Colin Cross | 7bb052a | 2015-02-03 12:59:37 -0800 | [diff] [blame^] | 1 | // Copyright 2009 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package rpc |
| 6 | |
| 7 | import ( |
| 8 | "errors" |
| 9 | "fmt" |
| 10 | "io" |
| 11 | "log" |
| 12 | "net" |
| 13 | "net/http/httptest" |
| 14 | "runtime" |
| 15 | "strings" |
| 16 | "sync" |
| 17 | "sync/atomic" |
| 18 | "testing" |
| 19 | "time" |
| 20 | ) |
| 21 | |
| 22 | var ( |
| 23 | newServer *Server |
| 24 | serverAddr, newServerAddr string |
| 25 | httpServerAddr string |
| 26 | once, newOnce, httpOnce sync.Once |
| 27 | ) |
| 28 | |
| 29 | const ( |
| 30 | newHttpPath = "/foo" |
| 31 | ) |
| 32 | |
| 33 | type Args struct { |
| 34 | A, B int |
| 35 | } |
| 36 | |
| 37 | type Reply struct { |
| 38 | C int |
| 39 | } |
| 40 | |
| 41 | type Arith int |
| 42 | |
| 43 | // Some of Arith's methods have value args, some have pointer args. That's deliberate. |
| 44 | |
| 45 | func (t *Arith) Add(args Args, reply *Reply) error { |
| 46 | reply.C = args.A + args.B |
| 47 | return nil |
| 48 | } |
| 49 | |
| 50 | func (t *Arith) Mul(args *Args, reply *Reply) error { |
| 51 | reply.C = args.A * args.B |
| 52 | return nil |
| 53 | } |
| 54 | |
| 55 | func (t *Arith) Div(args Args, reply *Reply) error { |
| 56 | if args.B == 0 { |
| 57 | return errors.New("divide by zero") |
| 58 | } |
| 59 | reply.C = args.A / args.B |
| 60 | return nil |
| 61 | } |
| 62 | |
| 63 | func (t *Arith) String(args *Args, reply *string) error { |
| 64 | *reply = fmt.Sprintf("%d+%d=%d", args.A, args.B, args.A+args.B) |
| 65 | return nil |
| 66 | } |
| 67 | |
| 68 | func (t *Arith) Scan(args string, reply *Reply) (err error) { |
| 69 | _, err = fmt.Sscan(args, &reply.C) |
| 70 | return |
| 71 | } |
| 72 | |
| 73 | func (t *Arith) Error(args *Args, reply *Reply) error { |
| 74 | panic("ERROR") |
| 75 | } |
| 76 | |
| 77 | func listenTCP() (net.Listener, string) { |
| 78 | l, e := net.Listen("tcp", "127.0.0.1:0") // any available address |
| 79 | if e != nil { |
| 80 | log.Fatalf("net.Listen tcp :0: %v", e) |
| 81 | } |
| 82 | return l, l.Addr().String() |
| 83 | } |
| 84 | |
| 85 | func startServer() { |
| 86 | Register(new(Arith)) |
| 87 | RegisterName("net.rpc.Arith", new(Arith)) |
| 88 | |
| 89 | var l net.Listener |
| 90 | l, serverAddr = listenTCP() |
| 91 | log.Println("Test RPC server listening on", serverAddr) |
| 92 | go Accept(l) |
| 93 | |
| 94 | HandleHTTP() |
| 95 | httpOnce.Do(startHttpServer) |
| 96 | } |
| 97 | |
| 98 | func startNewServer() { |
| 99 | newServer = NewServer() |
| 100 | newServer.Register(new(Arith)) |
| 101 | newServer.RegisterName("net.rpc.Arith", new(Arith)) |
| 102 | newServer.RegisterName("newServer.Arith", new(Arith)) |
| 103 | |
| 104 | var l net.Listener |
| 105 | l, newServerAddr = listenTCP() |
| 106 | log.Println("NewServer test RPC server listening on", newServerAddr) |
| 107 | go newServer.Accept(l) |
| 108 | |
| 109 | newServer.HandleHTTP(newHttpPath, "/bar") |
| 110 | httpOnce.Do(startHttpServer) |
| 111 | } |
| 112 | |
| 113 | func startHttpServer() { |
