IMBENJI.NET/SweepStore
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Fixed windows deadlocks, performance is shit tho

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This commit is contained in:
ImBenji
2025-12-11 17:40:35 +00:00
parent fc7297e0f8
commit 0836935888
2 changed files with 26 additions and 5 deletions
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26
cpp/src/Private/sweepstore/concurrency.cpp
View File

@@ -107,13 +107,13 @@ void SweepstoreConcurrency::spawnTicket(SweepstoreFileHandle* _file,
SweepstoreWorkerTicketSnapshot snapshot = ticket.snapshot();
int identifier = snapshot.identifier;
uint32_t identifier = snapshot.identifier;
bool identifier_unassigned = identifier == 0;
bool stale_heartbeat = millisecondsSinceEpoch32() - snapshot.workerHeartbeat > STALE_HEARTBEAT_THRESHOLD_MS;
bool is_free = snapshot.state == SweepstoreTicketState::FREE;
if (identifier_unassigned && stale_heartbeat && is_free) {
if ((identifier_unassigned && is_free) || stale_heartbeat) {
SWEEPSTORE_TIME_SCOPE("Claim Ticket");
snapshot.identifier = newIdentifier;
snapshot.workerHeartbeat = millisecondsSinceEpoch32();
@@ -218,7 +218,7 @@ void SweepstoreConcurrency::initialiseMaster(std::string filePath) {
SWEEPSTORE_TIME_FUNCTION();
auto log = [&](const std::string &message) {
debugPrint("\033[38;5;33m[Concurrency Master]:\033[0m " + message);
debugPrint(("\033[38;5;33m[Concurrency Master]:\033[0m " + message).c_str());
};
SweepstoreFileHandle file(filePath, std::ios::binary | std::ios::in | std::ios::out);
@@ -252,9 +252,27 @@ void SweepstoreConcurrency::initialiseMaster(std::string filePath) {
ticket.write(cleanSnapshot);
log("Reset ticket " + std::to_string(i) + ".");
}
}
// Handle stale tickets
continue;
// Cleanup any stale tickets
uint32_t currentTime = millisecondsSinceEpoch32();
for (uint32_t i = 0; i < concurrentWorkers; i++) {
SweepstoreWorkerTicket ticket(i, file);
SweepstoreWorkerTicketSnapshot snapshot = ticket.snapshot();
if (snapshot.state != SweepstoreTicketState::FREE) {
continue;
}
bool stale_heartbeat = currentTime - snapshot.workerHeartbeat > STALE_HEARTBEAT_THRESHOLD_MS;
if (stale_heartbeat) {
SweepstoreWorkerTicketSnapshot cleanSnapshot = SweepstoreWorkerTicketSnapshot();
ticket.write(cleanSnapshot);
log("Stale heartbeat " + std::to_string(i) + ".");
}
}
preciseSleep(std::chrono::milliseconds(1));

3
cpp/src/Public/sweepstore/utils/file_lock.h
View File

@@ -84,6 +84,9 @@ private:
if (it->second == Mode::Shared && mode == Mode::Exclusive) {
releaseInternal(); // Release the old shared lock
activeLocks.erase(it);
// Small delay to allow OS to process the unlock before re-locking
// This prevents deadlock when multiple threads upgrade simultaneously
Sleep(1);
} else {
// Already hold compatible or same lock
locked = true;