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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,95 +1,18 @@ | ||
| package rank | ||
|
|
||
| import ( | ||
| . "github.com/cybercongress/cyberd/cosmos/poc/app/storage" | ||
| "sync" | ||
| ) | ||
| import . "github.com/cybercongress/cyberd/cosmos/poc/app/storage" | ||
|
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| type ComputeUnit int | ||
|
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| const ( | ||
| d float64 = 0.85 | ||
| tolerance float64 = 1e-3 | ||
| CPU ComputeUnit = iota | ||
| GPU ComputeUnit = iota | ||
| ) | ||
|
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| func CalculateRank(data *InMemoryStorage) ([]float64, int) { | ||
|
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| inLinks := data.GetInLinks() | ||
|
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| size := data.GetCidsCount() | ||
| if size == 0 { | ||
| return []float64{}, 0 | ||
| } | ||
|
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| rank := make([]float64, size) | ||
| defaultRank := (1.0 - d) / float64(size) | ||
| danglingNodesSize := uint64(0) | ||
|
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| for i := range rank { | ||
| rank[i] = defaultRank | ||
| if len(inLinks[CidNumber(i)]) == 0 { | ||
| danglingNodesSize++ | ||
| } | ||
| } | ||
|
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| innerProductOverSize := defaultRank * (float64(danglingNodesSize) / float64(size)) | ||
| defaultRankWithCorrection := float64(d*innerProductOverSize) + defaultRank | ||
|
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| change := tolerance + 1 | ||
|
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| steps := 0 | ||
| prevrank := make([]float64, 0) | ||
| prevrank = append(prevrank, rank...) | ||
| for change > tolerance { | ||
| rank = step(defaultRankWithCorrection, prevrank, data) | ||
| change = calculateChange(prevrank, rank) | ||
| prevrank = rank | ||
| steps++ | ||
| } | ||
|
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| return rank, steps | ||
| } | ||
|
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| func step(defaultRankWithCorrection float64, prevrank []float64, data *InMemoryStorage) []float64 { | ||
|
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| rank := append(make([]float64, 0, len(prevrank)), prevrank...) | ||
|
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| var wg sync.WaitGroup | ||
| wg.Add(len(data.GetInLinks())) | ||
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| for i, inLinksForI := range data.GetInLinks() { | ||
|
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| go func(cid CidNumber, inLinks CidLinks) { | ||
| defer wg.Done() | ||
| ksum := float64(0) | ||
|
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| //todo dependent on range iterator order, that non-deterministic | ||
| for j := range inLinks { | ||
| linkStake := data.GetOverallLinkStake(CidNumber(j), CidNumber(cid)) | ||
| jCidOutStake := data.GetOverallOutLinksStake(CidNumber(j)) | ||
| weight := float64(linkStake) / float64(jCidOutStake) | ||
| ksum = float64(prevrank[j]*weight) + ksum //force no-fma here by explicit conversion | ||
| } | ||
|
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| rank[cid] = float64(ksum*d) + defaultRankWithCorrection //force no-fma here by explicit conversion | ||
| }(i, inLinksForI) | ||
| } | ||
| wg.Wait() | ||
| return rank | ||
| } | ||
|
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| func calculateChange(prevrank, rank []float64) float64 { | ||
|
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| maxDiff := 0.0 | ||
| diff := 0.0 | ||
| for i, pForI := range prevrank { | ||
| if pForI > rank[i] { | ||
| diff = pForI - rank[i] | ||
| } else { | ||
| diff = rank[i] - pForI | ||
| } | ||
| if diff > maxDiff { | ||
| maxDiff = diff | ||
| } | ||
| func CalculateRank(data *InMemoryStorage, unit ComputeUnit) ([]float64, int) { | ||
| if unit == CPU { | ||
| return calculateRankCPU(data) | ||
| } else { | ||
| return calculateRankGPU(data) | ||
| } | ||
|
|
||
| return maxDiff | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package rank | ||
|
|
||
| import ( | ||
| . "github.com/cybercongress/cyberd/cosmos/poc/app/storage" | ||
| "sync" | ||
| ) | ||
|
|
||
| const ( | ||
| d float64 = 0.85 | ||
| tolerance float64 = 1e-3 | ||
| ) | ||
|
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| func calculateRankCPU(data *InMemoryStorage) ([]float64, int) { | ||
|
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| inLinks := data.GetInLinks() | ||
|
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| size := data.GetCidsCount() | ||
| if size == 0 { | ||
| return []float64{}, 0 | ||
| } | ||
|
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| rank := make([]float64, size) | ||
| defaultRank := (1.0 - d) / float64(size) | ||
| danglingNodesSize := uint64(0) | ||
|
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| for i := range rank { | ||
| rank[i] = defaultRank | ||
| if len(inLinks[CidNumber(i)]) == 0 { | ||
| danglingNodesSize++ | ||
| } | ||
| } | ||
|
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| innerProductOverSize := defaultRank * (float64(danglingNodesSize) / float64(size)) | ||
| defaultRankWithCorrection := float64(d*innerProductOverSize) + defaultRank | ||
|
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| change := tolerance + 1 | ||
|
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| steps := 0 | ||
| prevrank := make([]float64, 0) | ||
