299 lines
9.1 KiB
Go
299 lines
9.1 KiB
Go
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/*
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*
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* Copyright 2016, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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// client starts an interop client to do stress test and a metrics server to report qps.
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package main
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import (
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"flag"
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"fmt"
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"math/rand"
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"net"
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"strconv"
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"strings"
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"sync"
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"time"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/grpclog"
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"google.golang.org/grpc/interop"
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testpb "google.golang.org/grpc/interop/grpc_testing"
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metricspb "google.golang.org/grpc/stress/grpc_testing"
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)
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var (
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serverAddresses = flag.String("server_addresses", "localhost:8080", "a list of server addresses")
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testCases = flag.String("test_cases", "", "a list of test cases along with the relative weights")
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testDurationSecs = flag.Int("test_duration_secs", -1, "test duration in seconds")
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numChannelsPerServer = flag.Int("num_channels_per_server", 1, "Number of channels (i.e connections) to each server")
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numStubsPerChannel = flag.Int("num_stubs_per_channel", 1, "Number of client stubs per each connection to server")
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metricsPort = flag.Int("metrics_port", 8081, "The port at which the stress client exposes QPS metrics")
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)
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// testCaseWithWeight contains the test case type and its weight.
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type testCaseWithWeight struct {
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name string
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weight int
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}
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// parseTestCases converts test case string to a list of struct testCaseWithWeight.
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func parseTestCases(testCaseString string) []testCaseWithWeight {
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testCaseStrings := strings.Split(testCaseString, ",")
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testCases := make([]testCaseWithWeight, len(testCaseStrings))
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for i, str := range testCaseStrings {
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testCase := strings.Split(str, ":")
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if len(testCase) != 2 {
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panic(fmt.Sprintf("invalid test case with weight: %s", str))
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}
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// Check if test case is supported.
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switch testCase[0] {
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case
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"empty_unary",
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"large_unary",
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"client_streaming",
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"server_streaming",
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"empty_stream":
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default:
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panic(fmt.Sprintf("unknown test type: %s", testCase[0]))
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}
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testCases[i].name = testCase[0]
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w, err := strconv.Atoi(testCase[1])
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if err != nil {
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panic(fmt.Sprintf("%v", err))
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}
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testCases[i].weight = w
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}
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return testCases
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}
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// weightedRandomTestSelector defines a weighted random selector for test case types.
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type weightedRandomTestSelector struct {
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tests []testCaseWithWeight
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totalWeight int
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}
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// newWeightedRandomTestSelector constructs a weightedRandomTestSelector with the given list of testCaseWithWeight.
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func newWeightedRandomTestSelector(tests []testCaseWithWeight) *weightedRandomTestSelector {
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var totalWeight int
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for _, t := range tests {
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totalWeight += t.weight
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}
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rand.Seed(time.Now().UnixNano())
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return &weightedRandomTestSelector{tests, totalWeight}
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}
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func (selector weightedRandomTestSelector) getNextTest() string {
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random := rand.Intn(selector.totalWeight)
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var weightSofar int
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for _, test := range selector.tests {
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weightSofar += test.weight
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if random < weightSofar {
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return test.name
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}
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}
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panic("no test case selected by weightedRandomTestSelector")
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}
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// gauge stores the qps of one interop client (one stub).
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type gauge struct {
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mutex sync.RWMutex
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val int64
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}
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func (g *gauge) set(v int64) {
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g.mutex.Lock()
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defer g.mutex.Unlock()
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g.val = v
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}
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func (g *gauge) get() int64 {
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g.mutex.RLock()
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defer g.mutex.RUnlock()
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return g.val
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}
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// server implements metrics server functions.
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type server struct {
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mutex sync.RWMutex
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// gauges is a map from /stress_test/server_<n>/channel_<n>/stub_<n>/qps to its qps gauge.
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gauges map[string]*gauge
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}
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// newMetricsServer returns a new metrics server.
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func newMetricsServer() *server {
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return &server{gauges: make(map[string]*gauge)}
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}
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// GetAllGauges returns all gauges.
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func (s *server) GetAllGauges(in *metricspb.EmptyMessage, stream metricspb.MetricsService_GetAllGaugesServer) error {
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s.mutex.RLock()
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defer s.mutex.RUnlock()
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for name, gauge := range s.gauges {
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if err := stream.Send(&metricspb.GaugeResponse{Name: name, Value: &metricspb.GaugeResponse_LongValue{LongValue: gauge.get()}}); err != nil {
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return err
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}
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}
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return nil
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}
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// GetGauge returns the gauge for the given name.
