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/**
* Copyright 2016 Confluent Inc.
*
* 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 kafka
import (
"testing"
"time"
)
// ratepdisp tracks and prints message & byte rates
type ratedisp struct {
name string
start time.Time
lastPrint time.Time
every float64
cnt int64
size int64
b *testing.B
}
// ratedisp_start sets up a new rate displayer
func ratedispStart(b *testing.B, name string, every float64) (pf ratedisp) {
now := time.Now()
return ratedisp{name: name, start: now, lastPrint: now, b: b, every: every}
}
// reset start time and counters
func (rd *ratedisp) reset() {
rd.start = time.Now()
rd.cnt = 0
rd.size = 0
}
// print the current (accumulated) rate
func (rd *ratedisp) print(pfx string) {
elapsed := time.Since(rd.start).Seconds()
rd.b.Logf("%s: %s%d messages in %fs (%.0f msgs/s), %d bytes (%.3fMb/s)",
rd.name, pfx, rd.cnt, elapsed, float64(rd.cnt)/elapsed,
rd.size, (float64(rd.size)/elapsed)/(1024*1024))
}
// tick adds cnt of total size size to the rate displayer and also prints
// running stats every 1s.
func (rd *ratedisp) tick(cnt, size int64) {
rd.cnt += cnt
rd.size += size
if time.Since(rd.lastPrint).Seconds() >= rd.every {
rd.print("")
rd.lastPrint = time.Now()
}
}
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