Commit graph

541 commits

Author SHA1 Message Date
Roman Khimov
dce9f80585
Merge pull request #2743 from nspcc-dev/log-fan-out
Logarithmic gossip fan out
2022-10-14 23:18:34 +07:00
Roman Khimov
65f0fadddb network: register peer only if it's not a duplicate 2022-10-14 15:53:32 +03:00
Roman Khimov
851cbc7dab network: implement adaptive peer requests
When the network is big enough, MinPeers may be suboptimal for good network
connectivity, but if we know the network size we can do some estimation on the
number of sufficient peers.
2022-10-14 15:53:32 +03:00
Roman Khimov
c17b2afab5 network: add BroadcastFactor to control gossip, fix #2678 2022-10-14 15:53:32 +03:00
Roman Khimov
215e8704f1 network: simplify discoverer, make it almost a lib
We already have two basic lists: connected and unconnected nodes, we don't
need an additional channel and we don't need a goroutine to handle it.
2022-10-14 15:53:32 +03:00
Roman Khimov
c1ef326183 network: re-add addresses to the pool on UnregisterConnectedAddr
That's what we do anyway, but this way we can be a bit more efficient.
2022-10-14 14:12:33 +03:00
Roman Khimov
631f166709 network: broadcast to log-dependent number of nodes
Fixes #608.
2022-10-14 14:12:33 +03:00
Roman Khimov
dc62046019 network: add network size estimation metric 2022-10-12 22:29:55 +03:00
Roman Khimov
bcf77c3c42 network: filter out not-yet-ready nodes when broadcasting
They can fail right in the getPeers or they can fail later when packet send
is attempted. Of course they can complete handshake in-between these events,
but most likely they won't and we'll waste more resources on this attempt. So
rule out bad peers immediately.
2022-10-12 16:51:01 +03:00
Roman Khimov
137f2cb192 network: deduplicate TCPPeer code a bit
context.Background() is never canceled and has no deadline, so we can avoid
duplicating some code.
2022-10-12 15:43:31 +03:00
Roman Khimov
104da8caff network: broadcast messages, enqueue packets
Drop EnqueueP2PPacket, replace EnqueueHPPacket with EnqueueHPMessage. We use
Enqueue* when we have a specific per-peer message, it makes zero sense
duplicating serialization code for it (unlike Broadcast*).
2022-10-12 15:39:20 +03:00
Roman Khimov
d5f2ad86a1 network: drop unused EnqueueMessage interface from Peer 2022-10-12 15:27:08 +03:00
Roman Khimov
b345581c72 network: pings are broadcasted, don't send them to everyone
Follow the general rules of broadcasts, even though it's somewhat different
from Inv, we just want to get some reply from our neighbors to see if we're
behind. We don't strictly need all neighbors for it.
2022-10-12 15:25:03 +03:00
Roman Khimov
e1d5f18ff4 network: fix outdated Peer interface comments 2022-10-12 10:16:07 +03:00
Roman Khimov
8b26d9475b network: speculatively set GetAddrSent status
Otherwise we routinely get "unexpected addr received" error.
2022-10-11 18:42:40 +03:00
Roman Khimov
e80c60a3b9 network: rework broadcast logic
We have a number of queues for different purposes:
 * regular broadcast queue
 * direct p2p queue
 * high-priority queue

And two basic egress scenarios:
 * direct p2p messages (replies to requests in Server's handle* methods)
 * broadcasted messages

Low priority broadcasted messages:
 * transaction inventories
 * block inventories
 * notary inventories
 * non-consensus extensibles

High-priority broadcasted messages:
 * consensus extensibles
 * getdata transaction requests from consensus process
 * getaddr requests

P2P messages are a bit more complicated, most of the time they use p2p queue,
but extensible message requests/replies use HP queue.

Server's handle* code is run from Peer's handleIncoming, every peer has this
thread that handles incoming messages. When working with the peer it's
important to reply to requests and blocking this thread until we send (queue)
a reply is fine, if the peer is slow we just won't get anything new from
it. The queue used is irrelevant wrt this issue.

Broadcasted messages are radically different, we want them to be delivered to
many peers, but we don't care about specific ones. If it's delivered to 2/3 of
the peers we're fine, if it's delivered to more of them --- it's not an
issue. But doing this fairly is not an easy thing, current code tries performing
unblocked sends and if this doesn't yield enough results it then blocks (but
has a timeout, we can't wait indefinitely). But it does so in sequential
manner, once the peer is chosen the code will wait for it (and only it) until
timeout happens.

What can be done instead is an attempt to push the message to all of the peers
simultaneously (or close to that). If they all deliver --- OK, if some block
and wait then we can wait until _any_ of them pushes the message through (or
global timeout happens, we still can't wait forever). If we have enough
deliveries then we can cancel pending ones and it's again not an error if
these canceled threads still do their job.

