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Add loadtest hammer operation to the client (google#946)
* Hammer with QPS graph * wip: client operation * Update default parameters * fixups * Silence logging before parse errors * Update server URL * reviewer edits
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| // Copyright 2018 Google Inc. All Rights Reserved. | ||
| // | ||
| // 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. | ||
|
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| package cmd | ||
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||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "flag" | ||
| "fmt" | ||
| "log" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/google/keytransparency/core/authentication" | ||
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| "github.com/aybabtme/uniplot/histogram" | ||
| "github.com/paulbellamy/ratecounter" | ||
| "github.com/spf13/cobra" | ||
| "github.com/spf13/pflag" | ||
| "github.com/spf13/viper" | ||
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| tm "github.com/buger/goterm" | ||
| tpb "github.com/google/keytransparency/core/api/type/type_proto" | ||
| ) | ||
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|
||
| var ( | ||
| maxWorkers uint | ||
| workers uint | ||
| memLog = new(bytes.Buffer) | ||
| ramp time.Duration | ||
| ) | ||
|
|
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| func init() { | ||
| // Silence "logging before flag.Parse" | ||
| pflag.CommandLine.AddGoFlagSet(flag.CommandLine) | ||
| flag.CommandLine.Parse([]string{}) | ||
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| log.SetOutput(memLog) | ||
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| RootCmd.AddCommand(hammerCmd) | ||
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| hammerCmd.Flags().UintVar(&maxWorkers, "workers", 1, "Number of parallel workers") | ||
| hammerCmd.Flags().DurationVar(&ramp, "ramp", 1*time.Second, "Time to spend ramping up") | ||
| } | ||
|
|
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| // hammerCmd represents the post command | ||
| var hammerCmd = &cobra.Command{ | ||
| Use: "hammer", | ||
| Short: "Loadtest the server", | ||
| Long: `Sends update requests for user_1 through user_n using a select number of workers in parallel.`, | ||
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| PreRun: func(cmd *cobra.Command, args []string) { | ||
| if err := readKeyStoreFile(); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| }, | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| ctx := context.Background() | ||
| runHammer(ctx, maxWorkers, ramp) | ||
| return nil | ||
| }, | ||
| } | ||
|
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| // runHammer adds workers up to maxWorkers over the ramp time. | ||
| func runHammer(ctx context.Context, maxWorkers uint, ramp time.Duration) { | ||
| rampDelta := ramp / time.Duration(maxWorkers) | ||
| times := make(chan time.Duration) | ||
| jobs := make(chan job) | ||
| var wg sync.WaitGroup | ||
| go recordLatencies(ctx, times, rampDelta) | ||
| go generateJobs(ctx, jobs) | ||
|
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| // Slowly add workers up to maxWorkers | ||
| rampTicker := time.NewTicker(rampDelta) | ||
| for ; workers < maxWorkers && ctx.Err() == nil; <-rampTicker.C { | ||
| workers++ | ||
| wg.Add(1) | ||
| go worker(ctx, workers, jobs, times, &wg) | ||
| } | ||
| rampTicker.Stop() | ||
| wg.Wait() | ||
| } | ||
|
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| type job func() error | ||
|
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| func generateJobs(ctx context.Context, jobs chan<- job) { | ||
| i := 0 | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case jobs <- bindJob(ctx, i): | ||
| i++ | ||
| } | ||
| } | ||
| } | ||
|
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| func bindJob(ctx context.Context, i int) func() error { | ||
| userID := fmt.Sprintf("user_%v", i) | ||
| return func() error { | ||
| return writeOp(ctx, "app1", userID) | ||
| } | ||
| } | ||
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| func worker(ctx context.Context, id uint, jobs <-chan job, times chan<- time.Duration, wg *sync.WaitGroup) { | ||
| defer wg.Done() | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case f := <-jobs: | ||
| start := time.Now() | ||
| if err := f(); err != nil { | ||
| log.Printf("f(): %v", err) | ||
| continue | ||
| } | ||
| times <- time.Since(start) | ||
| } | ||
| } | ||
| } | ||
|
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| func recordLatencies(ctx context.Context, times <-chan time.Duration, rampDelta time.Duration) { | ||
| latencies := make([]float64, 0, 1000) | ||
| refresh := time.NewTicker(250 * time.Millisecond) | ||
| newWorker := time.NewTicker(rampDelta) | ||
| qps := ratecounter.NewRateCounter(rampDelta) | ||
|
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| qpsData := new(tm.DataTable) | ||
| qpsData.AddColumn("Workers") | ||
| qpsData.AddColumn("QPS") | ||
| qpsData.AddRow(0, 0) | ||
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| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case t := <-times: | ||
| latencies = append(latencies, t.Seconds()) | ||
| qps.Incr(1) | ||
| case <-refresh.C: | ||
| draw(latencies, qpsData, qps.Rate()) | ||
| case <-newWorker.C: | ||
| qpsData.AddRow(float64(workers), float64(qps.Rate())) | ||
| } | ||
| } | ||
| } | ||
|
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| func draw(latencies []float64, data *tm.DataTable, qps int64) { | ||
| tm.Clear() | ||
| tm.MoveCursor(0, 0) | ||
|
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| // Global stats | ||
| tm.Printf("Workers: %v\n", workers) | ||
| tm.Printf("Total Requests: %v\n", len(latencies)) | ||
| tm.Printf("Recent QPS: %v\n", qps) | ||
|
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| // Threads per QPS graph | ||
| tm.Printf("QPS Chart:\n") | ||
| chart := tm.NewLineChart(100, 20) | ||
| tm.Println(chart.Draw(data)) | ||
|
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| // Console output | ||
| tm.Printf("Debug Output:\n") | ||
| box := tm.NewBox(180, 10, 0) | ||
| box.Write(memLog.Bytes()) | ||
| tm.Println(box) | ||
|
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| // Latency Hist | ||
| width := 50 | ||
| height := 10 | ||
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| tm.Printf("Latency Histogram:\n") | ||
| hist := histogram.Hist(height, latencies) | ||
| histogram.Fprint(tm.Output, hist, histogram.Linear(width)) | ||
|
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| tm.Flush() | ||
| } | ||
|
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| // writeOp performs one write command and returns the time it took to complete. | ||
| func writeOp(ctx context.Context, appID, userID string) error { | ||
| timeout := viper.GetDuration("timeout") | ||
| ctx, cancel := context.WithTimeout(ctx, timeout) | ||
| defer cancel() | ||
|
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| userCreds := authentication.GetFakeCredential(userID) | ||
| c, err := GetClient(ctx, userCreds) | ||
| if err != nil { | ||
| return fmt.Errorf("error connecting: %v", err) | ||
| } | ||
|
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| signers := store.Signers() | ||
| authorizedKeys, err := store.PublicKeys() | ||
| if err != nil { | ||
| return fmt.Errorf("store.PublicKeys() failed: %v", err) | ||
| } | ||
| if err != nil { | ||
| return fmt.Errorf("updateKeys() failed: %v", err) | ||
| } | ||
| u := &tpb.User{ | ||
| DomainId: viper.GetString("domain"), | ||
| AppId: appID, | ||
| UserId: userID, | ||
| PublicKeyData: []byte("publickey"), | ||
| AuthorizedKeys: authorizedKeys, | ||
| } | ||
| _, err = c.Update(ctx, u, signers) | ||
| return err | ||
| } |
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