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grpc/test/cpp/microbenchmarks/bm_chttp2_transport.cc

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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/* Microbenchmarks around CHTTP2 transport operations */
#include <grpc++/support/channel_arguments.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <string.h>
#include <memory>
#include <queue>
#include <sstream>
extern "C" {
#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
#include "src/core/ext/transport/chttp2/transport/internal.h"
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/iomgr/resource_quota.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/transport/static_metadata.h"
}
#include "test/cpp/microbenchmarks/helpers.h"
#include "third_party/benchmark/include/benchmark/benchmark.h"
auto &force_library_initialization = Library::get();
////////////////////////////////////////////////////////////////////////////////
// Helper classes
//
class DummyEndpoint : public grpc_endpoint {
public:
DummyEndpoint() {
static const grpc_endpoint_vtable my_vtable = {
read, write, add_to_pollset, add_to_pollset_set,
shutdown, destroy, get_resource_user, get_peer,
get_fd};
grpc_endpoint::vtable = &my_vtable;
ru_ = grpc_resource_user_create(Library::get().rq(), "dummy_endpoint");
}
void PushInput(grpc_exec_ctx *exec_ctx, grpc_slice slice) {
if (read_cb_ == nullptr) {
GPR_ASSERT(!have_slice_);
buffered_slice_ = slice;
have_slice_ = true;
return;
}
grpc_slice_buffer_add(slices_, slice);
GRPC_CLOSURE_SCHED(exec_ctx, read_cb_, GRPC_ERROR_NONE);
read_cb_ = nullptr;
}
private:
grpc_resource_user *ru_;
grpc_closure *read_cb_ = nullptr;
grpc_slice_buffer *slices_ = nullptr;
bool have_slice_ = false;
grpc_slice buffered_slice_;
void QueueRead(grpc_exec_ctx *exec_ctx, grpc_slice_buffer *slices,
grpc_closure *cb) {
GPR_ASSERT(read_cb_ == nullptr);
if (have_slice_) {
have_slice_ = false;
grpc_slice_buffer_add(slices, buffered_slice_);
GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
return;
}
read_cb_ = cb;
slices_ = slices;
}
static void read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
static_cast<DummyEndpoint *>(ep)->QueueRead(exec_ctx, slices, cb);
}
static void write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
}
static grpc_workqueue *get_workqueue(grpc_endpoint *ep) { return NULL; }
static void add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset *pollset) {}
static void add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset_set *pollset) {}
static void shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_error *why) {
grpc_resource_user_shutdown(exec_ctx,
static_cast<DummyEndpoint *>(ep)->ru_);
GRPC_CLOSURE_SCHED(exec_ctx, static_cast<DummyEndpoint *>(ep)->read_cb_,
why);
}
static void destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
grpc_resource_user_unref(exec_ctx, static_cast<DummyEndpoint *>(ep)->ru_);
delete static_cast<DummyEndpoint *>(ep);
}
static grpc_resource_user *get_resource_user(grpc_endpoint *ep) {
return static_cast<DummyEndpoint *>(ep)->ru_;
}
static char *get_peer(grpc_endpoint *ep) { return gpr_strdup("test"); }
static int get_fd(grpc_endpoint *ep) { return 0; }
};
class Fixture {
public:
Fixture(const grpc::ChannelArguments &args, bool client) {
grpc_channel_args c_args = args.c_channel_args();
ep_ = new DummyEndpoint;
t_ = grpc_create_chttp2_transport(exec_ctx(), &c_args, ep_, client);
grpc_chttp2_transport_start_reading(exec_ctx(), t_, NULL);
FlushExecCtx();
}
void FlushExecCtx() { grpc_exec_ctx_flush(&exec_ctx_); }
~Fixture() {
grpc_transport_destroy(&exec_ctx_, t_);
grpc_exec_ctx_finish(&exec_ctx_);
}
grpc_chttp2_transport *chttp2_transport() {
return reinterpret_cast<grpc_chttp2_transport *>(t_);
}
grpc_transport *transport() { return t_; }
grpc_exec_ctx *exec_ctx() { return &exec_ctx_; }
