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init: add -txsendrate configuration parameter

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Adds a debug-only configuration option to set the target
transaction/second rate for relay to inbound connections. This is mostly
intended to be set to artificially low values to aid in testing behaviour
when a backlog occurs, but is also available in case the default 14tx/s
target is somehow too low in practice.
This commit is contained in:
Anthony Towns
2026-02-19 19:50:28 +10:00
parent 6307bd034b
commit 74a47a5207
5 changed files with 16 additions and 9 deletions
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11
src/net_processing.cpp
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@@ -168,11 +168,6 @@ static constexpr auto INBOUND_INVENTORY_BROADCAST_INTERVAL{5s};
* Use a smaller delay as there is less privacy concern for them.
* Blocks and peers with NetPermissionFlags::NoBan permission bypass this. */
static constexpr auto OUTBOUND_INVENTORY_BROADCAST_INTERVAL{2s};
/** Maximum rate of inventory items to send per second.
* Limits the impact of low-fee transaction floods. */
[[maybe_unused]] static constexpr unsigned int INVENTORY_BROADCAST_PER_SECOND{14};
/** Target number of tx inventory items to send per transmission. */
[[maybe_unused]] static constexpr unsigned int INVENTORY_BROADCAST_TARGET = INVENTORY_BROADCAST_PER_SECOND * count_seconds(INBOUND_INVENTORY_BROADCAST_INTERVAL);
/** Multiplier for the inventory bucket rate for outbounds */
static constexpr double OUTBOUND_INVENTORY_BUCKET_MULTIPLIER{Ticks<SecondsDouble>(INBOUND_INVENTORY_BROADCAST_INTERVAL) / Ticks<SecondsDouble>(OUTBOUND_INVENTORY_BROADCAST_INTERVAL)};
/** Delay between checking inventory bucket and backlog */
@@ -531,7 +526,7 @@ struct InvToSendBucket {
static constexpr double INBOUND_COUNT_SECONDS{30}; // cap/initial at 30s/mult worth of txs
InvToSendBucket(unsigned int rate, double mult)
: count_floor{-1.0 * INVENTORY_BROADCAST_TARGET},
: count_floor{-1.0 * rate * count_seconds(INBOUND_INVENTORY_BROADCAST_INTERVAL)},
size_bucket(/*rate=*/SIZE_REFILL * mult, /*value=*/SIZE_INIT, /*cap=*/SIZE_CAP),
count_bucket(/*rate=*/rate * mult, /*value=*/rate * INBOUND_COUNT_SECONDS, /*cap=*/rate * INBOUND_COUNT_SECONDS)
{
@@ -2112,8 +2107,8 @@ PeerManagerImpl::PeerManagerImpl(CConnman& connman, AddrMan& addrman,
m_txdownloadman(node::TxDownloadOptions{pool, m_rng, opts.deterministic_rng}),
m_warnings{warnings},
m_opts{opts},
m_inbound_inv_bucket(/*rate=*/INVENTORY_BROADCAST_PER_SECOND, /*mult=*/1.0),
m_outbound_inv_bucket(/*rate=*/INVENTORY_BROADCAST_PER_SECOND, /*mult=*/OUTBOUND_INVENTORY_BUCKET_MULTIPLIER)
m_inbound_inv_bucket(/*rate=*/m_opts.tx_send_rate, /*mult=*/1.0),
m_outbound_inv_bucket(/*rate=*/m_opts.tx_send_rate, /*mult=*/OUTBOUND_INVENTORY_BUCKET_MULTIPLIER)
{
// While Erlay support is incomplete, it must be enabled explicitly via -txreconciliation.
// This argument can go away after Erlay support is complete.