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author | Pieter Wuille <pieter@wuille.net> | 2020-09-29 19:43:54 -0700 |
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committer | Dhruv Mehta <856960+dhruv@users.noreply.github.com> | 2021-03-03 09:48:07 -0800 |
commit | c733ac4d8a597b1001555b142f488ed9fbecc405 (patch) | |
tree | 2f70e30961fe9377c45fff118f57f57cc7f8eb71 /src/net_processing.cpp | |
parent | 4d98b401fbd821700f7a792b0a4cb52c9b71bc9f (diff) | |
download | bitcoin-c733ac4d8a597b1001555b142f488ed9fbecc405.tar.xz |
Convert block/header sync timeouts to std::chrono types
Diffstat (limited to 'src/net_processing.cpp')
-rw-r--r-- | src/net_processing.cpp | 57 |
1 files changed, 30 insertions, 27 deletions
diff --git a/src/net_processing.cpp b/src/net_processing.cpp index 5a8da35ff5..2189ddf722 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -43,10 +43,10 @@ static constexpr int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60; static constexpr std::chrono::seconds RELAY_TX_CACHE_TIME = std::chrono::minutes{15}; /** How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay). */ static constexpr std::chrono::seconds UNCONDITIONAL_RELAY_DELAY = std::chrono::minutes{2}; -/** Headers download timeout expressed in microseconds +/** Headers download timeout. * Timeout = base + per_header * (expected number of headers) */ -static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000; // 15 minutes -static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000; // 1ms/header +static constexpr auto HEADERS_DOWNLOAD_TIMEOUT_BASE = 15min; +static constexpr auto HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1ms; /** Protect at least this many outbound peers from disconnection due to slow/ * behind headers chain. */ @@ -93,8 +93,8 @@ static constexpr std::chrono::microseconds GETDATA_TX_INTERVAL{std::chrono::seco static const unsigned int MAX_GETDATA_SZ = 1000; /** Number of blocks that can be requested at any given time from a single peer. */ static const int MAX_BLOCKS_IN_TRANSIT_PER_PEER = 16; -/** Timeout in seconds during which a peer must stall block download progress before being disconnected. */ -static const unsigned int BLOCK_STALLING_TIMEOUT = 2; +/** Time during which a peer must stall block download progress before being disconnected. */ +static constexpr auto BLOCK_STALLING_TIMEOUT = 2s; /** Number of headers sent in one getheaders result. We rely on the assumption that if a peer sends * less than this number, we reached its tip. Changing this value is a protocol upgrade. */ static const unsigned int MAX_HEADERS_RESULTS = 2000; @@ -108,10 +108,10 @@ static const int MAX_BLOCKTXN_DEPTH = 10; * degree of disordering of blocks on disk (which make reindexing and pruning harder). We'll probably * want to make this a per-peer adaptive value at some point. */ static const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024; -/** Block download timeout base, expressed in millionths of the block interval (i.e. 10 min) */ -static const int64_t BLOCK_DOWNLOAD_TIMEOUT_BASE = 1000000; +/** Block download timeout base, expressed in multiples of the block interval (i.e. 10 min) */ +static constexpr double BLOCK_DOWNLOAD_TIMEOUT_BASE = 1; /** Additional block download timeout per parallel downloading peer (i.e. 5 min) */ -static const int64_t BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 500000; +static constexpr double BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 0.5; /** Maximum number of headers to announce when relaying blocks with headers message.*/ static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8; /** Maximum number of unconnecting headers announcements before DoS score */ @@ -533,12 +533,12 @@ struct CNodeState { //! Whether we've started headers synchronization with this peer. bool fSyncStarted; //! When to potentially disconnect peer for stalling headers download - int64_t nHeadersSyncTimeout; + std::chrono::microseconds m_headers_sync_timeout{0us}; //! Since when we're stalling block download progress (in microseconds), or 0. - int64_t nStallingSince; + std::chrono::microseconds m_stalling_since{0us}; std::list<QueuedBlock> vBlocksInFlight; //! When the first entry in vBlocksInFlight started downloading. Don't care when vBlocksInFlight is empty. - int64_t nDownloadingSince; + std::chrono::microseconds m_downloading_since{0us}; int nBlocksInFlight; int nBlocksInFlightValidHeaders; //! Whether we consider this a preferred download peer. @@ -621,9 +621,6 @@ struct CNodeState { pindexBestHeaderSent = nullptr; nUnconnectingHeaders = 0; fSyncStarted = false; - nHeadersSyncTimeout = 0; - nStallingSince = 0; - nDownloadingSince = 0; nBlocksInFlight = 0; nBlocksInFlightValidHeaders = 0; fPreferredDownload = false; @@ -672,11 +669,11 @@ bool PeerManagerImpl::MarkBlockAsReceived(const uint256& hash) } if (state->vBlocksInFlight.begin() == itInFlight->second.second) { // First block on the queue was received, update the start download time for the next one - state->nDownloadingSince = std::max(state->nDownloadingSince, count_microseconds(GetTime<std::chrono::microseconds>())); + state->m_downloading_since = std::max(state->m_downloading_since, GetTime<std::chrono::microseconds>()); } state->vBlocksInFlight.erase(itInFlight->second.second); state->nBlocksInFlight--; - state->nStallingSince = 0; + state->m_stalling_since = 0us; mapBlocksInFlight.erase(itInFlight); return