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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library 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 Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package main
import (
"flag"
"log"
"math"
"math/rand"
"net/http"
_ "net/http/pprof"
"os"
"runtime"
"runtime/pprof"
"time"
"github.com/dexon-foundation/dexon-consensus/core"
"github.com/dexon-foundation/dexon-consensus/core/test"
integration "github.com/dexon-foundation/dexon-consensus/integration_test"
"github.com/dexon-foundation/dexon-consensus/simulation/config"
)
var (
configFile = flag.String("config", "", "path to simulation config file")
cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`")
memprofile = flag.String("memprofile", "", "write memory profile to `file`")
)
func main() {
flag.Parse()
rand.Seed(time.Now().UnixNano())
// Supports runtime pprof monitoring.
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()
if *configFile == "" {
log.Fatal("error: no configuration file specified")
}
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal("could not create CPU profile: ", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
log.Fatal("could not start CPU profile: ", err)
}
defer pprof.StopCPUProfile()
}
cfg, err := config.Read(*configFile)
if err != nil {
log.Fatal("unable to read config: ", err)
}
// Setup latencies, nodes.
networkLatency := &test.NormalLatencyModel{
Sigma: cfg.Networking.Sigma,
Mean: cfg.Networking.Mean,
}
proposingLatency := &test.NormalLatencyModel{
Sigma: cfg.Node.Legacy.ProposeIntervalSigma,
Mean: cfg.Node.Legacy.ProposeIntervalMean,
}
// Setup key pairs.
prvKeys, pubKeys, err := test.NewKeys(int(cfg.Node.Num))
if err != nil {
log.Fatal("could not setup key pairs: ", err)
}
// Setup governance instance.
gov, err := test.NewGovernance(
pubKeys,
time.Duration(cfg.Networking.Mean)*time.Millisecond,
core.ConfigRoundShift)
if err != nil {
log.Fatal("could not setup governance: ", err)
}
// Setup nodes and other consensus related stuffs.
nodes, err := integration.PrepareNodes(
gov, prvKeys, uint32(cfg.Node.Num), networkLatency, proposingLatency)
if err != nil {
log.Fatal("could not setup nodes: ", err)
}
apps, dbs := integration.CollectAppAndDBFromNodes(nodes)
blockPerNode := int(math.Ceil(
float64(cfg.Node.MaxBlock) / float64(cfg.Node.Num)))
sch := test.NewScheduler(
test.NewStopByConfirmedBlocks(blockPerNode, apps, dbs))
now := time.Now().UTC()
for _, v := range nodes {
v.Bootstrap(sch, now)
}
// Run the simulation.
sch.Run(cfg.Scheduler.WorkerNum)
if err = integration.VerifyApps(apps); err != nil {
log.Fatal("consensus result is not incorrect: ", err)
}
// Prepare statistics.
stats, err := integration.NewStats(sch.CloneExecutionHistory(), apps)
if err != nil {
log.Fatal("could not generate statistics: ", err)
}
if *memprofile != "" {
f, err := os.Create(*memprofile)
if err != nil {
log.Fatal("could not create memory profile: ", err)
}
runtime.GC() // get up-to-date statistics
if err := pprof.WriteHeapProfile(f); err != nil {
log.Fatal("could not write memory profile: ", err)
}
f.Close()
}
log.Printf("BPS: %v\n", stats.BPS)
log.Printf("ExecutionTime: %v\n", stats.ExecutionTime)
log.Printf("Prepare: %v\n", time.Duration(stats.All.PrepareExecLatency))
log.Printf("Process: %v\n", time.Duration(stats.All.ProcessExecLatency))
}
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