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Wrong Mathematica code for tabulating DAG sizes #86

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Wrong Mathematica code for tabulating DAG sizes #86

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a607a31
Wrong Mathematica code for tabulating DAG sizes
Aug 7, 2016
cb9c80d
Retrieved GetDataSizes from Ethereum history
Aug 7, 2016
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49 changes: 26 additions & 23 deletions src/libethash/data_sizes.h
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Original file line number Diff line number Diff line change
Expand Up @@ -35,18 +35,19 @@ extern "C" {

// Generated with the following Mathematica Code:

// GetCacheSizes[n_] := Module[{
// CacheSizeBytesInit = 2^24,
// CacheGrowth = 2^17,
// HashBytes = 64,
// j = 0},
// Reap[
// While[j < n,
// Module[{i =
// Floor[(CacheSizeBytesInit + CacheGrowth * j) / HashBytes]},
// While[! PrimeQ[i], i--];
// Sow[i*HashBytes]; j++]]]][[2]][[1]]

// GetDataSizes[n_] := Module[{
// DataSetSizeBytesInit = 2^30,
// MixBytes = 128,
// DataSetGrowth = 2^23,
// j = 0},
// Reap[
// While[j < n,
// Module[{i =
// Floor[(DataSetSizeBytesInit + DataSetGrowth * j) / MixBytes]},
// While[! PrimeQ[i], i--];
// Sow[i*MixBytes]; j++]]]][[2]][[1]]
//
// GetDataSizes[2048]

static const uint64_t dag_sizes[2048] = {
1073739904U, 1082130304U, 1090514816U, 1098906752U, 1107293056U,
Expand Down Expand Up @@ -461,21 +462,23 @@ static const uint64_t dag_sizes[2048] = {
18228444544U, 18236833408U, 18245220736U
};

// 2048 Epochs (~20 years) worth of tabulated cache sizes

// Generated with the following Mathematica Code:

// GetCacheSizes[n_] := Module[{
// DataSetSizeBytesInit = 2^30,
// MixBytes = 128,
// DataSetGrowth = 2^23,
// HashBytes = 64,
// CacheMultiplier = 1024,
// j = 0},
// Reap[
// While[j < n,
// Module[{i = Floor[(DataSetSizeBytesInit + DataSetGrowth * j) / (CacheMultiplier * HashBytes)]},
// While[! PrimeQ[i], i--];
// Sow[i*HashBytes]; j++]]]][[2]][[1]]
// CacheSizeBytesInit = 2^24,
// CacheGrowth = 2^17,
// HashBytes = 64,
// j = 0},
// Reap[
// While[j < n,
// Module[{i =
// Floor[(CacheSizeBytesInit + CacheGrowth * j) / HashBytes]},
// While[! PrimeQ[i], i--];
// Sow[i*HashBytes]; j++]]]][[2]][[1]]
//
// GetCacheSizes[2048]

const uint64_t cache_sizes[2048] = {
16776896U, 16907456U, 17039296U, 17170112U, 17301056U, 17432512U, 17563072U,
Expand Down