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9aadd9114c
Avoid memory bloat in `benchmark encryption` and `benchmark crypto` commands Reuse the output buffer by resetting it between iterations. Fixes #4210
109 lines
3.3 KiB
Go
109 lines
3.3 KiB
Go
package cli
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import (
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"context"
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"sort"
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atunits "github.com/alecthomas/units"
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"github.com/kopia/kopia/internal/gather"
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"github.com/kopia/kopia/internal/timetrack"
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"github.com/kopia/kopia/internal/units"
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"github.com/kopia/kopia/repo/encryption"
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"github.com/kopia/kopia/repo/format"
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"github.com/kopia/kopia/repo/hashing"
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)
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type commandBenchmarkEncryption struct {
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blockSize atunits.Base2Bytes
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repeat int
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deprecatedAlgorithms bool
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optionPrint bool
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parallel int
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out textOutput
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}
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func (c *commandBenchmarkEncryption) setup(svc appServices, parent commandParent) {
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cmd := parent.Command("encryption", "Run encryption benchmarks")
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cmd.Flag("block-size", "Size of a block to encrypt").Default("1MB").BytesVar(&c.blockSize)
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cmd.Flag("repeat", "Number of repetitions").Default("1000").IntVar(&c.repeat)
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cmd.Flag("deprecated", "Include deprecated algorithms").BoolVar(&c.deprecatedAlgorithms)
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cmd.Flag("parallel", "Number of parallel goroutines").Default("1").IntVar(&c.parallel)
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cmd.Flag("print-options", "Print out options usable for repository creation").BoolVar(&c.optionPrint)
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cmd.Action(svc.noRepositoryAction(c.run))
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c.out.setup(svc)
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}
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func (c *commandBenchmarkEncryption) run(ctx context.Context) error {
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results := c.runBenchmark(ctx)
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sort.Slice(results, func(i, j int) bool {
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return results[i].throughput > results[j].throughput
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})
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c.out.printStdout(" %-30v %v\n", "Encryption", "Throughput")
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c.out.printStdout("-----------------------------------------------------------------\n")
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for ndx, r := range results {
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c.out.printStdout("%3d. %-30v %v / second", ndx, r.encryption, units.BytesString(r.throughput))
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if c.optionPrint {
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c.out.printStdout(", --encryption=%s", r.encryption)
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}
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c.out.printStdout("\n")
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}
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c.out.printStdout("-----------------------------------------------------------------\n")
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c.out.printStdout("Fastest option for this machine is: --encryption=%s\n", results[0].encryption)
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return nil
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}
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func (c *commandBenchmarkEncryption) runBenchmark(ctx context.Context) []cryptoBenchResult {
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var results []cryptoBenchResult
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data := make([]byte, c.blockSize)
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for _, ea := range encryption.SupportedAlgorithms(c.deprecatedAlgorithms) {
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enc, err := encryption.CreateEncryptor(&format.ContentFormat{
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Encryption: ea,
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Hash: hashing.DefaultAlgorithm,
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MasterKey: make([]byte, 32), //nolint:mnd
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HMACSecret: make([]byte, 32), //nolint:mnd
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})
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if err != nil {
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continue
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}
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log(ctx).Infof("Benchmarking encryption '%v'... (%v x %v bytes, parallelism %v)", ea, c.repeat, len(data), c.parallel)
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input := gather.FromSlice(data)
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tt := timetrack.Start()
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hashCount := c.repeat
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runInParallelNoInputNoResult(c.parallel, func() {
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var hashOutput [hashing.MaxHashSize]byte
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var encryptOutput gather.WriteBuffer
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defer encryptOutput.Close()
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for range hashCount {
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encryptOutput.Reset()
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if encerr := enc.Encrypt(input, hashOutput[:32], &encryptOutput); encerr != nil {
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log(ctx).Errorf("encryption failed: %v", encerr)
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break
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}
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}
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})
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_, bytesPerSecond := tt.Completed(float64(c.parallel) * float64(len(data)) * float64(hashCount))
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results = append(results, cryptoBenchResult{hash: "-", encryption: ea, throughput: bytesPerSecond})
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}
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return results
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}
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