/
stress.go
305 lines (274 loc) · 7.09 KB
/
stress.go
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package main
import (
"context"
"flag"
"fmt"
"io"
"log"
"os"
"runtime"
"runtime/pprof"
"sync"
"time"
"github.com/google/uuid"
"github.com/ovn-org/libovsdb/cache"
"github.com/ovn-org/libovsdb/client"
"github.com/ovn-org/libovsdb/model"
"github.com/ovn-org/libovsdb/ovsdb"
)
// ORMBridge is the simplified ORM model of the Bridge table
type bridgeType struct {
UUID string `ovsdb:"_uuid"`
Name string `ovsdb:"name"`
OtherConfig map[string]string `ovsdb:"other_config"`
ExternalIds map[string]string `ovsdb:"external_ids"`
Ports []string `ovsdb:"ports"`
Status map[string]string `ovsdb:"status"`
}
// ORMovs is the simplified ORM model of the Bridge table
type ovsType struct {
UUID string `ovsdb:"_uuid"`
Bridges []string `ovsdb:"bridges"`
}
var (
cpuprofile = flag.String("cpuprofile", "", "write cpu profile to this file")
memprofile = flag.String("memoryprofile", "", "write memory profile to this file")
nins = flag.Int("inserts", 100, "the number of insertions to make to the database (per client)")
nclients = flag.Int("clients", 1, "the number of clients to use")
parallel = flag.Bool("parallel", false, "run clients in parallel")
verbose = flag.Bool("verbose", false, "Be verbose")
connection = flag.String("ovsdb", "unix:/var/run/openvswitch/db.sock", "OVSDB connection string")
dbModel *model.DBModel
)
type result struct {
insertions int
deletions int
transactTime []time.Duration
cacheTime []time.Duration
}
func cleanup(ctx context.Context) {
ovs, err := client.NewOVSDBClient(dbModel, client.WithEndpoint(*connection))
if err != nil {
log.Fatal(err)
}
err = ovs.Connect(context.Background())
if err != nil {
log.Fatal(err)
}
defer ovs.Disconnect()
if _, err := ovs.MonitorAll(); err != nil {
log.Fatal(err)
}
var rootUUID string
// Get root UUID
for _, uuid := range ovs.Cache().Table("Open_vSwitch").Rows() {
rootUUID = uuid
log.Printf("rootUUID is %v", rootUUID)
}
// Remove all existing bridges
var bridges []bridgeType
if err := ovs.List(&bridges); err == nil {
log.Printf("%d existing bridges found", len(bridges))
for _, bridge := range bridges {
deleteBridge(ctx, ovs, rootUUID, &bridge)
}
} else {
if err != client.ErrNotFound {
log.Fatal(err)
}
}
}
func run(ctx context.Context, resultsChan chan result, wg *sync.WaitGroup) {
defer wg.Done()
result := result{}
ready := false
var rootUUID string
ovs, err := client.NewOVSDBClient(dbModel, client.WithEndpoint(*connection))
if err != nil {
log.Fatal(err)
}
err = ovs.Connect(context.Background())
if err != nil {
log.Fatal(err)
}
defer ovs.Disconnect()
var bridges []bridgeType
bridgeCh := make(map[string]chan bool)
for i := 0; i < *nins; i++ {
br := newBridge()
bridges = append(bridges, br)
bridgeCh[br.Name] = make(chan bool)
}
ovs.Cache().AddEventHandler(
&cache.EventHandlerFuncs{
AddFunc: func(table string, model model.Model) {
if ready && table == "Bridge" {
br := model.(*bridgeType)
var ch chan bool
var ok bool
if ch, ok = bridgeCh[br.Name]; !ok {
return
}
close(ch)
result.insertions++
}
},
DeleteFunc: func(table string, model model.Model) {
if table == "Bridge" {
result.deletions++
}
},
},
)
if _, err := ovs.MonitorAll(); err != nil {
log.Fatal(err)
}
// Get root UUID
for _, uuid := range ovs.Cache().Table("Open_vSwitch").Rows() {
rootUUID = uuid
if *verbose {
fmt.Printf("rootUUID is %v\n", rootUUID)
}
}
ready = true
cacheWg := sync.WaitGroup{}
for i := 0; i < *nins; i++ {
br := bridges[i]
ch := bridgeCh[br.Name]
log.Printf("create bridge: %s", br.Name)
cacheWg.Add(1)
go func(ctx context.Context, ch chan bool) {
defer cacheWg.Done()
<-ch
}(ctx, ch)
createBridge(ctx, ovs, rootUUID, br)
}
cacheWg.Wait()
resultsChan <- result
}
func transact(ctx context.Context, ovs client.Client, operations []ovsdb.Operation) (bool, string) {
reply, err := ovs.Transact(operations...)
