aboutsummaryrefslogtreecommitdiffhomepage
path: root/test/cpp/qps/client.h
blob: 3a0c359b4cd4f5dfca6744ddd1e965c0cc37828b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
/*
 *
 * Copyright 2015, 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.
 *
 */

#ifndef TEST_QPS_CLIENT_H
#define TEST_QPS_CLIENT_H

#include <condition_variable>
#include <mutex>
#include <unordered_map>
#include <vector>

#include <grpc++/channel.h>
#include <grpc++/support/byte_buffer.h>
#include <grpc++/support/channel_arguments.h>
#include <grpc++/support/slice.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>

#include "src/proto/grpc/testing/payloads.grpc.pb.h"
#include "src/proto/grpc/testing/services.grpc.pb.h"

#include "test/cpp/qps/histogram.h"
#include "test/cpp/qps/interarrival.h"
#include "test/cpp/qps/limit_cores.h"
#include "test/cpp/qps/usage_timer.h"
#include "test/cpp/util/create_test_channel.h"

namespace grpc {
namespace testing {

template <class RequestType>
class ClientRequestCreator {
 public:
  ClientRequestCreator(RequestType* req, const PayloadConfig&) {
    // this template must be specialized
    // fail with an assertion rather than a compile-time
    // check since these only happen at the beginning anyway
    GPR_ASSERT(false);
  }
};

template <>
class ClientRequestCreator<SimpleRequest> {
 public:
  ClientRequestCreator(SimpleRequest* req,
                       const PayloadConfig& payload_config) {
    if (payload_config.has_bytebuf_params()) {
      GPR_ASSERT(false);  // not appropriate for this specialization
    } else if (payload_config.has_simple_params()) {
      req->set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
      req->set_response_size(payload_config.simple_params().resp_size());
      req->mutable_payload()->set_type(
          grpc::testing::PayloadType::COMPRESSABLE);
      int size = payload_config.simple_params().req_size();
      std::unique_ptr<char[]> body(new char[size]);
      req->mutable_payload()->set_body(body.get(), size);
    } else if (payload_config.has_complex_params()) {
      GPR_ASSERT(false);  // not appropriate for this specialization
    } else {
      // default should be simple proto without payloads
      req->set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
      req->set_response_size(0);
      req->mutable_payload()->set_type(
          grpc::testing::PayloadType::COMPRESSABLE);
    }
  }
};

template <>
class ClientRequestCreator<ByteBuffer> {
 public:
  ClientRequestCreator(ByteBuffer* req, const PayloadConfig& payload_config) {
    if (payload_config.has_bytebuf_params()) {
      std::unique_ptr<char[]> buf(
          new char[payload_config.bytebuf_params().req_size()]);
      grpc_slice s = grpc_slice_from_copied_buffer(
          buf.get(), payload_config.bytebuf_params().req_size());
      Slice slice(s, Slice::STEAL_REF);
      *req = ByteBuffer(&slice, 1);
    } else {
      GPR_ASSERT(false);  // not appropriate for this specialization
    }
  }
};

class HistogramEntry final {
 public:
  HistogramEntry() : value_used_(false), status_used_(false) {}
  bool value_used() const { return value_used_; }
  double value() const { return value_; }
  void set_value(double v) {
    value_used_ = true;
    value_ = v;
  }
  bool status_used() const { return status_used_; }
  int status() const { return status_; }
  void set_status(int status) {
    status_used_ = true;
    status_ = status;
  }

 private:
  bool value_used_;
  double value_;
  bool status_used_;
  int status_;
};

typedef std::unordered_map<int, int64_t> StatusHistogram;

inline void MergeStatusHistogram(const StatusHistogram& from,
                                 StatusHistogram* to) {
  for (StatusHistogram::const_iterator it = from.begin(); it != from.end();
       ++it) {
    (*to)[it->first] += it->second;
  }
}

class Client {
 public:
  Client()
      : timer_(new UsageTimer),
        interarrival_timer_(),
        started_requests_(false) {
    gpr_event_init(&start_requests_);
  }
  virtual ~Client() {}

  ClientStats Mark(bool reset) {
    Histogram latencies;
    StatusHistogram statuses;
    UsageTimer::Result timer_result;

    MaybeStartRequests();