| 114 | server := httptest.NewServer(nil) |
| 115 | httpServerAddr = server.Listener.Addr().String() |
| 116 | log.Println("Test HTTP RPC server listening on", httpServerAddr) |
| 117 | } |
| 118 | |
| 119 | func TestRPC(t *testing.T) { |
| 120 | once.Do(startServer) |
| 121 | testRPC(t, serverAddr) |
| 122 | newOnce.Do(startNewServer) |
| 123 | testRPC(t, newServerAddr) |
| 124 | testNewServerRPC(t, newServerAddr) |
| 125 | } |
| 126 | |
| 127 | func testRPC(t *testing.T, addr string) { |
| 128 | client, err := Dial("tcp", addr) |
| 129 | if err != nil { |
| 130 | t.Fatal("dialing", err) |
| 131 | } |
| 132 | defer client.Close() |
| 133 | |
| 134 | // Synchronous calls |
| 135 | args := &Args{7, 8} |
| 136 | reply := new(Reply) |
| 137 | err = client.Call("Arith.Add", args, reply) |
| 138 | if err != nil { |
| 139 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 140 | } |
| 141 | if reply.C != args.A+args.B { |
| 142 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 143 | } |
| 144 | |
| 145 | // Nonexistent method |
| 146 | args = &Args{7, 0} |
| 147 | reply = new(Reply) |
| 148 | err = client.Call("Arith.BadOperation", args, reply) |
| 149 | // expect an error |
| 150 | if err == nil { |
| 151 | t.Error("BadOperation: expected error") |
| 152 | } else if !strings.HasPrefix(err.Error(), "rpc: can't find method ") { |
| 153 | t.Errorf("BadOperation: expected can't find method error; got %q", err) |
| 154 | } |
| 155 | |
| 156 | // Unknown service |
| 157 | args = &Args{7, 8} |
| 158 | reply = new(Reply) |
| 159 | err = client.Call("Arith.Unknown", args, reply) |
| 160 | if err == nil { |
| 161 | t.Error("expected error calling unknown service") |
| 162 | } else if strings.Index(err.Error(), "method") < 0 { |
| 163 | t.Error("expected error about method; got", err) |
| 164 | } |
| 165 | |
| 166 | // Out of order. |
| 167 | args = &Args{7, 8} |
| 168 | mulReply := new(Reply) |
| 169 | mulCall := client.Go("Arith.Mul", args, mulReply, nil) |
| 170 | addReply := new(Reply) |
| 171 | addCall := client.Go("Arith.Add", args, addReply, nil) |
| 172 | |
| 173 | addCall = <-addCall.Done |
| 174 | if addCall.Error != nil { |
| 175 | t.Errorf("Add: expected no error but got string %q", addCall.Error.Error()) |
| 176 | } |
| 177 | if addReply.C != args.A+args.B { |
| 178 | t.Errorf("Add: expected %d got %d", addReply.C, args.A+args.B) |
| 179 | } |
| 180 | |
| 181 | mulCall = <-mulCall.Done |
| 182 | if mulCall.Error != nil { |
| 183 | t.Errorf("Mul: expected no error but got string %q", mulCall.Error.Error()) |
| 184 | } |
| 185 | if mulReply.C != args.A*args.B { |
| 186 | t.Errorf("Mul: expected %d got %d", mulReply.C, args.A*args.B) |
| 187 | } |
| 188 | |
| 189 | // Error test |
| 190 | args = &Args{7, 0} |
| 191 | reply = new(Reply) |
| 192 | err = client.Call("Arith.Div", args, reply) |
| 193 | // expect an error: zero divide |
| 194 | if err == nil { |
| 195 | t.Error("Div: expected error") |
| 196 | } else if err.Error() != "divide by zero" { |
| 197 | t.Error("Div: expected divide by zero error; got", err) |
