To break a potential read/write deadlock, gossipsub uses an unbounded
queue for writes - when peers are too slow to process this queue, it may
end up growing without bounds causing high memory usage.
Here, we introduce a maximum write queue length after which the peer is
disconnected - the queue is generous enough that any "normal" usage
should be fine - writes that are `await`:ed are not affected, only
writes that are launched in an `asyncSpawn` task or similar.
* avoid unnecessary copy of message when there are no send observers
* release message memory earlier in gossipsub
* simplify pubsubpeer logging
* add helper to read EOF marker after closing stream (else stream stay
alive until timeout/reset)
* don't assert on empty channel message
* don't loop when writing to chronos (no need)
* channel close race and deadlock fixes
* remove send lock, write chunks in one go
* push some of half-closed implementation to BufferStream
* fix some hangs where LPChannel readers and writers would not always
wake up
* simplify lazy channels
* fix close happening more than once in some orderings
* reenable connection tracking tests
* close channels first on mplex close such that consumers can read bytes
A notable difference is that BufferedStream is no longer considered EOF
until someone has actually read the EOF marker.
* docs, simplification
* remove almost-empty types module
* lock when writing message (that's the only place the lock matters, and
only when the message is > max msg size)
* logging updates (log in consistent order, makes reading logs easier)
* raise EOF from readExactly only if no bytes have been read (to signal
that _no_ bytes were lost)
This change modifies how the backpressure algorithm in bufferstream
works - in particular, instead of working byte-by-byte, it will now work
seq-by-seq.
When data arrives, it usually does so in packets - in the current
bufferstream, the packet is read then split into bytes which are fed one
by one to the bufferstream. On the reading side, the bytes are popped of
the bufferstream, again byte by byte, to satisfy `readOnce` requests -
this introduces a lot of synchronization traffic because the checks for
full buffer and for async event handling must be done for every byte.
In this PR, a queue of length 1 is used instead - this means there will
at most exist one "packet" in `pushTo`, one in the queue and one in the
slush buffer that is used to store incomplete reads.
* avoid byte-by-byte copy to buffer, with synchronization in-between
* reuse AsyncQueue synchronization logic instead of rolling own
* avoid writeHandler callback - implement `write` method instead
* simplify EOF signalling by only setting EOF flag in queue reader (and
reset)
* remove BufferStream pipes (unused)
* fixes drainBuffer deadlock when drain is called from within read loop
and thus blocks draining
* fix lpchannel init order
* move pubsub of off switch, pass switch into pubsub
* use join on lpstreams
* properly cleanup up failed peers
* fix tests
* fix peertable hasPeerId
* fix tests
* rework sending, remove helpers from pubsubpeer, unify in broadcast
* further split broadcast into send
* use send where appropriate
* use formatIt
* improve trace
Co-authored-by: Giovanni Petrantoni <giovanni@fragcolor.xyz>
* add finegrained timeouts to pubsub
* use 10 millis timeout in tests
* finalization
* revert timeouts
* use `atEof` for reads
* adjust timeouts and use atEof for reads
* use atEof for reads
* set isEof flag
* no backoff for pubsub streams
* temp timer increase, make macos finalize
* don't call `subscribePeer` in libp2p anymore
* more traces
* leak tests
* lower timeouts
* handle exceptions in control message
* don't use `cancelAndWait`
* handle exceptions in helpers
* wip
* don't send empty messages
* check for leaks properly
* don't use cancelAndWait
* don't await subscribption sends
* remove subscrivePeer calls from switch
* trying without the hooks again
* add support for channel timeouts
* tests for channel timeout
* add timeouts to standard switch
* fix mplex init
* cleanup timer on stream close
* add comment for `isConnected`
* move cleanup event
* consolidate reading in lpstream
* remove debug echo
* throw if not enough bytes where read
* tune log level
* set eof flag
* test readExactly to fail on not enough bytes
* count published messages
* don't call `switch.dial` in `subscribeToPeer`
* add secureconn constructor
* close in the correct order
* concurent dial lock and track in/out conns better
* make tests pass
* add todo comment
* disconect peers that open too many connections
* wip
* do connection and muxer tracking in one place
* prevent nil pointer in observers
* drop connections when peers is over max
* prevent channel leaks
* don't use closure to handle channel
* count published messages
* don't call `switch.dial` in `subscribeToPeer`
* don't use delegation in connection
* move connection out to own file
* don't breakout on reset
* make sure to call close on secured conn
* add lpstream tracing
* don't breackdown by conn id
* fix import
* remove unused lable
* reset connection on exception
* add additional metrics for skipped messages
* check for nil in secure.close
* call write until all is written out
* add comments to lpchannel fields
* add an eof flag to signal which end closed
* wip: rework with proper half-closed
* add eof and closed handling
* propagate closes to piped
* call parent close
* moving bufferstream trackers out
* move writeLock to bufferstream
* move writeLock out
* remove unused call
* wip
* rebasing master
* fix mplex tests
* wip
* fix bufferstream after backport
* wip
* rename to differentiate from chronos tracker
* close connection on chronos close
* make reset request asyncCheck
* fix channel cleanup
* misc
* don't use read
* fix backports
* make noise work again
* proper exception handling
* don't reraise just yet
* add convenience templates
* dont double wrap
* use async pragma
* fixes after backporting
* muxer owns connection
* remove on transport close cleanup
* revert back allread
* adding some todos
* read from stream
* inc count before closing
* rebasing master
* rebase master
* use correct exception type
* use try/finally insted of defer
* fix compile in trace mode
* reset channels on mplex close
* make async for proper exception handling
* tryAndWarn msg messes up Exception msg
* misc: comment out tracker dumps
* cleanup mplex tests
* more informative errors
* give CI time to run
* revert change, bacause it causes races
Jacek Sieka
Giovanni Petrantoni
Eugene Kabanov
Dmitriy Ryajov
Ștefan Talpalaru
Viktor Kirilov
Giovanni Petrantoni