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Make stall threshold configurable and reset parameters to be more appropriate for most wallets.

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This commit is contained in:
Mike Hearn 2015-03-18 13:30:42 +01:00
parent f693d88620
commit ed3ef7d15e
1 changed files with 52 additions and 18 deletions
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70
core/src/main/java/org/bitcoinj/core/PeerGroup.java
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@ -1464,12 +1464,33 @@ public class PeerGroup implements TransactionBroadcaster {
}
}
@GuardedBy("lock") private int stallPeriodSeconds = 10;
@GuardedBy("lock") private int stallMinSpeed = 15;
/**
* Configures the stall speed: the speed at which a peer is considered to be serving us the block chain
* unacceptably slowly. Once a peer has served us slower than the given "blocks per second" for the given
* number of seconds, it is considered stalled and will be disconnected, forcing the chain download to be
* restarted from a different peer. The defaults are chosen to work well for regular wallets and platforms,
* but if you are running on a platform that is CPU constrained the default settings may need adjustment to
* avoid false stalls.
*
* @param periodSecs How many seconds the download speed must be below blocksPerSec, defaults to 10.
* @param blocksPerSec How many blocks per second the speed must be consistently below, defaults to 10.
*/
public void setStallThreshold(int periodSecs, int blocksPerSec) {
lock.lock();
try {
stallPeriodSeconds = periodSecs;
stallMinSpeed = blocksPerSec;
} finally {
lock.unlock();
}
}
private class ChainDownloadSpeedCalculator extends AbstractPeerEventListener implements Runnable {
private int blocksInLastSecond, txnsInLastSecond, origTxnsInLastSecond, stallWarning;
private static final int STALL_PERIOD_SECONDS = 15;
private static final int STALL_MIN_SPEED = 5;
@Override
public synchronized void onBlocksDownloaded(Peer peer, Block block, @Nullable FilteredBlock filteredBlock, int blocksLeft) {
blocksInLastSecond++;
@ -1483,24 +1504,37 @@ public class PeerGroup implements TransactionBroadcaster {
}
@Override
public synchronized void run() {
if (blocksInLastSecond > 0) {
log.info("{} blocks/sec, {} tx/sec, {} pre-filtered tx/sec", blocksInLastSecond, txnsInLastSecond, origTxnsInLastSecond);
if (blocksInLastSecond >= STALL_MIN_SPEED)
stallWarning = 0;
public void run() {
int period;
int minSpeed;
lock.lock();
try {
period = stallPeriodSeconds;
minSpeed = stallMinSpeed;
} finally {
lock.unlock();
}
if (chain != null && chain.getBestChainHeight() < getMostCommonChainHeight() && blocksInLastSecond < STALL_MIN_SPEED && stallWarning > -1) {
stallWarning++;
if (stallWarning == STALL_PERIOD_SECONDS) {
stallWarning = -1;
Peer peer = getDownloadPeer();
log.warn("Chain download stalled: slow progress for {} seconds, disconnecting {}", STALL_PERIOD_SECONDS, peer);
peer.close();
synchronized (this) {
if (blocksInLastSecond > 0) {
log.info("{} blocks/sec, {} tx/sec, {} pre-filtered tx/sec", blocksInLastSecond, txnsInLastSecond, origTxnsInLastSecond);
if (blocksInLastSecond >= period)
stallWarning = 0;
}
if (chain != null && chain.getBestChainHeight() < getMostCommonChainHeight() && blocksInLastSecond < minSpeed && stallWarning > -1) {
stallWarning++;
if (stallWarning == minSpeed) {
stallWarning = -1;
Peer peer = getDownloadPeer();
log.warn("Chain download stalled: slow progress for {} seconds, disconnecting {}", period, peer);
peer.close();
}
}
blocksInLastSecond = 0;
txnsInLastSecond = 0;
origTxnsInLastSecond = 0;
}
blocksInLastSecond = 0;
txnsInLastSecond = 0;
origTxnsInLastSecond = 0;
}
}
@Nullable private ChainDownloadSpeedCalculator chainDownloadSpeedCalculator;