| 198 | } |
| 199 | |
| 200 | // Bad type. |
| 201 | reply = new(Reply) |
| 202 | err = client.Call("Arith.Add", reply, reply) // args, reply would be the correct thing to use |
| 203 | if err == nil { |
| 204 | t.Error("expected error calling Arith.Add with wrong arg type") |
| 205 | } else if strings.Index(err.Error(), "type") < 0 { |
| 206 | t.Error("expected error about type; got", err) |
| 207 | } |
| 208 | |
| 209 | // Non-struct argument |
| 210 | const Val = 12345 |
| 211 | str := fmt.Sprint(Val) |
| 212 | reply = new(Reply) |
| 213 | err = client.Call("Arith.Scan", &str, reply) |
| 214 | if err != nil { |
| 215 | t.Errorf("Scan: expected no error but got string %q", err.Error()) |
| 216 | } else if reply.C != Val { |
| 217 | t.Errorf("Scan: expected %d got %d", Val, reply.C) |
| 218 | } |
| 219 | |
| 220 | // Non-struct reply |
| 221 | args = &Args{27, 35} |
| 222 | str = "" |
| 223 | err = client.Call("Arith.String", args, &str) |
| 224 | if err != nil { |
| 225 | t.Errorf("String: expected no error but got string %q", err.Error()) |
| 226 | } |
| 227 | expect := fmt.Sprintf("%d+%d=%d", args.A, args.B, args.A+args.B) |
| 228 | if str != expect { |
| 229 | t.Errorf("String: expected %s got %s", expect, str) |
| 230 | } |
| 231 | |
| 232 | args = &Args{7, 8} |
| 233 | reply = new(Reply) |
| 234 | err = client.Call("Arith.Mul", args, reply) |
| 235 | if err != nil { |
| 236 | t.Errorf("Mul: expected no error but got string %q", err.Error()) |
| 237 | } |
| 238 | if reply.C != args.A*args.B { |
| 239 | t.Errorf("Mul: expected %d got %d", reply.C, args.A*args.B) |
| 240 | } |
| 241 | |
| 242 | // ServiceName contain "." character |
| 243 | args = &Args{7, 8} |
| 244 | reply = new(Reply) |
| 245 | err = client.Call("net.rpc.Arith.Add", args, reply) |
| 246 | if err != nil { |
| 247 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 248 | } |
| 249 | if reply.C != args.A+args.B { |
| 250 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | func testNewServerRPC(t *testing.T, addr string) { |
| 255 | client, err := Dial("tcp", addr) |
| 256 | if err != nil { |
| 257 | t.Fatal("dialing", err) |
| 258 | } |
| 259 | defer client.Close() |
| 260 | |
| 261 | // Synchronous calls |
| 262 | args := &Args{7, 8} |
| 263 | reply := new(Reply) |
| 264 | err = client.Call("newServer.Arith.Add", args, reply) |
| 265 | if err != nil { |
| 266 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 267 | } |
| 268 | if reply.C != args.A+args.B { |
| 269 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | func TestHTTP(t *testing.T) { |
| 274 | once.Do(startServer) |
| 275 | testHTTPRPC(t, "") |
| 276 | newOnce.Do(startNewServer) |
| 277 | testHTTPRPC(t, newHttpPath) |
| 278 | } |
| 279 | |
| 280 | func testHTTPRPC(t *testing.T, path string) { |
| 281 | var client *Client |
| 282 | var err error |
| 283 | if path == "" { |
| 284 | client, err = DialHTTP("tcp", httpServerAddr) |
| 285 | } else { |
| 286 | client, err = DialHTTPPath("tcp", httpServerAddr, path) |
| 287 | } |
| 288 | if err != nil { |
