written is limited
  by the congestion window.

  To support writes outside the on_write() callback, we keep N
  outgoing packet buffers per connection which can be written to
  by any stream.  One half of these are reserved for the highest
  priority stream(s), the other half for all other streams.  This way,
  low-priority streams cannot write instead of high-priority streams
  and, on the other hand, low-priority streams get a chance to send
  their packets out.

  The algorithm is as follows:

  - When user writes to stream outside of the callback:
    - If this is the highest priority stream, place it onto the
      reserved N/2 queue or fail.
        (The actual size of this queue is dynamic -- MAX(N/2, CWND) --
         rather than N/2, allowing high-priority streams to write as
         much as can be sent.)
    - If the stream is not the highest priority, try to place the
      data onto the reserved N/2 queue or fail.
  - When tick occurs *and* more packets can be scheduled:
    - Transfer packets from the high N/2 queue to the scheduled
      queue.
    - If more scheduling is allowed:
      - Call on_write callbacks for highest-priority streams,
        placing resulting packets directly onto the scheduled queue.
    - If more scheduling is allowed:
      - Transfer packets from the low N/2 queue to the scheduled
        queue.
    - If more scheduling is allowed:
      - Call on_write callbacks for non-highest-priority streams,
        placing resulting packets directly onto the scheduled queue

  The number N is currently 20, but it could be varied based on
  resource usage.

- If stream is created due to incoming headers, make headers readable
  from on_new.

- Outgoing packets are no longer marked non-writeable to prevent placing
  more than one STREAM frame from the same stream into a single packet.
  This property is maintained via code flow and an explicit check.
  Packets for stream data are allocated using a special function.

- STREAM frame elision is cheaper, as we only perform it if a reset
  stream has outgoing packets referencing it.

- lsquic_packet_out_t is smaller, as stream_rec elements are now
  inside a union.
2017-10-31 09:35:58 -04:00
Dmitri Tikhonov
50aadb33c7 LSQUIC Client: Initial release 2017-09-22 17:00:03 -04:00