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func (s *server) GetGauge(ctx context.Context, in *metricspb.GaugeRequest) (*metricspb.GaugeResponse, error) {
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s.mutex.RLock()
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defer s.mutex.RUnlock()
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if g, ok := s.gauges[in.Name]; ok {
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return &metricspb.GaugeResponse{Name: in.Name, Value: &metricspb.GaugeResponse_LongValue{LongValue: g.get()}}, nil
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}
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return nil, grpc.Errorf(codes.InvalidArgument, "gauge with name %s not found", in.Name)
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}
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// createGauge creates a guage using the given name in metrics server.
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func (s *server) createGauge(name string) *gauge {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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if _, ok := s.gauges[name]; ok {
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// gauge already exists.
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panic(fmt.Sprintf("gauge %s already exists", name))
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}
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var g gauge
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s.gauges[name] = &g
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return &g
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}
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func startServer(server *server, port int) {
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lis, err := net.Listen("tcp", ":"+strconv.Itoa(port))
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if err != nil {
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grpclog.Fatalf("failed to listen: %v", err)
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}
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s := grpc.NewServer()
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metricspb.RegisterMetricsServiceServer(s, server)
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s.Serve(lis)
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}
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// performRPCs uses weightedRandomTestSelector to select test case and runs the tests.
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func performRPCs(gauge *gauge, conn *grpc.ClientConn, selector *weightedRandomTestSelector, stop <-chan bool) {
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client := testpb.NewTestServiceClient(conn)
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var numCalls int64
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startTime := time.Now()
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for {
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done := make(chan bool, 1)
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go func() {
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test := selector.getNextTest()
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switch test {
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case "empty_unary":
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interop.DoEmptyUnaryCall(client)
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case "large_unary":
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interop.DoLargeUnaryCall(client)
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case "client_streaming":
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interop.DoClientStreaming(client)
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case "server_streaming":
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interop.DoServerStreaming(client)
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case "empty_stream":
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interop.DoEmptyStream(client)
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}
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done <- true
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}()
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select {
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case <-stop:
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return
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case <-done:
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numCalls++
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gauge.set(int64(float64(numCalls) / time.Since(startTime).Seconds()))
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}
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}
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}
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func logParameterInfo(addresses []string, tests []testCaseWithWeight) {
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grpclog.Printf("server_addresses: %s", *serverAddresses)
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grpclog.Printf("test_cases: %s", *testCases)
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grpclog.Printf("test_duration-secs: %d", *testDurationSecs)
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grpclog.Printf("num_channels_per_server: %d", *numChannelsPerServer)
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grpclog.Printf("num_stubs_per_channel: %d", *numStubsPerChannel)
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grpclog.Printf("metrics_port: %d", *metricsPort)
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grpclog.Println("addresses:")
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for i, addr := range addresses {
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grpclog.Printf("%d. %s\n", i+1, addr)
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}
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grpclog.Println("tests:")
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for i, test := range tests {
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grpclog.Printf("%d. %v\n", i+1, test)
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}
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}
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func main() {
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flag.Parse()
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addresses := strings.Split(*serverAddresses, ",")
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tests := parseTestCases(*testCases)
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logParameterInfo(addresses, tests)
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testSelector := newWeightedRandomTestSelector(tests)
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metricsServer := newMetricsServer()
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var wg sync.WaitGroup
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wg.Add(len(addresses) * *numChannelsPerServer * *numStubsPerChannel)
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stop := make(chan bool)
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for serverIndex, address := range addresses {
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for connIndex := 0; connIndex < *numChannelsPerServer; connIndex++ {
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conn, err := grpc.Dial(address, grpc.WithInsecure())
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if err != nil {
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grpclog.Fatalf("Fail to dial: %v", err)
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}
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defer conn.Close()
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for clientIndex := 0; clientIndex < *numStubsPerChannel; clientIndex++ {
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name := fmt.Sprintf("/stress_test/server_%d/channel_%d/stub_%d/qps", serverIndex+1, connIndex+1, clientIndex+1)
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go func() {
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defer wg.Done()
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g := metricsServer.createGauge(name)
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performRPCs(g, conn, testSelector, stop)
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}()
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}
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}
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}
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go startServer(metricsServer, *metricsPort)
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if *testDurationSecs > 0 {
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time.Sleep(time.Duration(*testDurationSecs) * time.Second)
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close(stop)
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}
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wg.Wait()
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grpclog.Printf(" ===== ALL DONE ===== ")
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}
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