From 153177cf4adee620a1ac3192f27616062d5bfd08 Mon Sep 17 00:00:00 2001
From: UdjinM6 <UdjinM6@users.noreply.github.com>
Date: Mon, 27 Nov 2023 21:57:55 +0300
Subject: [PATCH] fix: move CheckQuorumConnections to a separate thread

---
 src/llmq/quorums.cpp | 27 ++++++++++++++++++++++++---
 src/llmq/quorums.h   |  1 +
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/llmq/quorums.cpp b/src/llmq/quorums.cpp
index 67b464770b3be0..899de1dbdb55a1 100644
--- a/src/llmq/quorums.cpp
+++ b/src/llmq/quorums.cpp
@@ -278,9 +278,7 @@ void CQuorumManager::UpdatedBlockTip(const CBlockIndex* pindexNew, bool fInitial
         return;
     }
 
-    for (const auto& params : Params().GetConsensus().llmqs) {
-        CheckQuorumConnections(params, pindexNew);
-    }
+    StartCheckQuorumConnectionsThreads(pindexNew);
 
     {
         // Cleanup expired data requests
@@ -299,8 +297,26 @@ void CQuorumManager::UpdatedBlockTip(const CBlockIndex* pindexNew, bool fInitial
     CleanupOldQuorumData(pindexNew);
 }
 
+void CQuorumManager::StartCheckQuorumConnectionsThreads(const CBlockIndex* pindexNew) const
+{
+    for (const auto& params : Params().GetConsensus().llmqs) {
+        // do not block the caller thread
+        workerPool.push([params, pindexNew, this](int threadId) {
+            CheckQuorumConnections(params, pindexNew);
+        });
+    }
+}
+
 void CQuorumManager::CheckQuorumConnections(const Consensus::LLMQParams& llmqParams, const CBlockIndex* pindexNew) const
 {
+    cxxtimer::Timer t(/*start=*/ true);
+    LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- llmqType[%d] h[%d] start\n", __func__, ToUnderlying(llmqParams.type), pindexNew->nHeight);
+
+    if (quorumThreadInterrupt) {
+        LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- llmqType[%d] h[%d] aborted. time=%d\n", __func__, ToUnderlying(llmqParams.type), pindexNew->nHeight, t.count());
+        return;
+    }
+
     auto lastQuorums = ScanQuorums(llmqParams.type, pindexNew, (size_t)llmqParams.keepOldConnections);
 
     auto connmanQuorumsToDelete = connman.GetMasternodeQuorums(llmqParams.type);
@@ -335,6 +351,10 @@ void CQuorumManager::CheckQuorumConnections(const Consensus::LLMQParams& llmqPar
                     });
 
     for (const auto& quorum : lastQuorums) {
+        if (quorumThreadInterrupt) {
+            LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- llmqType[%d] h[%d] aborted. time=%d\n", __func__, ToUnderlying(llmqParams.type), pindexNew->nHeight, t.count());
+            return;
+        }
         if (utils::EnsureQuorumConnections(llmqParams, quorum->m_quorum_base_block_index, connman, myProTxHash)) {
             if (connmanQuorumsToDelete.erase(quorum->qc->quorumHash) > 0) {
                 LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- llmqType[%d] h[%d] keeping mn quorum connections for quorum: [%d:%s]\n", __func__, ToUnderlying(llmqParams.type), pindexNew->nHeight, quorum->m_quorum_base_block_index->nHeight, quorum->m_quorum_base_block_index->GetBlockHash().ToString());
@@ -361,6 +381,7 @@ void CQuorumManager::CheckQuorumConnections(const Consensus::LLMQParams& llmqPar
         LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- removing masternodes quorum connections for quorum %s:\n", __func__, quorumHash.ToString());
         connman.RemoveMasternodeQuorumNodes(llmqParams.type, quorumHash);
     }
+    LogPrint(BCLog::LLMQ, "CQuorumManager::%s -- llmqType[%d] h[%d] done. time=%d\n", __func__, ToUnderlying(llmqParams.type), pindexNew->nHeight, t.count());
 }
 
 CQuorumPtr CQuorumManager::BuildQuorumFromCommitment(const Consensus::LLMQType llmqType, gsl::not_null<const CBlockIndex*> pQuorumBaseBlockIndex) const
diff --git a/src/llmq/quorums.h b/src/llmq/quorums.h
index bc2eba6ae42509..48d5276def9144 100644
--- a/src/llmq/quorums.h
+++ b/src/llmq/quorums.h
@@ -263,6 +263,7 @@ class CQuorumManager
 
 private:
     // all private methods here are cs_main-free
+    void StartCheckQuorumConnectionsThreads(const CBlockIndex *pindexNew) const;
     void CheckQuorumConnections(const Consensus::LLMQParams& llmqParams, const CBlockIndex *pindexNew) const;
 
     CQuorumPtr BuildQuorumFromCommitment(Consensus::LLMQType llmqType, gsl::not_null<const CBlockIndex*> pQuorumBaseBlockIndex) const;