github.com/Cleverse/go-ethereum@v0.0.0-20220927095127-45113064e7f2/arbitrum/bloom.go (about)

     1  package arbitrum
     2  
     3  import (
     4  	"time"
     5  
     6  	"github.com/ethereum/go-ethereum/eth"
     7  )
     8  
     9  const (
    10  	// bloomServiceThreads is the number of goroutines used globally by an Ethereum
    11  	// instance to service bloombits lookups for all running filters.
    12  	bloomServiceThreads = 16
    13  
    14  	// bloomFilterThreads is the number of goroutines used locally per filter to
    15  	// multiplex requests onto the global servicing goroutines.
    16  	bloomFilterThreads = 3
    17  
    18  	// bloomRetrievalBatch is the maximum number of bloom bit retrievals to service
    19  	// in a single batch.
    20  	bloomRetrievalBatch = 16
    21  
    22  	// bloomRetrievalWait is the maximum time to wait for enough bloom bit requests
    23  	// to accumulate request an entire batch (avoiding hysteresis).
    24  	bloomRetrievalWait = time.Duration(0)
    25  )
    26  
    27  // startBloomHandlers starts a batch of goroutines to accept bloom bit database
    28  // retrievals from possibly a range of filters and serving the data to satisfy.
    29  func (b *Backend) startBloomHandlers(sectionSize uint64) {
    30  	for i := 0; i < bloomServiceThreads; i++ {
    31  		go func() {
    32  			for {
    33  				select {
    34  				case _, more := <-b.chanClose:
    35  					if !more {
    36  						return
    37  					}
    38  				case request := <-b.bloomRequests:
    39  					task := <-request
    40  					eth.ServeBloombitRetrieval(task, b.chainDb, sectionSize)
    41  					request <- task
    42  				}
    43  			}
    44  		}()
    45  	}
    46  }