| 289 | t.Fatal("dialing", err) |
| 290 | } |
| 291 | defer client.Close() |
| 292 | |
| 293 | // Synchronous calls |
| 294 | args := &Args{7, 8} |
| 295 | reply := new(Reply) |
| 296 | err = client.Call("Arith.Add", args, reply) |
| 297 | if err != nil { |
| 298 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 299 | } |
| 300 | if reply.C != args.A+args.B { |
| 301 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | // CodecEmulator provides a client-like api and a ServerCodec interface. |
| 306 | // Can be used to test ServeRequest. |
| 307 | type CodecEmulator struct { |
| 308 | server *Server |
| 309 | serviceMethod string |
| 310 | args *Args |
| 311 | reply *Reply |
| 312 | err error |
| 313 | } |
| 314 | |
| 315 | func (codec *CodecEmulator) Call(serviceMethod string, args *Args, reply *Reply) error { |
| 316 | codec.serviceMethod = serviceMethod |
| 317 | codec.args = args |
| 318 | codec.reply = reply |
| 319 | codec.err = nil |
| 320 | var serverError error |
| 321 | if codec.server == nil { |
| 322 | serverError = ServeRequest(codec) |
| 323 | } else { |
| 324 | serverError = codec.server.ServeRequest(codec) |
| 325 | } |
| 326 | if codec.err == nil && serverError != nil { |
| 327 | codec.err = serverError |
| 328 | } |
| 329 | return codec.err |
| 330 | } |
| 331 | |
| 332 | func (codec *CodecEmulator) ReadRequestHeader(req *Request) error { |
| 333 | req.ServiceMethod = codec.serviceMethod |
| 334 | req.Seq = 0 |
| 335 | return nil |
| 336 | } |
| 337 | |
| 338 | func (codec *CodecEmulator) ReadRequestBody(argv interface{}) error { |
| 339 | if codec.args == nil { |
| 340 | return io.ErrUnexpectedEOF |
| 341 | } |
| 342 | *(argv.(*Args)) = *codec.args |
| 343 | return nil |
| 344 | } |
| 345 | |
| 346 | func (codec *CodecEmulator) WriteResponse(resp *Response, reply interface{}) error { |
| 347 | if resp.Error != "" { |
| 348 | codec.err = errors.New(resp.Error) |
| 349 | } else { |
| 350 | *codec.reply = *(reply.(*Reply)) |
| 351 | } |
| 352 | return nil |
| 353 | } |
| 354 | |
| 355 | func (codec *CodecEmulator) Close() error { |
| 356 | return nil |
| 357 | } |
| 358 | |
| 359 | func TestServeRequest(t *testing.T) { |
| 360 | once.Do(startServer) |
| 361 | testServeRequest(t, nil) |
| 362 | newOnce.Do(startNewServer) |
| 363 | testServeRequest(t, newServer) |
| 364 | } |
| 365 | |
| 366 | func testServeRequest(t *testing.T, server *Server) { |
| 367 | client := CodecEmulator{server: server} |
| 368 | defer client.Close() |
| 369 | |
| 370 | args := &Args{7, 8} |
| 371 | reply := new(Reply) |
| 372 | err := client.Call("Arith.Add", args, reply) |
| 373 | if err != nil { |
| 374 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 375 | } |
| 376 | if reply.C != args.A+args.B { |
| 377 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 378 | } |
| 379 | |
| 380 | err = client.Call("Arith.Add", nil, reply) |
| 381 | if err == nil { |
| 382 | t.Errorf("expected error calling Arith.Add with nil arg") |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | type ReplyNotPointer int |
| 387 | type ArgNotPublic int |
