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eth/downloader: make block body download throttle heuristic based on worst-case block size at the current gas limit

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This commit is contained in:
Jared Wasinger 2025-03-27 18:26:00 +01:00
parent 83cc2cda25
commit bfeffc573c
1 changed files with 8 additions and 18 deletions
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26
eth/downloader/queue.go
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@ -373,26 +373,16 @@ func (q *queue) Results(block bool) []*fetchResult {
q.lock.Unlock()
}
// Regardless if closed or not, we can still deliver whatever we have
results := q.resultCache.GetCompleted(maxResultsProcess)
for _, result := range results {
// Recalculate the result item weights to prevent memory exhaustion
size := result.Header.Size()
for _, uncle := range result.Uncles {
size += uncle.Size()
}
for _, receipt := range result.Receipts {
size += receipt.Size()
}
for _, tx := range result.Transactions {
size += common.StorageSize(tx.Size())
}
size += common.StorageSize(result.Withdrawals.Size())
q.resultSize = common.StorageSize(blockCacheSizeWeight)*size +
(1-common.StorageSize(blockCacheSizeWeight))*q.resultSize
// set a throttle threshhold based on estimated worst-sized block that can be created for a given gas limit.
targetSize := uint64(256_000_000)
gasLimit := results[0].Header.GasLimit
if gasLimit == 0 {
gasLimit = 1
}
// Using the newly calibrated resultsize, figure out the new throttle limit
// on the result cache
throttleThreshold := uint64((common.StorageSize(blockCacheMemory) + q.resultSize - 1) / q.resultSize)
throttleThreshold := min(targetSize/(gasLimit/10), 2048)
throttleThreshold = q.resultCache.SetThrottleThreshold(throttleThreshold)
// With results removed from the cache, wake throttled fetchers