    // avoid std::vector for old compilers that expect a copy constructor
    if (reset) {
      Histogram* to_merge = new Histogram[threads_.size()];
      StatusHistogram* to_merge_status = new StatusHistogram[threads_.size()];

      for (size_t i = 0; i < threads_.size(); i++) {
        threads_[i]->BeginSwap(&to_merge[i], &to_merge_status[i]);
      }
      std::unique_ptr<UsageTimer> timer(new UsageTimer);
      timer_.swap(timer);
      for (size_t i = 0; i < threads_.size(); i++) {
        latencies.Merge(to_merge[i]);
        MergeStatusHistogram(to_merge_status[i], &statuses);
      }
      delete[] to_merge;
      delete[] to_merge_status;
      timer_result = timer->Mark();
    } else {
      // merge snapshots of each thread histogram
      for (size_t i = 0; i < threads_.size(); i++) {
        threads_[i]->MergeStatsInto(&latencies, &statuses);
      }
      timer_result = timer_->Mark();
    }

    ClientStats stats;
    latencies.FillProto(stats.mutable_latencies());
    for (StatusHistogram::const_iterator it = statuses.begin();
         it != statuses.end(); ++it) {
      RequestResultCount* rrc = stats.add_request_results();
      rrc->set_status_code(it->first);
      rrc->set_count(it->second);
    }
    stats.set_time_elapsed(timer_result.wall);
    stats.set_time_system(timer_result.system);
    stats.set_time_user(timer_result.user);
    return stats;
  }

  // Must call AwaitThreadsCompletion before destructor to avoid a race
  // between destructor and invocation of virtual ThreadFunc
  void AwaitThreadsCompletion() {
    gpr_atm_rel_store(&thread_pool_done_, static_cast<gpr_atm>(true));
    DestroyMultithreading();
    std::unique_lock<std::mutex> g(thread_completion_mu_);
    while (threads_remaining_ != 0) {
      threads_complete_.wait(g);
    }
  }

 protected:
  bool closed_loop_;
  gpr_atm thread_pool_done_;

  void StartThreads(size_t num_threads) {
    gpr_atm_rel_store(&thread_pool_done_, static_cast<gpr_atm>(false));
    threads_remaining_ = num_threads;
    for (size_t i = 0; i < num_threads; i++) {
      threads_.emplace_back(new Thread(this, i));
    }
  }

  void EndThreads() {
    MaybeStartRequests();
    threads_.clear();
  }

  virtual void DestroyMultithreading() = 0;
  virtual bool ThreadFunc(HistogramEntry* histogram, size_t thread_idx) = 0;

  void SetupLoadTest(const ClientConfig& config, size_t num_threads) {
    // Set up the load distribution based on the number of threads
    const auto& load = config.load_params();

    std::unique_ptr<RandomDistInterface> random_dist;
    switch (load.load_case()) {
      case LoadParams::kClosedLoop:
        // Closed-loop doesn't use random dist at all
        break;
      case LoadParams::kPoisson:
        random_dist.reset(
            new ExpDist(load.poisson().offered_load() / num_threads));
        break;
      default:
        GPR_ASSERT(false);
    }

    // Set closed_loop_ based on whether or not random_dist is set
    if (!random_dist) {
      closed_loop_ = true;
    } else {
      closed_loop_ = false;
      // set up interarrival timer according to random dist
      interarrival_timer_.init(*random_dist, num_threads);
      const auto now = gpr_now(GPR_CLOCK_MONOTONIC);
      for (size_t i = 0; i < num_threads; i++) {
        next_time_.push_back(gpr_time_add(
            now,
            gpr_time_from_nanos(interarrival_timer_.next(i), GPR_TIMESPAN)));
      }
    }
  }

  gpr_timespec NextIssueTime(int thread_idx) {
    const gpr_timespec result = next_time_[thread_idx];
    next_time_[thread_idx] =
        gpr_time_add(next_time_[thread_idx],
                     gpr_time_from_nanos(interarrival_timer_.next(thread_idx),
                                         GPR_TIMESPAN));
    return result;
  }
  std::function<gpr_timespec()> NextIssuer(int thread_idx) {
    return closed_loop_ ? std::function<gpr_timespec()>()
                        : std::bind(&Client::NextIssueTime, this, thread_idx);
  }

 private:
  class Thread {
   public:
    Thread(Client* client, size_t idx)
        : client_(client), idx_(idx), impl_(&Thread::ThreadFunc, this) {}

