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[#2] hrw: Add typed methods for hashers 

Add generic methods for sort-methods used in node

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
pull/4/head
Dmitrii Stepanov 2023-02-27 10:52:20 +03:00 committed by dstepanov-yadro
parent 9e9fc653e5
commit 5671632658
2 changed files with 165 additions and 0 deletions
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34
hrw.go
View File

@ -83,6 +83,17 @@ func SortSliceByValue(slice interface{}, hash uint64) {
}
}
// SortHasherSliceByValue receives []Hasher and hash to sort by value-distance.
func SortHasherSliceByValue[T Hasher](slice []T, hash uint64) {
rule := prepareHasherRule(slice)
if rule != nil {
swap := func(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
sortByDistance(len(rule), false, rule, hash, swap)
}
}
// SortSliceByWeightValue received []T, weights and hash to sort by value-distance * weights
func SortSliceByWeightValue(slice interface{}, weights []float64, hash uint64) {
rule := prepareRule(slice)
@ -92,6 +103,17 @@ func SortSliceByWeightValue(slice interface{}, weights []float64, hash uint64) {
}
}
// SortHasherSliceByWeightValue receives []Hasher, weights and hash to sort by value-distance * weights.
func SortHasherSliceByWeightValue[T Hasher](slice []T, weights []float64, hash uint64) {
rule := prepareHasherRule(slice)
if rule != nil {
swap := func(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
sortByWeight(len(slice), false, rule, weights, hash, swap)
}
}
// SortSliceByIndex received []T and hash to sort by index-distance
func SortSliceByIndex(slice interface{}, hash uint64) {
length := reflect.ValueOf(slice).Len()
@ -199,6 +221,18 @@ func prepareRule(slice interface{}) []uint64 {
return rule
}
func prepareHasherRule[T Hasher](hashers []T) []uint64 {
length := len(hashers)
if length == 0 {
return nil
}
result := make([]uint64, length)
for i := 0; i < length; i++ {
result[i] = hashers[i].Hash()
}
return result
}
// ValidateWeights checks if weights are normalized between 0.0 and 1.0
func ValidateWeights(weights []float64) error {
for i := range weights {

131
hrw_test.go
View File

@ -131,6 +131,23 @@ func TestSortSliceByValueHasher(t *testing.T) {
require.Equal(t, expect, actual)
}
func TestSortHasherSliceByValue(t *testing.T) {
actual := []hashString{"a", "b", "c", "d", "e", "f"}
expect := []hashString{"d", "f", "c", "b", "a", "e"}
hash := Hash(testKey)
SortHasherSliceByValue(actual, hash)
require.EqualValues(t, expect, actual)
}
func TestSortHasherSliceByWeightValue(t *testing.T) {
actual := []hashString{"a", "b", "c", "d", "e", "f"}
weights := []float64{1.0, 1.0, 1.0, 1.0, 1.0, 1.0}
expect := []hashString{"d", "f", "c", "b", "a", "e"}
hash := Hash(testKey)
SortHasherSliceByWeightValue(actual, weights, hash)
require.EqualValues(t, expect, actual)
}
func TestSortSliceByValueIntSlice(t *testing.T) {
cases := []slices{
{
@ -636,6 +653,36 @@ func BenchmarkSortByValue_fnv_1000(b *testing.B) {
benchmarkSortByValue(b, 1000, hash)
}
func BenchmarkSortHashersByValue_Reflection_fnv_10(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueReflection(b, 10, hash)
}
func BenchmarkSortHashersByValue_Reflection_fnv_100(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueReflection(b, 100, hash)
}
func BenchmarkSortHashersByValue_Reflection_fnv_1000(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueReflection(b, 1000, hash)
}
func BenchmarkSortHashersByValue_Typed_fnv_10(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueTyped(b, 10, hash)
}
func BenchmarkSortHashersByValue_Typed_fnv_100(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueTyped(b, 100, hash)
}
func BenchmarkSortHashersByValue_Typed_fnv_1000(b *testing.B) {
hash := Hash(testKey)
benchmarkSortHashersByValueTyped(b, 1000, hash)
}
func BenchmarkSortByWeight_fnv_10(b *testing.B) {
hash := Hash(testKey)
_ = benchmarkSortByWeight(b, 10, hash)
@ -681,6 +728,30 @@ func BenchmarkSortByWeightValue_fnv_1000(b *testing.B) {
benchmarkSortByWeightValue(b, 1000, hash)
}
func BenchmarkSortHashersByWeightValueReflection_fnv_10(b *testing.B) {
benchmarkSortHashersByWeightValueRelection(b, 10, Hash(testKey))
}
func BenchmarkSortHashersByWeightValueReflection_fnv_100(b *testing.B) {
benchmarkSortHashersByWeightValueRelection(b, 100, Hash(testKey))
}
func BenchmarkSortHashersByWeightValueReflection_fnv_1000(b *testing.B) {
benchmarkSortHashersByWeightValueRelection(b, 100, Hash(testKey))
}
func BenchmarkSortHashersByWeightValueTyped_fnv_10(b *testing.B) {
benchmarkSortHashersByWeightValueTyped(b, 10, Hash(testKey))
}
func BenchmarkSortHashersByWeightValueTyped_fnv_100(b *testing.B) {
benchmarkSortHashersByWeightValueTyped(b, 100, Hash(testKey))
}
func BenchmarkSortHashersByWeightValueTyped_fnv_1000(b *testing.B) {
benchmarkSortHashersByWeightValueTyped(b, 100, Hash(testKey))
}
func benchmarkSort(b *testing.B, n int, hash uint64) uint64 {
servers := make([]uint64, n)
for i := uint64(0); i < uint64(len(servers)); i++ {
@ -774,3 +845,63 @@ func benchmarkSortByWeightValue(b *testing.B, n int, hash uint64) {
SortSliceByWeightValue(servers, weights, hash)
}
}
func benchmarkSortHashersByWeightValueRelection(b *testing.B, n int, hash uint64) {
servers := make([]hashString, n)
weights := make([]float64, n)
for i := uint64(0); i < uint64(len(servers)); i++ {
weights[i] = float64(uint64(n)-i) / float64(n)
servers[i] = hashString("localhost:" + strconv.FormatUint(60000-i, 10))
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
SortSliceByWeightValue(servers, weights, hash)
}
}
func benchmarkSortHashersByWeightValueTyped(b *testing.B, n int, hash uint64) {
servers := make([]hashString, n)
weights := make([]float64, n)
for i := uint64(0); i < uint64(len(servers)); i++ {
weights[i] = float64(uint64(n)-i) / float64(n)
servers[i] = hashString("localhost:" + strconv.FormatUint(60000-i, 10))
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
SortHasherSliceByWeightValue(servers, weights, hash)
}
}
func benchmarkSortHashersByValueReflection(b *testing.B, n int, hash uint64) {
servers := make([]hashString, n)
for i := uint64(0); i < uint64(len(servers)); i++ {
servers[i] = hashString("localhost:" + strconv.FormatUint(60000-i, 10))
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
SortSliceByValue(servers, hash)
}
}
func benchmarkSortHashersByValueTyped(b *testing.B, n int, hash uint64) {
servers := make([]hashString, n)
for i := uint64(0); i < uint64(len(servers)); i++ {
servers[i] = hashString("localhost:" + strconv.FormatUint(60000-i, 10))
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
SortHasherSliceByValue(servers, hash)
}
}