mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-23 13:30:23 +00:00
292 lines
8.2 KiB
Go
292 lines
8.2 KiB
Go
/*
|
|
*
|
|
* Copyright 2017 gRPC 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.
|
|
*
|
|
*/
|
|
|
|
package stats
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"math"
|
|
"sort"
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
// Features contains most fields for a benchmark
|
|
type Features struct {
|
|
NetworkMode string
|
|
EnableTrace bool
|
|
Latency time.Duration
|
|
Kbps int
|
|
Mtu int
|
|
MaxConcurrentCalls int
|
|
ReqSizeBytes int
|
|
RespSizeBytes int
|
|
EnableCompressor bool
|
|
}
|
|
|
|
// String returns the textual output of the Features as string.
|
|
func (f Features) String() string {
|
|
return fmt.Sprintf("traceMode_%t-latency_%s-kbps_%#v-MTU_%#v-maxConcurrentCalls_"+
|
|
"%#v-reqSize_%#vB-respSize_%#vB-Compressor_%t", f.EnableTrace,
|
|
f.Latency.String(), f.Kbps, f.Mtu, f.MaxConcurrentCalls, f.ReqSizeBytes, f.RespSizeBytes, f.EnableCompressor)
|
|
}
|
|
|
|
// PartialPrintString can print certain features with different format.
|
|
func PartialPrintString(noneEmptyPos []bool, f Features, shared bool) string {
|
|
s := ""
|
|
var (
|
|
prefix, suffix, linker string
|
|
isNetwork bool
|
|
)
|
|
if shared {
|
|
suffix = "\n"
|
|
linker = ": "
|
|
} else {
|
|
prefix = "-"
|
|
linker = "_"
|
|
}
|
|
if noneEmptyPos[0] {
|
|
s += fmt.Sprintf("%sTrace%s%t%s", prefix, linker, f.EnableCompressor, suffix)
|
|
}
|
|
if shared && f.NetworkMode != "" {
|
|
s += fmt.Sprintf("Network: %s \n", f.NetworkMode)
|
|
isNetwork = true
|
|
}
|
|
if !isNetwork {
|
|
if noneEmptyPos[1] {
|
|
s += fmt.Sprintf("%slatency%s%s%s", prefix, linker, f.Latency.String(), suffix)
|
|
}
|
|
if noneEmptyPos[2] {
|
|
s += fmt.Sprintf("%skbps%s%#v%s", prefix, linker, f.Kbps, suffix)
|
|
}
|
|
if noneEmptyPos[3] {
|
|
s += fmt.Sprintf("%sMTU%s%#v%s", prefix, linker, f.Mtu, suffix)
|
|
}
|
|
}
|
|
if noneEmptyPos[4] {
|
|
s += fmt.Sprintf("%sCallers%s%#v%s", prefix, linker, f.MaxConcurrentCalls, suffix)
|
|
}
|
|
if noneEmptyPos[5] {
|
|
s += fmt.Sprintf("%sreqSize%s%#vB%s", prefix, linker, f.ReqSizeBytes, suffix)
|
|
}
|
|
if noneEmptyPos[6] {
|
|
s += fmt.Sprintf("%srespSize%s%#vB%s", prefix, linker, f.RespSizeBytes, suffix)
|
|
}
|
|
if noneEmptyPos[7] {
|
|
s += fmt.Sprintf("%sCompressor%s%t%s", prefix, linker, f.EnableCompressor, suffix)
|
|
}
|
|
return s
|
|
}
|
|
|
|
type percentLatency struct {
|
|
Percent int
|
|
Value time.Duration
|
|
}
|
|
|
|
// BenchResults records features and result of a benchmark.
|
|
type BenchResults struct {
|
|
RunMode string
|
|
Features Features
|
|
Latency []percentLatency
|
|
Operations int
|
|
NsPerOp int64
|
|
AllocedBytesPerOp int64
|
|
AllocsPerOp int64
|
|
SharedPosion []bool
|
|
}
|
|
|
|
// SetBenchmarkResult sets features of benchmark and basic results.
