2020-10-26 07:31:24 -07:00
|
|
|
// Copyright © 2020 Attestant Limited.
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
//
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
//
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
// limitations under the License.
|
|
|
|
|
|
|
|
package util_test
|
|
|
|
|
|
|
|
import (
|
|
|
|
"crypto/rand"
|
|
|
|
"crypto/sha256"
|
|
|
|
"sync"
|
|
|
|
"testing"
|
|
|
|
|
2021-02-15 02:12:02 -08:00
|
|
|
"github.com/attestantio/vouch/util"
|
2020-10-26 07:31:24 -07:00
|
|
|
log "github.com/sirupsen/logrus"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
|
|
)
|
|
|
|
|
|
|
|
var input [][]byte
|
|
|
|
|
|
|
|
const (
|
|
|
|
benchmarkElements = 65536
|
|
|
|
benchmarkElementSize = 32
|
|
|
|
benchmarkHashRuns = 128
|
|
|
|
)
|
|
|
|
|
|
|
|
func init() {
|
|
|
|
input = make([][]byte, benchmarkElements)
|
|
|
|
for i := 0; i < benchmarkElements; i++ {
|
|
|
|
input[i] = make([]byte, benchmarkElementSize)
|
|
|
|
_, err := rand.Read(input[i])
|
|
|
|
if err != nil {
|
|
|
|
log.WithError(err).Debug("Cannot read from rand")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// hash is a simple worker function that carries out repeated hashging of its input to provide an output.
|
|
|
|
func hash(input [][]byte) [][]byte {
|
|
|
|
output := make([][]byte, len(input))
|
|
|
|
for i := range input {
|
|
|
|
copy(output, input)
|
|
|
|
for j := 0; j < benchmarkHashRuns; j++ {
|
|
|
|
hash := sha256.Sum256(output[i])
|
|
|
|
output[i] = hash[:]
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return output
|
|
|
|
}
|
|
|
|
|
|
|
|
func BenchmarkHash(b *testing.B) {
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
|
|
hash(input)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func BenchmarkHashMP(b *testing.B) {
|
|
|
|
output := make([][]byte, len(input))
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
|
|
workerResults, err := util.Scatter(len(input), func(offset int, entries int, _ *sync.RWMutex) (interface{}, error) {
|
|
|
|
return hash(input[offset : offset+entries]), nil
|
|
|
|
})
|
|
|
|
require.NoError(b, err)
|
|
|
|
for _, result := range workerResults {
|
|
|
|
copy(output[result.Offset:], result.Extent.([][]byte))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|