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speedtest.go
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speedtest.go
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"fmt"
"net/url"
"runtime"
"sort"
"time"
"github.com/minio/dperf/pkg/dperf"
"github.com/minio/madmin-go"
)
const speedTest = "speedtest"
type speedTestOpts struct {
objectSize int
concurrencyStart int
concurrency int
duration time.Duration
autotune bool
storageClass string
bucketName string
}
// Get the max throughput and iops numbers.
func objectSpeedTest(ctx context.Context, opts speedTestOpts) chan madmin.SpeedTestResult {
ch := make(chan madmin.SpeedTestResult, 1)
go func() {
defer close(ch)
concurrency := opts.concurrencyStart
if opts.autotune {
// if we have less drives than concurrency then choose
// only the concurrency to be number of drives to start
// with - since default '32' might be big and may not
// complete in total time of 10s.
if globalEndpoints.NEndpoints() < concurrency {
concurrency = globalEndpoints.NEndpoints()
}
// Check if we have local disks per pool less than
// the concurrency make sure we choose only the "start"
// concurrency to be equal to the lowest number of
// local disks per server.
for _, localDiskCount := range globalEndpoints.NLocalDisksPathsPerPool() {
if localDiskCount < concurrency {
concurrency = localDiskCount
}
}
// Any concurrency less than '4' just stick to '4' concurrent
// operations for now to begin with.
if concurrency < 4 {
concurrency = 4
}
// if GOMAXPROCS is set to a lower value then choose to use
// concurrency == GOMAXPROCS instead.
if runtime.GOMAXPROCS(0) < concurrency {
concurrency = runtime.GOMAXPROCS(0)
}
}
throughputHighestGet := uint64(0)
throughputHighestPut := uint64(0)
var throughputHighestResults []SpeedTestResult
sendResult := func() {
var result madmin.SpeedTestResult
durationSecs := opts.duration.Seconds()
result.GETStats.ThroughputPerSec = throughputHighestGet / uint64(durationSecs)
result.GETStats.ObjectsPerSec = throughputHighestGet / uint64(opts.objectSize) / uint64(durationSecs)
result.PUTStats.ThroughputPerSec = throughputHighestPut / uint64(durationSecs)
result.PUTStats.ObjectsPerSec = throughputHighestPut / uint64(opts.objectSize) / uint64(durationSecs)
var totalUploadTimes madmin.TimeDurations
var totalDownloadTimes madmin.TimeDurations
var totalDownloadTTFB madmin.TimeDurations
for i := 0; i < len(throughputHighestResults); i++ {
errStr := ""
if throughputHighestResults[i].Error != "" {
errStr = throughputHighestResults[i].Error
}
// if the default concurrency yields zero results, throw an error.
if throughputHighestResults[i].Downloads == 0 && opts.concurrencyStart == concurrency {
errStr = fmt.Sprintf("no results for downloads upon first attempt, concurrency %d and duration %s", opts.concurrencyStart, opts.duration)
}
// if the default concurrency yields zero results, throw an error.
if throughputHighestResults[i].Uploads == 0 && opts.concurrencyStart == concurrency {
errStr = fmt.Sprintf("no results for uploads upon first attempt, concurrency %d and duration %s", opts.concurrencyStart, opts.duration)
}
result.PUTStats.Servers = append(result.PUTStats.Servers, madmin.SpeedTestStatServer{
Endpoint: throughputHighestResults[i].Endpoint,
ThroughputPerSec: throughputHighestResults[i].Uploads / uint64(durationSecs),
ObjectsPerSec: throughputHighestResults[i].Uploads / uint64(opts.objectSize) / uint64(durationSecs),
Err: errStr,
})
result.GETStats.Servers = append(result.GETStats.Servers, madmin.SpeedTestStatServer{
Endpoint: throughputHighestResults[i].Endpoint,
ThroughputPerSec: throughputHighestResults[i].Downloads / uint64(durationSecs),
ObjectsPerSec: throughputHighestResults[i].Downloads / uint64(opts.objectSize) / uint64(durationSecs),
Err: errStr,
})
totalUploadTimes = append(totalUploadTimes, throughputHighestResults[i].UploadTimes...)
totalDownloadTimes = append(totalDownloadTimes, throughputHighestResults[i].DownloadTimes...)
totalDownloadTTFB = append(totalDownloadTTFB, throughputHighestResults[i].DownloadTTFB...)