|
|
func (stats *Stats) SetBenchmarkResult(mode string, features Features, o int, allocdBytes, allocs int64, sharedPos []bool) {
|
|
stats.result.RunMode = mode
|
|
stats.result.Features = features
|
|
stats.result.Operations = o
|
|
stats.result.AllocedBytesPerOp = allocdBytes
|
|
stats.result.AllocsPerOp = allocs
|
|
stats.result.SharedPosion = sharedPos
|
|
}
|
|
|
|
// GetBenchmarkResults returns the result of the benchmark including features and result.
|
|
func (stats *Stats) GetBenchmarkResults() BenchResults {
|
|
return stats.result
|
|
}
|
|
|
|
// BenchString output latency stats as the format as time + unit.
|
|
func (stats *Stats) BenchString() string {
|
|
stats.maybeUpdate()
|
|
s := stats.result
|
|
res := s.RunMode + "-" + s.Features.String() + ": \n"
|
|
if len(s.Latency) != 0 {
|
|
var statsUnit = s.Latency[0].Value
|
|
var timeUnit = fmt.Sprintf("%v", statsUnit)[1:]
|
|
for i := 1; i < len(s.Latency)-1; i++ {
|
|
res += fmt.Sprintf("%d_Latency: %s %s \t", s.Latency[i].Percent,
|
|
strconv.FormatFloat(float64(s.Latency[i].Value)/float64(statsUnit), 'f', 4, 64), timeUnit)
|
|
}
|
|
res += fmt.Sprintf("Avg latency: %s %s \t",
|
|
strconv.FormatFloat(float64(s.Latency[len(s.Latency)-1].Value)/float64(statsUnit), 'f', 4, 64), timeUnit)
|
|
}
|
|
res += fmt.Sprintf("Count: %v \t", s.Operations)
|
|
res += fmt.Sprintf("%v Bytes/op\t", s.AllocedBytesPerOp)
|
|
res += fmt.Sprintf("%v Allocs/op\t", s.AllocsPerOp)
|
|
|
|
return res
|
|
}
|
|
|
|
// Stats is a simple helper for gathering additional statistics like histogram
|
|
// during benchmarks. This is not thread safe.
|
|
type Stats struct {
|
|
numBuckets int
|
|
unit time.Duration
|
|
min, max int64
|
|
histogram *Histogram
|
|
|
|
durations durationSlice
|
|
dirty bool
|
|
|
|
sortLatency bool
|
|
result BenchResults
|
|
}
|
|
|
|
type durationSlice []time.Duration
|
|
|
|
// NewStats creates a new Stats instance. If numBuckets is not positive,
|
|
// the default value (16) will be used.
|
|
func NewStats(numBuckets int) *Stats {
|
|
if numBuckets <= 0 {
|
|
numBuckets = 16
|
|
}
|
|
return &Stats{
|
|
// Use one more bucket for the last unbounded bucket.
|
|
numBuckets: numBuckets + 1,
|
|
durations: make(durationSlice, 0, 100000),
|
|
}
|
|
}
|
|
|
|
// Add adds an elapsed time per operation to the stats.
|
|
func (stats *Stats) Add(d time.Duration) {
|
|
stats.durations = append(stats.durations, d)
|
|
stats.dirty = true
|
|
}
|
|
|
|
// Clear resets the stats, removing all values.
|
|
func (stats *Stats) Clear() {
|
|
stats.durations = stats.durations[:0]
|
|
stats.histogram = nil
|
|
stats.dirty = false
|
|
stats.result = BenchResults{}
|
|
}
|
|
|
|
//Sort method for durations
|
|
func (a durationSlice) Len() int { return len(a) }
|
|
func (a durationSlice) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
|
|
func (a durationSlice) Less(i, j int) bool { return a[i] < a[j] }
|
|
func max(a, b int64) int64 {
|
|
if a > b {
|
|
return a
|
|
}
|
|
return b
|
|
}
|
|
|
|
// maybeUpdate updates internal stat data if there was any newly added
|
|
// stats since this was updated.
