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package bolt
import (
"errors"
"fmt"
"os"
"sync"
"testing"
)
const (
BenchReadMode = "read"
BenchWriteMode = "write"
BenchSequentialTraversal = "sequential"
BenchRandomTraversal = "random"
)
type Benchmark struct {
InputPath string
ReadWriteMode string
TraversalPattern string
Parallelism int
}
func NewBenchmark(inputPath, readWriteMode, traversalPattern string, parallelism int) *Benchmark {
return &Benchmark{inputPath, readWriteMode, traversalPattern, parallelism}
}
func (bm *Benchmark) Run(b *testing.B) {
// Open the database.
db, err := Open(bm.InputPath, 0600)
if err != nil {
b.Fatalf("error: %+v", err)
return
}
defer db.Close()
buckets, err := buckets(db, bm.InputPath)
if err != nil {
b.Fatalf("error: %+v", err)
}
b.ResetTimer()
// Keep running a fixed number of parallel reads until we run out of time.
for i := 0; i < b.N; i++ {
var wg sync.WaitGroup
for j := 0; j < bm.Parallelism; j++ {
wg.Add(1)
go func() {
defer wg.Done()
if err := bm.runBuckets(b, db, buckets); err != nil {
b.Fatalf("error: %+v", err)
}
}()
}
wg.Wait()
}
}
// Run benchmark(s) for each of the given buckets.
func (bm *Benchmark) runBuckets(b *testing.B, db *DB, buckets []string) error {
return db.View(func(tx *Tx) error {
bucketsCount := len(buckets)
for _, bucket := range buckets {
c := tx.Bucket([]byte(bucket)).Cursor()
count := 0
for k, _ := c.First(); k != nil; k, _ = c.Next() {
count++
}
if count != bucketsCount {
return errors.New(fmt.Sprintf("wrong count: %d; expected: %d", count, bucketsCount))
}
}
return nil
})
}
func buckets(db *DB, path string) ([]string, error) {
if _, err := os.Stat(path); os.IsNotExist(err) {
return nil, err
}
buckets := []string{}
err := db.View(func(tx *Tx) error {
// Iterate over each bucket.
return tx.ForEach(func(name []byte, _ *Bucket) error {
buckets = append(buckets, string(name))
return nil
})
})
return buckets, err
}
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