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// Copyright 2014 The Cockroach Authors.
//
// 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. See the AUTHORS file
// for names of contributors.
//
// Author: Tyler Neely (t@jujit.su)
package loghisto
import (
"fmt"
"os"
"runtime"
"text/tabwriter"
"time"
)
// PrintBenchmark will run the provided function at the specified
// concurrency, time the operation, and once per second write the
// following information to standard out:
//
// 2014-08-09 17:44:57 -0400 EDT
// raft_AppendLogEntries_count: 16488
// raft_AppendLogEntries_max: 3.982478339757623e+07
// raft_AppendLogEntries_99.99: 3.864778314316012e+07
// raft_AppendLogEntries_99.9: 3.4366224772310276e+06
// raft_AppendLogEntries_99: 2.0228126576114902e+06
// raft_AppendLogEntries_50: 469769.7083161708
// raft_AppendLogEntries_min: 129313.15075081984
// raft_AppendLogEntries_sum: 9.975892639594093e+09
// raft_AppendLogEntries_avg: 605039.5827022133
// raft_AppendLogEntries_agg_avg: 618937
// raft_AppendLogEntries_agg_count: 121095
// raft_AppendLogEntries_agg_sum: 7.4950269894e+10
// sys.Alloc: 997328
// sys.NumGC: 1115
// sys.PauseTotalNs: 2.94946542e+08
// sys.NumGoroutine: 26
func PrintBenchmark(name string, concurrency uint, op func()) {
runtime.GOMAXPROCS(runtime.NumCPU())
var ms = NewMetricSystem(time.Second, true)
mc := make(chan *ProcessedMetricSet, 1)
ms.SubscribeToProcessedMetrics(mc)
ms.Start()
defer ms.Stop()
go receiver(name, mc)
for i := uint(0); i < concurrency; i++ {
go func() {
for {
timer := ms.StartTimer(name)
op()
timer.Stop()
}
}()
}
<-make(chan struct{})
}
func receiver(name string, mc chan *ProcessedMetricSet) {
interesting := []string{
fmt.Sprintf("%s_count", name),
fmt.Sprintf("%s_max", name),
fmt.Sprintf("%s_99.99", name),
fmt.Sprintf("%s_99.9", name),
fmt.Sprintf("%s_99", name),
fmt.Sprintf("%s_95", name),
fmt.Sprintf("%s_90", name),
fmt.Sprintf("%s_75", name),
fmt.Sprintf("%s_50", name),
fmt.Sprintf("%s_min", name),
fmt.Sprintf("%s_sum", name),
fmt.Sprintf("%s_avg", name),
fmt.Sprintf("%s_agg_avg", name),
fmt.Sprintf("%s_agg_count", name),
fmt.Sprintf("%s_agg_sum", name),
"sys.Alloc",
"sys.NumGC",
"sys.PauseTotalNs",
"sys.NumGoroutine",
}
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 8, 0, '\t', 0)
for m := range mc {
fmt.Fprintln(w, m.Time)
for _, e := range interesting {
fmt.Fprintln(w, fmt.Sprintf("%s:\t", e), m.Metrics[e])
}
fmt.Fprintln(w)
w.Flush()
}
}
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