void PushInput(grpc_slice slice) { ep_->PushInput(exec_ctx(), slice); }
private:
DummyEndpoint *ep_;
grpc_exec_ctx exec_ctx_ = GRPC_EXEC_CTX_INIT;
grpc_transport *t_;
};
class Closure : public grpc_closure {
public:
virtual ~Closure() {}
};
template <class F>
std::unique_ptr<Closure> MakeClosure(
F f, grpc_closure_scheduler *sched = grpc_schedule_on_exec_ctx) {
struct C : public Closure {
C(const F &f, grpc_closure_scheduler *sched) : f_(f) {
GRPC_CLOSURE_INIT(this, Execute, this, sched);
}
F f_;
static void Execute(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
static_cast<C *>(arg)->f_(exec_ctx, error);
}
};
return std::unique_ptr<Closure>(new C(f, sched));
}
template <class F>
grpc_closure *MakeOnceClosure(
F f, grpc_closure_scheduler *sched = grpc_schedule_on_exec_ctx) {
struct C : public grpc_closure {
C(const F &f) : f_(f) {}
F f_;
static void Execute(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
static_cast<C *>(arg)->f_(exec_ctx, error);
delete static_cast<C *>(arg);
}
};
auto *c = new C{f};
return GRPC_CLOSURE_INIT(c, C::Execute, c, sched);
}
class Stream {
public:
Stream(Fixture *f) : f_(f) {
stream_size_ = grpc_transport_stream_size(f->transport());
stream_ = gpr_malloc(stream_size_);
arena_ = gpr_arena_create(4096);
}
~Stream() {
gpr_event_wait(&done_, gpr_inf_future(GPR_CLOCK_REALTIME));
gpr_free(stream_);
gpr_arena_destroy(arena_);
}
void Init(benchmark::State &state) {
GRPC_STREAM_REF_INIT(&refcount_, 1, &Stream::FinishDestroy, this,
"test_stream");
gpr_event_init(&done_);
memset(stream_, 0, stream_size_);
if ((state.iterations() & 0xffff) == 0) {
gpr_arena_destroy(arena_);
arena_ = gpr_arena_create(4096);
}
grpc_transport_init_stream(f_->exec_ctx(), f_->transport(),
static_cast<grpc_stream *>(stream_), &refcount_,
NULL, arena_);
}
void DestroyThen(grpc_exec_ctx *exec_ctx, grpc_closure *closure) {
destroy_closure_ = closure;
#ifndef NDEBUG
grpc_stream_unref(exec_ctx, &refcount_, "DestroyThen");
#else
grpc_stream_unref(exec_ctx, &refcount_);
#endif
}
void Op(grpc_exec_ctx *exec_ctx, grpc_transport_stream_op_batch *op) {
grpc_transport_perform_stream_op(exec_ctx, f_->transport(),
static_cast<grpc_stream *>(stream_), op);
}
grpc_chttp2_stream *chttp2_stream() {
return static_cast<grpc_chttp2_stream *>(stream_);
}
private:
static void FinishDestroy(grpc_exec_ctx *exec_ctx, void *arg,
grpc_error *error) {
auto stream = static_cast<Stream *>(arg);
grpc_transport_destroy_stream(exec_ctx, stream->f_->transport(),
static_cast<grpc_stream *>(stream->stream_),
stream->destroy_closure_);
gpr_event_set(&stream->done_, (void *)1);
}
Fixture *f_;
grpc_stream_refcount refcount_;
gpr_arena *arena_;
size_t stream_size_;
void *stream_;
grpc_closure *destroy_closure_ = nullptr;
gpr_event done_;
};
////////////////////////////////////////////////////////////////////////////////
// Benchmarks
//
static void BM_StreamCreateDestroy(benchmark::State &state) {
TrackCounters track_counters;
Fixture f(grpc::ChannelArguments(), true);
Stream s(&f);
grpc_transport_stream_op_batch op;
grpc_transport_stream_op_batch_payload op_payload;
memset(&op, 0, sizeof(op));
op.cancel_stream = true;
op.payload = &op_payload;
op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
std::unique_ptr<Closure> next =
MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
if (!state.KeepRunning()) return;
s.Init(state);
s.Op(exec_ctx, &op);
s.DestroyThen(exec_ctx, next.get());
});
GRPC_CLOSURE_RUN(f.exec_ctx(), next.get(), GRPC_ERROR_NONE);
f.FlushExecCtx();
track_counters.Finish(state);
}
BENCHMARK(BM_StreamCreateDestroy);
class RepresentativeClientInitialMetadata {
public:
static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx *exec_ctx) {
return {
GRPC_MDELEM_SCHEME_HTTP, GRPC_MDELEM_METHOD_POST,
grpc_mdelem_from_slices(
exec_ctx, GRPC_MDSTR_PATH,
grpc_slice_intern(grpc_slice_from_static_string("/foo/bar"))),
grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