| 388 | type ReplyNotPublic int |
| 389 | type NeedsPtrType int |
| 390 | type local struct{} |
| 391 | |
| 392 | func (t *ReplyNotPointer) ReplyNotPointer(args *Args, reply Reply) error { |
| 393 | return nil |
| 394 | } |
| 395 | |
| 396 | func (t *ArgNotPublic) ArgNotPublic(args *local, reply *Reply) error { |
| 397 | return nil |
| 398 | } |
| 399 | |
| 400 | func (t *ReplyNotPublic) ReplyNotPublic(args *Args, reply *local) error { |
| 401 | return nil |
| 402 | } |
| 403 | |
| 404 | func (t *NeedsPtrType) NeedsPtrType(args *Args, reply *Reply) error { |
| 405 | return nil |
| 406 | } |
| 407 | |
| 408 | // Check that registration handles lots of bad methods and a type with no suitable methods. |
| 409 | func TestRegistrationError(t *testing.T) { |
| 410 | err := Register(new(ReplyNotPointer)) |
| 411 | if err == nil { |
| 412 | t.Error("expected error registering ReplyNotPointer") |
| 413 | } |
| 414 | err = Register(new(ArgNotPublic)) |
| 415 | if err == nil { |
| 416 | t.Error("expected error registering ArgNotPublic") |
| 417 | } |
| 418 | err = Register(new(ReplyNotPublic)) |
| 419 | if err == nil { |
| 420 | t.Error("expected error registering ReplyNotPublic") |
| 421 | } |
| 422 | err = Register(NeedsPtrType(0)) |
| 423 | if err == nil { |
| 424 | t.Error("expected error registering NeedsPtrType") |
| 425 | } else if !strings.Contains(err.Error(), "pointer") { |
| 426 | t.Error("expected hint when registering NeedsPtrType") |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | type WriteFailCodec int |
| 431 | |
| 432 | func (WriteFailCodec) WriteRequest(*Request, interface{}) error { |
| 433 | // the panic caused by this error used to not unlock a lock. |
| 434 | return errors.New("fail") |
| 435 | } |
| 436 | |
| 437 | func (WriteFailCodec) ReadResponseHeader(*Response) error { |
| 438 | select {} |
| 439 | } |
| 440 | |
| 441 | func (WriteFailCodec) ReadResponseBody(interface{}) error { |
| 442 | select {} |
| 443 | } |
| 444 | |
| 445 | func (WriteFailCodec) Close() error { |
| 446 | return nil |
| 447 | } |
| 448 | |
| 449 | func TestSendDeadlock(t *testing.T) { |
| 450 | client := NewClientWithCodec(WriteFailCodec(0)) |
| 451 | defer client.Close() |
| 452 | |
| 453 | done := make(chan bool) |
| 454 | go func() { |
| 455 | testSendDeadlock(client) |
| 456 | testSendDeadlock(client) |
| 457 | done <- true |
| 458 | }() |
| 459 | select { |
| 460 | case <-done: |
| 461 | return |
| 462 | case <-time.After(5 * time.Second): |
| 463 | t.Fatal("deadlock") |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | func testSendDeadlock(client *Client) { |
| 468 | defer func() { |
| 469 | recover() |
| 470 | }() |
| 471 | args := &Args{7, 8} |
| 472 | reply := new(Reply) |
| 473 | client.Call("Arith.Add", args, reply) |
| 474 | } |
| 475 | |
| 476 | func dialDirect() (*Client, error) { |
| 477 | return Dial("tcp", serverAddr) |
| 478 | } |
| 479 | |
| 480 | func dialHTTP() (*Client, error) { |
| 481 | return DialHTTP("tcp", httpServerAddr) |
| 482 | } |
| 483 | |
