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dex/vendor/google.golang.org/grpc/benchmark/benchmark.go

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2016-08-01 06:26:27 +00:00
/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
Package benchmark implements the building blocks to setup end-to-end gRPC benchmarks.
*/
package benchmark
import (
"fmt"
"io"
"net"
"golang.org/x/net/context"
"google.golang.org/grpc"
testpb "google.golang.org/grpc/benchmark/grpc_testing"
"google.golang.org/grpc/grpclog"
)
func newPayload(t testpb.PayloadType, size int) *testpb.Payload {
if size < 0 {
grpclog.Fatalf("Requested a response with invalid length %d", size)
}
body := make([]byte, size)
switch t {
case testpb.PayloadType_COMPRESSABLE:
case testpb.PayloadType_UNCOMPRESSABLE:
grpclog.Fatalf("PayloadType UNCOMPRESSABLE is not supported")
default:
grpclog.Fatalf("Unsupported payload type: %d", t)
}
return &testpb.Payload{
Type: t,
Body: body,
}
}
type testServer struct {
}
func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
return &testpb.SimpleResponse{
Payload: newPayload(in.ResponseType, int(in.ResponseSize)),
}, nil
}
func (s *testServer) StreamingCall(stream testpb.BenchmarkService_StreamingCallServer) error {
for {
in, err := stream.Recv()
if err == io.EOF {
// read done.
return nil
}
if err != nil {
return err
}
if err := stream.Send(&testpb.SimpleResponse{
Payload: newPayload(in.ResponseType, int(in.ResponseSize)),
}); err != nil {
return err
}
}
}
// byteBufServer is a gRPC server that sends and receives byte buffer.
// The purpose is to benchmark the gRPC performance without protobuf serialization/deserialization overhead.
type byteBufServer struct {
respSize int32
}
// UnaryCall is an empty function and is not used for benchmark.
// If bytebuf UnaryCall benchmark is needed later, the function body needs to be updated.
func (s *byteBufServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
return &testpb.SimpleResponse{}, nil
}
func (s *byteBufServer) StreamingCall(stream testpb.BenchmarkService_StreamingCallServer) error {
for {
var in []byte
err := stream.(grpc.ServerStream).RecvMsg(&in)
if err == io.EOF {
return nil
}
if err != nil {
return err
}
out := make([]byte, s.respSize)
if err := stream.(grpc.ServerStream).SendMsg(&out); err != nil {
return err
}
}
}
// ServerInfo contains the information to create a gRPC benchmark server.
type ServerInfo struct {
// Addr is the address of the server.
Addr string
// Type is the type of the server.
// It should be "protobuf" or "bytebuf".
Type string
// Metadata is an optional configuration.
// For "protobuf", it's ignored.
// For "bytebuf", it should be an int representing response size.
Metadata interface{}
}
// StartServer starts a gRPC server serving a benchmark service according to info.
// It returns its listen address and a function to stop the server.
func StartServer(info ServerInfo, opts ...grpc.ServerOption) (string, func()) {
lis, err := net.Listen("tcp", info.Addr)
if err != nil {
grpclog.Fatalf("Failed to listen: %v", err)
}
s := grpc.NewServer(opts...)
switch info.Type {
case "protobuf":
testpb.RegisterBenchmarkServiceServer(s, &testServer{})
case "bytebuf":
respSize, ok := info.Metadata.(int32)
if !ok {
grpclog.Fatalf("failed to StartServer, invalid metadata: %v, for Type: %v", info.Metadata, info.Type)
}
testpb.RegisterBenchmarkServiceServer(s, &byteBufServer{respSize: respSize})
default:
grpclog.Fatalf("failed to StartServer, unknown Type: %v", info.Type)
}
go s.Serve(lis)
return lis.Addr().String(), func() {
s.Stop()
}
}
// DoUnaryCall performs an unary RPC with given stub and request and response sizes.
func DoUnaryCall(tc testpb.BenchmarkServiceClient, reqSize, respSize int) error {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, reqSize)
req := &testpb.SimpleRequest{
ResponseType: pl.Type,
ResponseSize: int32(respSize),
Payload: pl,
}
if _, err := tc.UnaryCall(context.Background(), req); err != nil {
return fmt.Errorf("/BenchmarkService/UnaryCall(_, _) = _, %v, want _, <nil>", err)
}
return nil
}
// DoStreamingRoundTrip performs a round trip for a single streaming rpc.
func DoStreamingRoundTrip(stream testpb.BenchmarkService_StreamingCallClient, reqSize, respSize int) error {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, reqSize)
req := &testpb.SimpleRequest{
ResponseType: pl.Type,
ResponseSize: int32(respSize),
Payload: pl,
}
if err := stream.Send(req); err != nil {
return fmt.Errorf("/BenchmarkService/StreamingCall.Send(_) = %v, want <nil>", err)
}
if _, err := stream.Recv(); err != nil {
// EOF is a valid error here.
if err == io.EOF {
return nil
}
return fmt.Errorf("/BenchmarkService/StreamingCall.Recv(_) = %v, want <nil>", err)
}
return nil
}
// DoByteBufStreamingRoundTrip performs a round trip for a single streaming rpc, using a custom codec for byte buffer.
func DoByteBufStreamingRoundTrip(stream testpb.BenchmarkService_StreamingCallClient, reqSize, respSize int) error {
out := make([]byte, reqSize)
if err := stream.(grpc.ClientStream).SendMsg(&out); err != nil {
return fmt.Errorf("/BenchmarkService/StreamingCall.(ClientStream).SendMsg(_) = %v, want <nil>", err)
}
var in []byte
if err := stream.(grpc.ClientStream).RecvMsg(&in); err != nil {
// EOF is a valid error here.
if err == io.EOF {
return nil
}
return fmt.Errorf("/BenchmarkService/StreamingCall.(ClientStream).RecvMsg(_) = %v, want <nil>", err)
}
return nil
}
// NewClientConn creates a gRPC client connection to addr.
func NewClientConn(addr string, opts ...grpc.DialOption) *grpc.ClientConn {
conn, err := grpc.Dial(addr, opts...)
if err != nil {
grpclog.Fatalf("NewClientConn(%q) failed to create a ClientConn %v", addr, err)
}
return conn
}