grpc_slice_intern(grpc_slice_from_static_string(
"foo.test.google.fr:1234"))),
GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP,
GRPC_MDELEM_TE_TRAILERS,
GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
grpc_mdelem_from_slices(
exec_ctx, GRPC_MDSTR_USER_AGENT,
grpc_slice_intern(grpc_slice_from_static_string(
"grpc-c/3.0.0-dev (linux; chttp2; green)")))};
}
};
template <class Metadata>
static void BM_StreamCreateSendInitialMetadataDestroy(benchmark::State &state) {
TrackCounters track_counters;
Fixture f(grpc::ChannelArguments(), true);
Stream s(&f);
grpc_transport_stream_op_batch op;
grpc_transport_stream_op_batch_payload op_payload;
memset(&op_payload, 0, sizeof(op_payload));
std::unique_ptr<Closure> start;
std::unique_ptr<Closure> done;
auto reset_op = [&]() {
memset(&op, 0, sizeof(op));
op.payload = &op_payload;
};
grpc_metadata_batch b;
grpc_metadata_batch_init(&b);
b.deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
std::vector<grpc_mdelem> elems = Metadata::GetElems(f.exec_ctx());
std::vector<grpc_linked_mdelem> storage(elems.size());
for (size_t i = 0; i < elems.size(); i++) {
GPR_ASSERT(GRPC_LOG_IF_ERROR(
"addmd",
grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
}
f.FlushExecCtx();
start = MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
if (!state.KeepRunning()) return;
s.Init(state);
reset_op();
op.on_complete = done.get();
op.send_initial_metadata = true;
op.payload->send_initial_metadata.send_initial_metadata = &b;
s.Op(exec_ctx, &op);
});
done = MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
reset_op();
op.cancel_stream = true;
op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
s.Op(exec_ctx, &op);
s.DestroyThen(exec_ctx, start.get());
});
GRPC_CLOSURE_SCHED(f.exec_ctx(), start.get(), GRPC_ERROR_NONE);
f.FlushExecCtx();
grpc_metadata_batch_destroy(f.exec_ctx(), &b);
track_counters.Finish(state);
}
BENCHMARK_TEMPLATE(BM_StreamCreateSendInitialMetadataDestroy,
RepresentativeClientInitialMetadata);
static void BM_TransportEmptyOp(benchmark::State &state) {
TrackCounters track_counters;
Fixture f(grpc::ChannelArguments(), true);
Stream s(&f);
s.Init(state);
grpc_transport_stream_op_batch op;
grpc_transport_stream_op_batch_payload op_payload;
memset(&op_payload, 0, sizeof(op_payload));
auto reset_op = [&]() {
memset(&op, 0, sizeof(op));
op.payload = &op_payload;
};
std::unique_ptr<Closure> c =
MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
if (!state.KeepRunning()) return;
reset_op();
op.on_complete = c.get();
s.Op(exec_ctx, &op);
});
GRPC_CLOSURE_SCHED(f.exec_ctx(), c.get(), GRPC_ERROR_NONE);
f.FlushExecCtx();
reset_op();
op.cancel_stream = true;
op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
s.Op(f.exec_ctx(), &op);
s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx *exec_ctx,
grpc_error *error) {}));
f.FlushExecCtx();
track_counters.Finish(state);
}
BENCHMARK(BM_TransportEmptyOp);
std::vector<std::unique_ptr<gpr_event>> done_events;
static void BM_TransportStreamSend(benchmark::State &state) {
TrackCounters track_counters;
Fixture f(grpc::ChannelArguments(), true);
auto s = std::unique_ptr<Stream>(new Stream(&f));
s->Init(state);
grpc_transport_stream_op_batch op;
grpc_transport_stream_op_batch_payload op_payload;
memset(&op_payload, 0, sizeof(op_payload));
auto reset_op = [&]() {
memset(&op, 0, sizeof(op));
op.payload = &op_payload;
};
grpc_slice_buffer_stream send_stream;
grpc_slice_buffer send_buffer;
grpc_slice_buffer_init(&send_buffer);
grpc_slice_buffer_add(&send_buffer, gpr_slice_malloc(state.range(0)));
memset(GRPC_SLICE_START_PTR(send_buffer.slices[0]), 0,
GRPC_SLICE_LENGTH(send_buffer.slices[0]));
grpc_metadata_batch b;
grpc_metadata_batch_init(&b);
b.deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
std::vector<grpc_mdelem> elems =
RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