}
result.PUTStats.Response = totalUploadTimes.Measure()
result.GETStats.Response = totalDownloadTimes.Measure()
result.GETStats.TTFB = totalDownloadTTFB.Measure()
result.Size = opts.objectSize
result.Disks = globalEndpoints.NEndpoints()
result.Servers = len(globalNotificationSys.peerClients) + 1
result.Version = Version
result.Concurrent = concurrency
select {
case ch <- result:
case <-ctx.Done():
return
}
}
for {
select {
case <-ctx.Done():
// If the client got disconnected stop the speedtest.
return
default:
}
sopts := speedTestOpts{
objectSize: opts.objectSize,
concurrency: concurrency,
duration: opts.duration,
storageClass: opts.storageClass,
bucketName: opts.bucketName,
}
results := globalNotificationSys.SpeedTest(ctx, sopts)
sort.Slice(results, func(i, j int) bool {
return results[i].Endpoint < results[j].Endpoint
})
totalPut := uint64(0)
totalGet := uint64(0)
for _, result := range results {
totalPut += result.Uploads
totalGet += result.Downloads
}
if totalGet < throughputHighestGet {
// Following check is for situations
// when Writes() scale higher than Reads()
// - practically speaking this never happens
// and should never happen - however it has
// been seen recently due to hardware issues
// causes Reads() to go slower than Writes().
//
// Send such results anyways as this shall
// expose a problem underneath.
if totalPut > throughputHighestPut {
throughputHighestResults = results
throughputHighestPut = totalPut
// let the client see lower value as well
throughputHighestGet = totalGet
}
sendResult()
break
}
// We break if we did not see 2.5% growth rate in total GET
// requests, we have reached our peak at this point.
doBreak := float64(totalGet-throughputHighestGet)/float64(totalGet) < 0.025
throughputHighestGet = totalGet
throughputHighestResults = results
throughputHighestPut = totalPut
if doBreak {
sendResult()
break
}
for _, result := range results {
if result.Error != "" {
// Break out on errors.
sendResult()
return
}
}
sendResult()
if !opts.autotune {
break
}
// Try with a higher concurrency to see if we get better throughput
concurrency += (concurrency + 1) / 2
}
}()
return ch
}
func driveSpeedTest(ctx context.Context, opts madmin.DriveSpeedTestOpts) madmin.DriveSpeedTestResult {
perf := &dperf.DrivePerf{
Serial: opts.Serial,
BlockSize: opts.BlockSize,
FileSize: opts.FileSize,
}
localPaths := globalEndpoints.LocalDisksPaths()
paths := func() (tmpPaths []string) {
for _, lp := range localPaths {
tmpPaths = append(tmpPaths, pathJoin(lp, minioMetaTmpBucket))
}
return tmpPaths
}()
scheme := "http"
if globalIsTLS {
scheme = "https"
}
u := &url.URL{
Scheme: scheme,
Host: globalLocalNodeName,
}
perfs, err := perf.Run(ctx, paths...)
return madmin.DriveSpeedTestResult{
Endpoint: u.String(),
Version: Version,
DrivePerf: func() (results []madmin.DrivePerf) {
for idx, r := range perfs {
result := madmin.DrivePerf{
Path: localPaths[idx],
ReadThroughput: r.ReadThroughput,
WriteThroughput: r.WriteThroughput,
Error: func() string {
if r.Error != nil {
return r.Error.Error()
}
return ""
}(),
}
results = append(results, result)
}
return results
}(),
Error: func() string {
if err != nil {
return err.Error()
}
return ""
}(),
}
}