| 484 | func countMallocs(dial func() (*Client, error), t *testing.T) float64 { |
| 485 | once.Do(startServer) |
| 486 | client, err := dial() |
| 487 | if err != nil { |
| 488 | t.Fatal("error dialing", err) |
| 489 | } |
| 490 | defer client.Close() |
| 491 | |
| 492 | args := &Args{7, 8} |
| 493 | reply := new(Reply) |
| 494 | return testing.AllocsPerRun(100, func() { |
| 495 | err := client.Call("Arith.Add", args, reply) |
| 496 | if err != nil { |
| 497 | t.Errorf("Add: expected no error but got string %q", err.Error()) |
| 498 | } |
| 499 | if reply.C != args.A+args.B { |
| 500 | t.Errorf("Add: expected %d got %d", reply.C, args.A+args.B) |
| 501 | } |
| 502 | }) |
| 503 | } |
| 504 | |
| 505 | func TestCountMallocs(t *testing.T) { |
| 506 | if testing.Short() { |
| 507 | t.Skip("skipping malloc count in short mode") |
| 508 | } |
| 509 | if runtime.GOMAXPROCS(0) > 1 { |
| 510 | t.Skip("skipping; GOMAXPROCS>1") |
| 511 | } |
| 512 | fmt.Printf("mallocs per rpc round trip: %v\n", countMallocs(dialDirect, t)) |
| 513 | } |
| 514 | |
| 515 | func TestCountMallocsOverHTTP(t *testing.T) { |
| 516 | if testing.Short() { |
| 517 | t.Skip("skipping malloc count in short mode") |
| 518 | } |
| 519 | if runtime.GOMAXPROCS(0) > 1 { |
| 520 | t.Skip("skipping; GOMAXPROCS>1") |
| 521 | } |
| 522 | fmt.Printf("mallocs per HTTP rpc round trip: %v\n", countMallocs(dialHTTP, t)) |
| 523 | } |
| 524 | |
| 525 | type writeCrasher struct { |
| 526 | done chan bool |
| 527 | } |
| 528 | |
| 529 | func (writeCrasher) Close() error { |
| 530 | return nil |
| 531 | } |
| 532 | |
| 533 | func (w *writeCrasher) Read(p []byte) (int, error) { |
| 534 | <-w.done |
| 535 | return 0, io.EOF |
| 536 | } |
| 537 | |
| 538 | func (writeCrasher) Write(p []byte) (int, error) { |
| 539 | return 0, errors.New("fake write failure") |
| 540 | } |
| 541 | |
| 542 | func TestClientWriteError(t *testing.T) { |
| 543 | w := &writeCrasher{done: make(chan bool)} |
| 544 | c := NewClient(w) |
| 545 | defer c.Close() |
| 546 | |
| 547 | res := false |
| 548 | err := c.Call("foo", 1, &res) |
| 549 | if err == nil { |
| 550 | t.Fatal("expected error") |
| 551 | } |
| 552 | if err.Error() != "fake write failure" { |
| 553 | t.Error("unexpected value of error:", err) |
| 554 | } |
| 555 | w.done <- true |
| 556 | } |
| 557 | |
| 558 | func TestTCPClose(t *testing.T) { |
| 559 | once.Do(startServer) |
| 560 | |
| 561 | client, err := dialHTTP() |
| 562 | if err != nil { |
| 563 | t.Fatalf("dialing: %v", err) |
| 564 | } |
| 565 | defer client.Close() |
| 566 | |
| 567 | args := Args{17, 8} |
| 568 | var reply Reply |
| 569 | err = client.Call("Arith.Mul", args, &reply) |
| 570 | if err != nil { |
| 571 | t.Fatal("arith error:", err) |
| 572 | } |
| 573 | t.Logf("Arith: %d*%d=%d\n", args.A, args.B, reply) |
| 574 | if reply.C != args.A*args.B { |
| 575 | t.Errorf("Add: expected %d got %d", reply.C, args.A*args.B) |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | func TestErrorAfterClientClose(t *testing.T) { |
| 580 | once.Do(startServer) |
| 581 | |
| 582 | client, err := dialHTTP() |