| prevrank = append(prevrank, rank...) | ||
| for change > tolerance { | ||
| rank = step(defaultRankWithCorrection, prevrank, data) | ||
| change = calculateChange(prevrank, rank) | ||
| prevrank = rank | ||
| steps++ | ||
| } | ||
|
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| return rank, steps | ||
| } | ||
|
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| func step(defaultRankWithCorrection float64, prevrank []float64, data *InMemoryStorage) []float64 { | ||
|
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| rank := append(make([]float64, 0, len(prevrank)), prevrank...) | ||
|
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| var wg sync.WaitGroup | ||
| wg.Add(len(data.GetInLinks())) | ||
|
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| for i, inLinksForI := range data.GetInLinks() { | ||
|
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| go func(cid CidNumber, inLinks CidLinks) { | ||
| defer wg.Done() | ||
| ksum := float64(0) | ||
|
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| //todo dependent on range iterator order, that non-deterministic | ||
| for j := range inLinks { | ||
| linkStake := data.GetOverallLinkStake(CidNumber(j), CidNumber(cid)) | ||
| jCidOutStake := data.GetOverallOutLinksStake(CidNumber(j)) | ||
| weight := float64(linkStake) / float64(jCidOutStake) | ||
| ksum = float64(prevrank[j]*weight) + ksum //force no-fma here by explicit conversion | ||
| } | ||
|
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| rank[cid] = float64(ksum*d) + defaultRankWithCorrection //force no-fma here by explicit conversion | ||
| }(i, inLinksForI) | ||
| } | ||
| wg.Wait() | ||
| return rank | ||
| } | ||
|
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| func calculateChange(prevrank, rank []float64) float64 { | ||
|
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| maxDiff := 0.0 | ||
| diff := 0.0 | ||
| for i, pForI := range prevrank { | ||
| if pForI > rank[i] { | ||
| diff = pForI - rank[i] | ||
| } else { | ||
| diff = rank[i] - pForI | ||
| } | ||
| if diff > maxDiff { | ||
| maxDiff = diff | ||
| } | ||
| } | ||
|
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||
| return maxDiff | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package rank | ||
|
|
||
| import ( | ||
| "fmt" | ||
| . "github.com/cybercongress/cyberd/cosmos/poc/app/storage" | ||
| ) | ||
|
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| /* | ||
| #cgo CFLAGS: -I.3 | ||
| #cgo LDFLAGS: -L. -lrank | ||
| #cgo LDFLAGS: -lcudart | ||
| #include "rank.h" | ||
| */ | ||
| import "C" | ||
|
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| func calculateRankGPU(data *InMemoryStorage) ([]float64, int) { | ||
| stakes := []uint64{3, 1, 2} | ||
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| inLinksCount := []uint32{0, 0, 1, 5, 4, 0, 1, 0} | ||
| inLinksStartIndex := []uint64{0, 0, 0, 1, 6, 10, 10, 11} | ||
| outLinksCount := []uint32{2, 2, 1, 1, 3, 1, 0, 1} | ||
| outLinksStartIndex := []uint64{0, 2, 4, 5, 6, 9, 10, 10} | ||
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| inLinksOuts := []uint64{7, 1, 4, 4, 4, 2, 5, 0, 0, 1, 3} | ||
| inLinksUsers := []uint64{0, 2, 0, 1, 2, 0, 1, 1, 2, 1, 1} | ||
| outLinksUsers := []uint64{1, 2, 1, 2, 0, 1, 0, 1, 2, 1, 0} | ||
|
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| /* --- Convert to C ------------------------------- */ | ||
| cStakesSize := C.ulong(len(stakes)) | ||
| cCidsSize := C.ulong(len(inLinksStartIndex)) | ||
| cLinksSize := C.ulong(len(inLinksOuts)) | ||
|
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| cStakes := (*C.ulong)(&stakes[0]) | ||
|
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| cInLinksStartIndex := (*C.ulong)(&inLinksStartIndex[0]) | ||
| cInLinksCount := (*C.uint)(&inLinksCount[0]) | ||
|
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| cOutLinksStartIndex := (*C.ulong)(&outLinksStartIndex[0]) | ||
| cOutLinksCount := (*C.uint)(&outLinksCount[0]) | ||
|
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| cInLinksOuts := (*C.ulong)(&inLinksOuts[0]) | ||
| cInLinksUsers := (*C.ulong)(&inLinksUsers[0]) | ||
| cOutLinksUsers := (*C.ulong)(&outLinksUsers[0]) | ||
|
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| /* --- Init rank ---------------------------------- */ | ||
| rank := make([]float64, len(inLinksStartIndex)) | ||
| cRank := (*C.double)(&rank[0]) | ||
| /* --- Run Computation ---------------------------- */ | ||
| fmt.Printf("Invoking cuda library...\n") | ||
| C.calculate_rank( | ||
| cStakes, cStakesSize, cCidsSize, cLinksSize, | ||
| cInLinksStartIndex, cInLinksCount, | ||
| cOutLinksStartIndex, cOutLinksCount, | ||
| cInLinksOuts, cInLinksUsers, cOutLinksUsers, | ||
| cRank, | ||
| ) | ||
| return rank, 0 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| #include <stdint.h> | ||
|
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| void calculate_rank( | ||
| uint64_t *stakes, uint64_t stakesSize, /* User stakes and corresponding array size */ | ||
| uint64_t cidsSize, uint64_t linksSize, /* Cids count */ | ||
| uint64_t *inLinksStartIndex, uint32_t *inLinksCount, /* array index - cid index*/ | ||
| uint64_t *outLinksStartIndex, uint32_t *outLinksCount, /* array index - cid index*/ | ||
| uint64_t *inLinksOuts, uint64_t *inLinksUsers, /*all incoming links from all users*/ | ||
| uint64_t *outLinksUsers, /*all outgoing links from all users*/ | ||
| double *rank /* array index - cid index*/ | ||
| ); |
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