This makes the system more dynamic and adds some substantial processing
overhead, but it's a networking code, any of this overhead is much lower than
the actual packet delivery time. It also allows to spread the load more
fairly, if there is any spare queue it'll get the packet and release the
broadcaster. On the next broadcast iteration another peer is more likely to be
chosen just because it didn't get a message previously (and had some time to
deliver already queued messages).

It works perfectly in tests, with optimal networking conditions we have much
better block times and TPS increases by 5-25%% depending on the scenario.

I'd go as far as to say that it fixes the original problem of #2678, because
in this particular scenario we have empty queues in ~100% of the cases and
this new logic will likely lead to 100% fan out in this case (cancelation just
won't happen fast enough). But when the load grows and there is some waiting
in the queue it will optimize out the slowest links.
2022-10-11 18:42:40 +03:00
Roman Khimov
dabdad20ad network: don't wait indefinitely for packet to be sent
Peers can be slow, very slow, slow enough to affect node's regular
operation. We can't wait for them indefinitely, there has to be a timeout for
send operations.

This patch uses TimePerBlock as a reference for its timeout. It's relatively
big and it doesn't affect tests much, 4+1 scenarios tend to perform a little
worse with while 7+2 scenarios work a little better. The difference is in some
percents, but all of these tests easily have 10-15% variations from run to
run.

It's an important step in making our gossip better because we can't have any
behavior where neighbors directly block the node forever, refs. #2678 and
2022-10-10 22:15:21 +03:00
Roman Khimov
317dd42513 *: use uint*Size and SignatureLen constants where appropriate 2022-10-05 10:45:52 +03:00
Roman Khimov
4f3ffe7290 golangci: enable errorlint and fix everything it found 2022-09-02 18:36:23 +03:00
Roman Khimov
779a5c070f network: wait for exit in discoverer
And synchronize other threads with channels instead of mutexes. Overall this
scheme is more reliable.
2022-08-19 22:23:47 +03:00
Roman Khimov
eeeb0f6f0e core: accept two-side channels for sub/unsub, read on unsub
Blockchain's notificationDispatcher sends events to channels and these
channels must be read from. Unfortunately, regular service shutdown procedure
does unsubscription first (outside of the read loop) and only then drains the
channel. While it waits for unsubscription request to be accepted
notificationDispatcher can try pushing more data into the same channel which
will lead to a deadlock. Reading in the same method solves this, any number of
events can be pushed until unsub channel accepts the data.
2022-08-19 22:08:40 +03:00
Roman Khimov
dea75a4211 network: wait for the relayer thread to finish on shutdown
Unsubscribe and drain first, then return from the Shutdown method. It's
important wrt to subsequent chain shutdown process (normally it's closed right
after the network server).
2022-08-19 22:08:40 +03:00
Roman Khimov
155089f4e5 network: drop cleanup from TestVerifyNotaryRequest
It never runs the server, so 746644a4eb was a
bit wrong with this.
2022-08-19 20:54:06 +03:00
Anna Shaleva
916f2293b8 *: apply go 1.19 formatter heuristics
And make manual corrections where needed. See the "Common mistakes
and pitfalls" section of https://tip.golang.org/doc/comment.
2022-08-09 15:37:52 +03:00
Anna Shaleva
bb751535d3 *: bump minimum supported go version
Close #2497.
2022-08-08 13:59:32 +03:00
Roman Khimov
9b0ea2c21b network/consensus: always process dBFT messages as high priority
Move category definition from consensus to payload, consensus service is the
one of its kind (HP), so network.Server can be adjusted accordingly.
2022-08-02 13:07:18 +03:00
Roman Khimov
94a8784dcb network: allow to drop services and solve concurrency issues
Now that services can come and go we need to protect all of the associated
fields and allow to deregister them.
2022-08-02 13:05:39 +03:00
Roman Khimov
5a7fa2d3df cli: restart consensus service on USR2
Fix #1949. Also drop wallet from the ServerConfig since it's not used in any
meaningful way after this change.
2022-08-02 13:05:07 +03:00
Roman Khimov
2e27c3d829 metrics: move package to services
Where it belongs.
2022-07-21 23:38:23 +03:00
Anna Shaleva
1ae601787d network: allow to handle GetMPTData with KeepOnlyLatestState on
And adjust documentation along the way.
2022-07-14 14:33:20 +03:00
Roman Khimov
dc59dc991b config: move metrics.Config into config.BasicService
Config package should be as lightweight as possible and now it depends on the
whole metrics package just to get one structure from it.
2022-07-08 23:30:30 +03:00
Roman Khimov
3fbc1331aa
Merge pull request #2582 from nspcc-dev/fix-server-sync
network: adjust the way (*Server).IsInSync() works
2022-07-05 12:28:20 +03:00
Roman Khimov
9f05009d1a
Merge pull request #2580 from nspcc-dev/service-review
Service review
2022-07-05 12:23:25 +03:00
Anna Shaleva
0835581fa9 network: adjust the way (*Server).IsInSync() works
Always return true if sync was reached once. Fix #2564.
2022-07-05 12:20:31 +03:00
Roman Khimov
3e2eda6752 *: add some comments to service Start/Shutdown methods 2022-07-04 23:03:50 +03:00
Roman Khimov
c26a962b55 *: use localhost address instead of 127.0.0.1, fix #2575 2022-06-30 16:19:07 +03:00
Anna Shaleva
8ab422da66 *: properly unsubscribe from Blockchain events 2022-06-28 19:09:25 +03:00
Roman Khimov
75d06d18c9
Merge pull request #2466 from nspcc-dev/rules-fixes
Rules scope fixes
2022-05-06 11:09:39 +03:00
Roman Khimov
bd352daab4 transaction: fix Rules stringer, it's WitnessRules in C#
See neo-project/neo#2720.
2022-05-06 10:08:09 +03:00
Elizaveta Chichindaeva
28908aa3cf [#2442] English Check
Signed-off-by: Elizaveta Chichindaeva <elizaveta@nspcc.ru>
2022-05-04 19:48:27 +03:00
Roman Khimov
53423b7c37 network: fix panic in blockqueue during shutdown
panic: send on closed channel