| 583 | if err != nil { |
| 584 | t.Fatalf("dialing: %v", err) |
| 585 | } |
| 586 | err = client.Close() |
| 587 | if err != nil { |
| 588 | t.Fatal("close error:", err) |
| 589 | } |
| 590 | err = client.Call("Arith.Add", &Args{7, 9}, new(Reply)) |
| 591 | if err != ErrShutdown { |
| 592 | t.Errorf("Forever: expected ErrShutdown got %v", err) |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | func benchmarkEndToEnd(dial func() (*Client, error), b *testing.B) { |
| 597 | once.Do(startServer) |
| 598 | client, err := dial() |
| 599 | if err != nil { |
| 600 | b.Fatal("error dialing:", err) |
| 601 | } |
| 602 | defer client.Close() |
| 603 | |
| 604 | // Synchronous calls |
| 605 | args := &Args{7, 8} |
| 606 | b.ResetTimer() |
| 607 | |
| 608 | b.RunParallel(func(pb *testing.PB) { |
| 609 | reply := new(Reply) |
| 610 | for pb.Next() { |
| 611 | err := client.Call("Arith.Add", args, reply) |
| 612 | if err != nil { |
| 613 | b.Fatalf("rpc error: Add: expected no error but got string %q", err.Error()) |
| 614 | } |
| 615 | if reply.C != args.A+args.B { |
| 616 | b.Fatalf("rpc error: Add: expected %d got %d", reply.C, args.A+args.B) |
| 617 | } |
| 618 | } |
| 619 | }) |
| 620 | } |
| 621 | |
| 622 | func benchmarkEndToEndAsync(dial func() (*Client, error), b *testing.B) { |
| 623 | const MaxConcurrentCalls = 100 |
| 624 | once.Do(startServer) |
| 625 | client, err := dial() |
| 626 | if err != nil { |
| 627 | b.Fatal("error dialing:", err) |
| 628 | } |
| 629 | defer client.Close() |
| 630 | |
| 631 | // Asynchronous calls |
| 632 | args := &Args{7, 8} |
| 633 | procs := 4 * runtime.GOMAXPROCS(-1) |
| 634 | send := int32(b.N) |
| 635 | recv := int32(b.N) |
| 636 | var wg sync.WaitGroup |
| 637 | wg.Add(procs) |
| 638 | gate := make(chan bool, MaxConcurrentCalls) |
| 639 | res := make(chan *Call, MaxConcurrentCalls) |
| 640 | b.ResetTimer() |
| 641 | |
| 642 | for p := 0; p < procs; p++ { |
| 643 | go func() { |
| 644 | for atomic.AddInt32(&send, -1) >= 0 { |
| 645 | gate <- true |
| 646 | reply := new(Reply) |
| 647 | client.Go("Arith.Add", args, reply, res) |
| 648 | } |
| 649 | }() |
| 650 | go func() { |
| 651 | for call := range res { |
| 652 | A := call.Args.(*Args).A |
| 653 | B := call.Args.(*Args).B |
| 654 | C := call.Reply.(*Reply).C |
| 655 | if A+B != C { |
| 656 | b.Fatalf("incorrect reply: Add: expected %d got %d", A+B, C) |
| 657 | } |
| 658 | <-gate |
| 659 | if atomic.AddInt32(&recv, -1) == 0 { |
| 660 | close(res) |
| 661 | } |
| 662 | } |
| 663 | wg.Done() |
| 664 | }() |
| 665 | } |
| 666 | wg.Wait() |
| 667 | } |
| 668 | |
| 669 | func BenchmarkEndToEnd(b *testing.B) { |
| 670 | benchmarkEndToEnd(dialDirect, b) |
| 671 | } |
| 672 | |
| 673 | func BenchmarkEndToEndHTTP(b *testing.B) { |
| 674 | benchmarkEndToEnd(dialHTTP, b) |
| 675 | } |
| 676 | |
| 677 | func BenchmarkEndToEndAsync(b *testing.B) { |
| 678 | benchmarkEndToEndAsync(dialDirect, b) |
| 679 | } |
| 680 | |
| 681 | func BenchmarkEndToEndAsyncHTTP(b *testing.B) { |
| 682 | benchmarkEndToEndAsync(dialHTTP, b) |
| 683 | } |