|
|
func (stats *Stats) maybeUpdate() {
|
|
if !stats.dirty {
|
|
return
|
|
}
|
|
|
|
if stats.sortLatency {
|
|
sort.Sort(stats.durations)
|
|
stats.min = int64(stats.durations[0])
|
|
stats.max = int64(stats.durations[len(stats.durations)-1])
|
|
}
|
|
|
|
stats.min = math.MaxInt64
|
|
stats.max = 0
|
|
for _, d := range stats.durations {
|
|
if stats.min > int64(d) {
|
|
stats.min = int64(d)
|
|
}
|
|
if stats.max < int64(d) {
|
|
stats.max = int64(d)
|
|
}
|
|
}
|
|
|
|
// Use the largest unit that can represent the minimum time duration.
|
|
stats.unit = time.Nanosecond
|
|
for _, u := range []time.Duration{time.Microsecond, time.Millisecond, time.Second} {
|
|
if stats.min <= int64(u) {
|
|
break
|
|
}
|
|
stats.unit = u
|
|
}
|
|
|
|
numBuckets := stats.numBuckets
|
|
if n := int(stats.max - stats.min + 1); n < numBuckets {
|
|
numBuckets = n
|
|
}
|
|
stats.histogram = NewHistogram(HistogramOptions{
|
|
NumBuckets: numBuckets,
|
|
// max-min(lower bound of last bucket) = (1 + growthFactor)^(numBuckets-2) * baseBucketSize.
|
|
GrowthFactor: math.Pow(float64(stats.max-stats.min), 1/float64(numBuckets-2)) - 1,
|
|
BaseBucketSize: 1.0,
|
|
MinValue: stats.min})
|
|
|
|
for _, d := range stats.durations {
|
|
stats.histogram.Add(int64(d))
|
|
}
|
|
|
|
stats.dirty = false
|
|
|
|
if stats.durations.Len() != 0 {
|
|
var percentToObserve = []int{50, 90, 99}
|
|
// First data record min unit from the latency result.
|
|
stats.result.Latency = append(stats.result.Latency, percentLatency{Percent: -1, Value: stats.unit})
|
|
for _, position := range percentToObserve {
|
|
stats.result.Latency = append(stats.result.Latency, percentLatency{Percent: position, Value: stats.durations[max(stats.histogram.Count*int64(position)/100-1, 0)]})
|
|
}
|
|
// Last data record the average latency.
|
|
avg := float64(stats.histogram.Sum) / float64(stats.histogram.Count)
|
|
stats.result.Latency = append(stats.result.Latency, percentLatency{Percent: -1, Value: time.Duration(avg)})
|
|
}
|
|
}
|
|
|
|
// SortLatency blocks the output
|
|
func (stats *Stats) SortLatency() {
|
|
stats.sortLatency = true
|
|
}
|
|
|
|
// Print writes textual output of the Stats.
|
|
func (stats *Stats) Print(w io.Writer) {
|
|
stats.maybeUpdate()
|
|
if stats.histogram == nil {
|
|
fmt.Fprint(w, "Histogram (empty)\n")
|
|
} else {
|
|
fmt.Fprintf(w, "Histogram (unit: %s)\n", fmt.Sprintf("%v", stats.unit)[1:])
|
|
stats.histogram.PrintWithUnit(w, float64(stats.unit))
|
|
}
|
|
}
|
|
|
|
// String returns the textual output of the Stats as string.
|
|
func (stats *Stats) String() string {
|
|
var b bytes.Buffer
|
|
stats.Print(&b)
|
|
return b.String()
|
|
}
|