true; } @@ -706,7 +703,7 @@ bool PeerManagerImpl::MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, co state->nBlocksInFlightValidHeaders += it->fValidatedHeaders; if (state->nBlocksInFlight == 1) { // We're starting a block download (batch) from this peer. - state->nDownloadingSince = GetTime<std::chrono::microseconds>().count(); + state->m_downloading_since = GetTime<std::chrono::microseconds>(); } if (state->nBlocksInFlightValidHeaders == 1 && pindex != nullptr) { nPeersWithValidatedDownloads++; @@ -4485,7 +4482,13 @@ bool PeerManagerImpl::SendMessages(CNode* pto) // Only actively request headers from a single peer, unless we're close to today. if ((nSyncStarted == 0 && fFetch) || pindexBestHeader->GetBlockTime() > GetAdjustedTime() - 24 * 60 * 60) { state.fSyncStarted = true; - state.nHeadersSyncTimeout = count_microseconds(current_time) + HEADERS_DOWNLOAD_TIMEOUT_BASE + HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER * (GetAdjustedTime() - pindexBestHeader->GetBlockTime())/(consensusParams.nPowTargetSpacing); + state.m_headers_sync_timeout = current_time + HEADERS_DOWNLOAD_TIMEOUT_BASE + + ( + // Convert HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER to microseconds before scaling + // to maintain precision + std::chrono::microseconds{HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER} * + (GetAdjustedTime() - pindexBestHeader->GetBlockTime()) / consensusParams.nPowTargetSpacing + ); nSyncStarted++; const CBlockIndex *pindexStart = pindexBestHeader; /* If possible, start at the block preceding the currently @@ -4795,7 +4798,7 @@ bool PeerManagerImpl::SendMessages(CNode* pto) // Detect whether we're stalling current_time = GetTime<std::chrono::microseconds>(); - if (state.nStallingSince && state.nStallingSince < count_microseconds(current_time) - 1000000 * BLOCK_STALLING_TIMEOUT) { + if (state.m_stalling_since.count() && state.m_stalling_since < current_time - BLOCK_STALLING_TIMEOUT) { // Stalling only triggers when the block download window cannot move. During normal steady state, // the download window should be much larger than the to-be-downloaded set of blocks, so disconnection // should only happen during initial block download. @@ -4803,7 +4806,7 @@ bool PeerManagerImpl::SendMessages(CNode* pto) pto->fDisconnect = true; return true; } - // In case there is a block that has been in flight from this peer for 2 + 0.5 * N times the block interval + // In case there is a block that has been in flight from this peer for block_interval * (1 + 0.5 * N) // (with N the number of peers from which we're downloading validated blocks), disconnect due to timeout. // We compensate for other peers to prevent killing off peers due to our own downstream link // being saturated. We only count validated in-flight blocks so peers can't advertise non-existing block hashes @@ -4811,17 +4814,17 @@ bool PeerManagerImpl::SendMessages(CNode* pto) if (state.vBlocksInFlight.size() > 0) { QueuedBlock &queuedBlock = state.vBlocksInFlight.front(); int nOtherPeersWithValidatedDownloads = nPeersWithValidatedDownloads - (state.nBlocksInFlightValidHeaders > 0); - if (count_microseconds(current_time) > state.nDownloadingSince + consensusParams.nPowTargetSpacing * (BLOCK_DOWNLOAD_TIMEOUT_BASE + BLOCK_DOWNLOAD_TIMEOUT_PER_PEER * nOtherPeersWithValidatedDownloads)) { + if (current_time > state.m_downloading_since + std::chrono::seconds{consensusParams.nPowTargetSpacing} * (BLOCK_DOWNLOAD_TIMEOUT_BASE + BLOCK_DOWNLOAD_TIMEOUT_PER_PEER * nOtherPeersWithValidatedDownloads)) { LogPrintf("Timeout downloading block %s from peer=%d, disconnecting\n", queuedBlock.hash.ToString(), pto->GetId()); pto->fDisconnect = true; return true; } } // Check for headers sync timeouts - if (state.fSyncStarted && state.nHeadersSyncTimeout < std::numeric_limits<int64_t>::max()) { + if (state.fSyncStarted && state.m_headers_sync_timeout < std::chrono::microseconds::max()) { // Detect whether this is a stalling initial-headers-sync peer if (pindexBestHeader->GetBlockTime() <= GetAdjustedTime() - 24 * 60 * 60) { - if (count_microseconds(current_time) > state.nHeadersSyncTimeout && nSyncStarted == 1 && (nPreferredDownload - state.fPreferredDownload >= 1)) { + if (current_time > state.m_headers_sync_timeout && nSyncStarted == 1 && (nPreferredDownload - state.fPreferredDownload >= 1)) { // Disconnect a peer (without the noban permission) if it is our only sync peer, // and we have others we could be using instead. // Note: If all our peers are inbound, then we won't @@ -4840,13 +4843,13 @@ bool PeerManagerImpl::SendMessages(CNode* pto) // this peer (eventually). state.fSyncStarted = false; nSyncStarted--; - state.nHeadersSyncTimeout = 0; + state.m_headers_sync_timeout = 0us; } } } else { // After we've caught up once, reset the timeout so we can't trigger // disconnect later. - state.nHeadersSyncTimeout = std::numeric_limits<int64_t>::max(); + state.m_headers_sync_timeout = std::chrono::microseconds::max(); } } @@ -4870,8 +4873,8 @@ bool PeerManagerImpl::SendMessages(CNode* pto) pindex->nHeight, pto->GetId()); } if (state.nBlocksInFlight == 0 && staller != -1) { - if (State(staller)->nStallingSince == 0) { - State(staller)->nStallingSince = count_microseconds(current_time); + if (State(staller)->m_stalling_since == 0us) { + State(staller)->m_stalling_since = current_time; LogPrint(BCLog::NET, "Stall started peer=%d\n", staller); } } |