goroutine 116 [running]:
github.com/nspcc-dev/neo-go/pkg/network.(*blockQueue).putBlock(0xc00011b650, 0xc01e371200)
        github.com/nspcc-dev/neo-go/pkg/network/blockqueue.go:129 +0x185
github.com/nspcc-dev/neo-go/pkg/network.(*Server).handleBlockCmd(0xc0002d3c00, {0xf69b7f?, 0xc001520010?}, 0xc02eb44000?)
        github.com/nspcc-dev/neo-go/pkg/network/server.go:607 +0x6f
github.com/nspcc-dev/neo-go/pkg/network.(*Server).handleMessage(0xc0002d3c00, {0x121f4c8?, 0xc001528000?}, 0xc01e35cf80)
        github.com/nspcc-dev/neo-go/pkg/network/server.go:1160 +0x6c5
github.com/nspcc-dev/neo-go/pkg/network.(*TCPPeer).handleIncoming(0xc001528000)
        github.com/nspcc-dev/neo-go/pkg/network/tcp_peer.go:189 +0x98
created by github.com/nspcc-dev/neo-go/pkg/network.(*TCPPeer).handleConn
        github.com/nspcc-dev/neo-go/pkg/network/tcp_peer.go:164 +0xcf
2022-04-26 00:31:48 +03:00
Roman Khimov
2593bb0535 network: extend Service with Name, use it to distinguish services 2022-04-26 00:31:48 +03:00
Evgeniy Stratonikov
34b1b52784 network: check compressed payload size in decompress
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
2022-03-24 17:22:55 +03:00
Anna Shaleva
753d604784 network: use net.ErrClosed to check network connection was closed
Close #1765.
2022-03-17 19:39:18 +03:00
Anna Shaleva
9bbd94d0fa network: tune waiting limits in tests
Some tests are failing on Windows due to slow runners with errors like the following:
```
2022-02-09T17:11:20.3127016Z     --- FAIL: TestGetData/transaction (1.82s)
2022-02-09T17:11:20.3127385Z         server_test.go:500:
2022-02-09T17:11:20.3127878Z             	Error Trace:	server_test.go:500
2022-02-09T17:11:20.3128533Z             	            				server_test.go:520
2022-02-09T17:11:20.3128978Z             	Error:      	Condition never satisfied
2022-02-09T17:11:20.3129479Z             	Test:       	TestGetData/transaction
```
2022-02-10 18:58:50 +03:00
Roman Khimov
e621f746a7 config/core: allow to change the number of validators
Fixes #2320.
2022-01-31 23:14:38 +03:00
Roman Khimov
60d6fa1125 network: keep a copy of the config inside of Server
Avoid copying the configuration again and again, make things a bit more
efficient.
2022-01-24 18:43:01 +03:00
Roman Khimov
89d754da6f network: don't request blocks we already have in the queue
Fixes #2258.
2022-01-18 00:04:41 +03:00
Roman Khimov
03fd91e857 network: use assert.Eventually in bq test
Simpler and more efficient (polls more often and completes the test sooner).
2022-01-18 00:04:29 +03:00
Roman Khimov
d52a06a82d network: move index-position relation into helper
Just to make things more clear, no functional changes.
2022-01-18 00:02:16 +03:00