if err != nil {
return false, ""
}
if _, err := ovsdb.CheckOperationResults(reply, operations); err != nil {
return false, ""
}
return true, reply[0].UUID.GoUUID
}
func deleteBridge(ctx context.Context, ovs client.Client, rootUUID string, bridge *bridgeType) {
log.Printf("deleting bridge %s", bridge.Name)
deleteOp, err := ovs.Where(bridge).Delete()
if err != nil {
log.Fatal(err)
}
ovsRow := ovsType{
UUID: rootUUID,
}
mutateOp, err := ovs.Where(&ovsRow).Mutate(&ovsRow, model.Mutation{
Field: &ovsRow.Bridges,
Mutator: ovsdb.MutateOperationDelete,
Value: []string{bridge.UUID},
})
if err != nil {
log.Fatal(err)
}
operations := append(deleteOp, mutateOp...)
_, _ = transact(ctx, ovs, operations)
}
func newBridge() bridgeType {
return bridgeType{
UUID: "gopher",
Name: fmt.Sprintf("br-%s", uuid.NewString()),
OtherConfig: map[string]string{
"foo": "bar",
"fake": "config",
},
ExternalIds: map[string]string{
"key1": "val1",
"key2": "val2",
},
}
}
func createBridge(ctx context.Context, ovs client.Client, rootUUID string, bridge bridgeType) {
insertOp, err := ovs.Create(&bridge)
if err != nil {
log.Fatal(err)
}
ovsRow := ovsType{}
mutateOp, err := ovs.Where(&ovsType{UUID: rootUUID}).Mutate(&ovsRow, model.Mutation{
Field: &ovsRow.Bridges,
Mutator: ovsdb.MutateOperationInsert,
Value: []string{bridge.UUID},
})
if err != nil {
log.Fatal(err)
}
operations := append(insertOp, mutateOp...)
_, _ = transact(ctx, ovs, operations)
}
func main() {
flag.Parse()
ctx := context.Background()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal(err)
}
if err := pprof.StartCPUProfile(f); err != nil {
log.Fatal(err)
}
defer pprof.StopCPUProfile()
}
if !*verbose {
log.SetOutput(io.Discard)
}
var err error
dbModel, err = model.NewDBModel("Open_vSwitch", map[string]model.Model{"Open_vSwitch": &ovsType{}, "Bridge": &bridgeType{}})
if err != nil {
log.Fatal(err)
}
cleanup(ctx)
var wg sync.WaitGroup
resultChan := make(chan result)
results := make([]result, *nclients)
go func() {
for result := range resultChan {
results = append(results, result)
}
}()
for i := 0; i < *nclients; i++ {
wg.Add(1)
go run(ctx, resultChan, &wg)
if !*parallel {
wg.Wait()
}
}
log.Print("waiting for clients to complete")
// wait for all clients
wg.Wait()
// close the result channel to avoid leaking a goroutine
close(resultChan)
result := result{}
for _, r := range results {
result.insertions += r.insertions
result.deletions += r.deletions
result.transactTime = append(result.transactTime, r.transactTime...)
result.cacheTime = append(result.transactTime, r.cacheTime...)
}
fmt.Printf("\n\n\n")
fmt.Printf("Summary:\n")
fmt.Printf("\tTotal Insertions: %d\n", result.insertions)
fmt.Printf("\tTotal Deletions: %d\n", result.deletions)
if *memprofile != "" {
f, err := os.Create(*memprofile)
if err != nil {
log.Fatal(err)
}
defer f.Close()
runtime.GC()
if err := pprof.WriteHeapProfile(f); err != nil {
log.Fatal("could not write memory profile: ", err)
}
}
}