    ~Thread() { impl_.join(); }

    void BeginSwap(Histogram* n, StatusHistogram* s) {
      std::lock_guard<std::mutex> g(mu_);
      n->Swap(&histogram_);
      s->swap(statuses_);
    }

    void MergeStatsInto(Histogram* hist, StatusHistogram* s) {
      std::unique_lock<std::mutex> g(mu_);
      hist->Merge(histogram_);
      MergeStatusHistogram(statuses_, s);
    }

   private:
    Thread(const Thread&);
    Thread& operator=(const Thread&);

    void ThreadFunc() {
      while (!gpr_event_wait(
          &client_->start_requests_,
          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                       gpr_time_from_seconds(1, GPR_TIMESPAN)))) {
        gpr_log(GPR_INFO, "Waiting for benchmark to start");
      }

      for (;;) {
        // run the loop body
        HistogramEntry entry;
        const bool thread_still_ok = client_->ThreadFunc(&entry, idx_);
        // lock, update histogram if needed and see if we're done
        std::lock_guard<std::mutex> g(mu_);
        if (entry.value_used()) {
          histogram_.Add(entry.value());
        }
        if (entry.status_used()) {
          statuses_[entry.status()]++;
        }
        if (!thread_still_ok) {
          gpr_log(GPR_ERROR, "Finishing client thread due to RPC error");
        }
        if (!thread_still_ok ||
            static_cast<bool>(gpr_atm_acq_load(&client_->thread_pool_done_))) {
          client_->CompleteThread();
          return;
        }
      }
    }

    std::mutex mu_;
    Histogram histogram_;
    StatusHistogram statuses_;
    Client* client_;
    const size_t idx_;
    std::thread impl_;
  };

  std::vector<std::unique_ptr<Thread>> threads_;
  std::unique_ptr<UsageTimer> timer_;

  InterarrivalTimer interarrival_timer_;
  std::vector<gpr_timespec> next_time_;

  std::mutex thread_completion_mu_;
  size_t threads_remaining_;
  std::condition_variable threads_complete_;

  gpr_event start_requests_;
  bool started_requests_;

  void MaybeStartRequests() {
    if (!started_requests_) {
      started_requests_ = true;
      gpr_event_set(&start_requests_, (void*)1);
    }
  }

  void CompleteThread() {
    std::lock_guard<std::mutex> g(thread_completion_mu_);
    threads_remaining_--;
    if (threads_remaining_ == 0) {
      threads_complete_.notify_all();
    }
  }
};

template <class StubType, class RequestType>
class ClientImpl : public Client {
 public:
  ClientImpl(const ClientConfig& config,
             std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
                 create_stub)
      : cores_(LimitCores(config.core_list().data(), config.core_list_size())),
        channels_(config.client_channels()),
        create_stub_(create_stub) {
    for (int i = 0; i < config.client_channels(); i++) {
      channels_[i].init(config.server_targets(i % config.server_targets_size()),
                        config, create_stub_, i);
    }

    ClientRequestCreator<RequestType> create_req(&request_,
                                                 config.payload_config());
  }
  virtual ~ClientImpl() {}

 protected:
  const int cores_;
  RequestType request_;

  class ClientChannelInfo {
   public:
    ClientChannelInfo() {}
    ClientChannelInfo(const ClientChannelInfo& i) {
      // The copy constructor is to satisfy old compilers
      // that need it for using std::vector . It is only ever
      // used for empty entries
      GPR_ASSERT(!i.channel_ && !i.stub_);
    }
    void init(const grpc::string& target, const ClientConfig& config,
              std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
                  create_stub,
              int shard) {
      // We have to use a 2-phase init like this with a default
      // constructor followed by an initializer function to make
      // old compilers happy with using this in std::vector
      ChannelArguments args;
      args.SetInt("shard_to_ensure_no_subchannel_merges", shard);
      channel_ = CreateTestChannel(
          target, config.security_params().server_host_override(),
          config.has_security_params(), !config.security_params().use_test_ca(),
          std::shared_ptr<CallCredentials>(), args);
      gpr_log(GPR_INFO, "Connecting to %s", target.c_str());
      GPR_ASSERT(channel_->WaitForConnected(
          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                       gpr_time_from_seconds(300, GPR_TIMESPAN))));
      stub_ = create_stub(channel_);
    }
    Channel* get_channel() { return channel_.get(); }
    StubType* get_stub() { return stub_.get(); }

   private:
    std::shared_ptr<Channel> channel_;
    std::unique_ptr<StubType> stub_;
  };
  std::vector<ClientChannelInfo> channels_;
  std::function<std::unique_ptr<StubType>(const std::shared_ptr<Channel>&)>
      create_stub_;
};

std::unique_ptr<Client> CreateSynchronousUnaryClient(const ClientConfig& args);
std::unique_ptr<Client> CreateSynchronousStreamingClient(
    const ClientConfig& args);
std::unique_ptr<Client> CreateAsyncUnaryClient(const ClientConfig& args);
std::unique_ptr<Client> CreateAsyncStreamingClient(const ClientConfig& args);
std::unique_ptr<Client> CreateGenericAsyncStreamingClient(
    const ClientConfig& args);

}  // namespace testing
}  // namespace grpc

#endif