Change dataset cache sizes

consensus/progpow/algorithm.go

@@ -19,7 +19,6 @@ package progpow
 import (
 	"encoding/binary"
 	"hash"
-	"math"
 	"math/big"
 	"reflect"
 	"runtime"
@@ -35,29 +34,33 @@ import (
 	"github.com/dominant-strategies/go-quai/common/bitutil"
 	"github.com/dominant-strategies/go-quai/crypto"
 	"github.com/dominant-strategies/go-quai/log"
+	"github.com/dominant-strategies/go-quai/params"
 )
 
 const (
-	datasetInitBytes   = 1 << 30        // Bytes in dataset at genesis
-	datasetGrowthBytes = 1 << 23        // Dataset growth per epoch
-	cacheInitBytes     = 1 << 24        // Bytes in cache at genesis
-	cacheGrowthBytes   = 1 << 17        // Cache growth per epoch
-	C_epochLength      = math.MaxUint64 // Blocks per epoch
-	mixBytes           = 128            // Width of mix
-	hashBytes          = 64             // Hash length in bytes
-	hashWords          = 16             // Number of 32 bit ints in a hash
-	datasetParents     = 512            // Number of parents of each dataset element
-	cacheRounds        = 3              // Number of rounds in cache production
-	loopAccesses       = 64             // Number of accesses in hashimoto loop
+	datasetInitBytes   = 1 << 32 // Bytes in dataset at genesis
+	datasetGrowthBytes = 1 << 25 // Dataset growth per epoch
+	cacheInitBytes     = 1 << 24 // Bytes in cache at genesis
+	cacheGrowthBytes   = 1 << 20 // Cache growth per epoch
+	mixBytes           = 128     // Width of mix
+	hashBytes          = 64      // Hash length in bytes
+	hashWords          = 16      // Number of 32 bit ints in a hash
+	datasetParents     = 512     // Number of parents of each dataset element
+	cacheRounds        = 3       // Number of rounds in cache production
+	loopAccesses       = 64      // Number of accesses in hashimoto loop
+)
+
+var (
+	C_epochLength = params.BlocksPerDay * 30 / 4 // 30 days worth of prime blocks
 )
 
 // cacheSize returns the size of the ethash verification cache that belongs to a certain
 // block number.
 func cacheSize(block uint64) uint64 {
 	epoch := int(block / C_epochLength)
-	if epoch < maxEpoch {
-		return cacheSizes[epoch]
-	}
+	// if epoch < maxEpoch {
+	// 	return cacheSizes[epoch]
+	// }
 	return calcCacheSize(epoch)
 }
 
@@ -76,9 +79,9 @@ func calcCacheSize(epoch int) uint64 {
 // block number.
 func datasetSize(block uint64) uint64 {
 	epoch := int(block / C_epochLength)
-	if epoch < maxEpoch {
-		return datasetSizes[epoch]
-	}
+	// if epoch < maxEpoch {
+	// 	return datasetSizes[epoch]
+	// }
 	return calcDatasetSize(epoch)
 }