std::vector<grpc_linked_mdelem> storage(elems.size());
for (size_t i = 0; i < elems.size(); i++) {
GPR_ASSERT(GRPC_LOG_IF_ERROR(
"addmd",
grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
}
gpr_event *bm_done = new gpr_event;
gpr_event_init(bm_done);
std::unique_ptr<Closure> c =
MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
if (!state.KeepRunning()) {
gpr_event_set(bm_done, (void *)1);
return;
}
// force outgoing window to be yuge
s->chttp2_stream()->flow_control.remote_window_delta =
1024 * 1024 * 1024;
f.chttp2_transport()->flow_control.remote_window = 1024 * 1024 * 1024;
grpc_slice_buffer_stream_init(&send_stream, &send_buffer, 0);
reset_op();
op.on_complete = c.get();
op.send_message = true;
op.payload->send_message.send_message = &send_stream.base;
s->Op(exec_ctx, &op);
});
reset_op();
op.send_initial_metadata = true;
op.payload->send_initial_metadata.send_initial_metadata = &b;
op.on_complete = c.get();
s->Op(f.exec_ctx(), &op);
f.FlushExecCtx();
gpr_event_wait(bm_done, gpr_inf_future(GPR_CLOCK_REALTIME));
done_events.emplace_back(bm_done);
reset_op();
op.cancel_stream = true;
op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
s->Op(f.exec_ctx(), &op);
s->DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx *exec_ctx,
grpc_error *error) {}));
f.FlushExecCtx();
s.reset();
track_counters.Finish(state);
grpc_metadata_batch_destroy(f.exec_ctx(), &b);
grpc_slice_buffer_destroy(&send_buffer);
}
BENCHMARK(BM_TransportStreamSend)->Range(0, 128 * 1024 * 1024);
#define SLICE_FROM_BUFFER(s) grpc_slice_from_static_buffer(s, sizeof(s) - 1)
static grpc_slice CreateIncomingDataSlice(size_t length, size_t frame_size) {
std::queue<char> unframed;
unframed.push(static_cast<uint8_t>(0));
unframed.push(static_cast<uint8_t>(length >> 24));
unframed.push(static_cast<uint8_t>(length >> 16));
unframed.push(static_cast<uint8_t>(length >> 8));
unframed.push(static_cast<uint8_t>(length));
for (size_t i = 0; i < length; i++) {
unframed.push('a');
}
std::vector<char> framed;
while (unframed.size() > frame_size) {
// frame size
framed.push_back(static_cast<uint8_t>(frame_size >> 16));
framed.push_back(static_cast<uint8_t>(frame_size >> 8));
framed.push_back(static_cast<uint8_t>(frame_size));
// data frame
framed.push_back(0);
// no flags
framed.push_back(0);
// stream id
framed.push_back(0);
framed.push_back(0);
framed.push_back(0);
framed.push_back(1);
// frame data
for (size_t i = 0; i < frame_size; i++) {
framed.push_back(unframed.front());
unframed.pop();
}
}
// frame size
framed.push_back(static_cast<uint8_t>(unframed.size() >> 16));
framed.push_back(static_cast<uint8_t>(unframed.size() >> 8));
framed.push_back(static_cast<uint8_t>(unframed.size()));
// data frame
framed.push_back(0);
// no flags
framed.push_back(0);
// stream id
framed.push_back(0);
framed.push_back(0);
framed.push_back(0);
framed.push_back(1);
while (!unframed.empty()) {
framed.push_back(unframed.front());
unframed.pop();
}
return grpc_slice_from_copied_buffer(framed.data(), framed.size());
}
static void BM_TransportStreamRecv(benchmark::State &state) {
TrackCounters track_counters;
Fixture f(grpc::ChannelArguments(), true);
Stream s(&f);
s.Init(state);
grpc_transport_stream_op_batch_payload op_payload;
memset(&op_payload, 0, sizeof(op_payload));
grpc_transport_stream_op_batch op;
grpc_byte_stream *recv_stream;
grpc_slice incoming_data = CreateIncomingDataSlice(state.range(0), 16384);
auto reset_op = [&]() {
memset(&op, 0, sizeof(op));
op.payload = &op_payload;
};
grpc_metadata_batch b;
grpc_metadata_batch_init(&b);
grpc_metadata_batch b_recv;
grpc_metadata_batch_init(&b_recv);
b.deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
std::vector<grpc_mdelem> elems =
RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
std::vector<grpc_linked_mdelem> storage(elems.size());
for (size_t i = 0; i < elems.size(); i++) {
GPR_ASSERT(GRPC_LOG_IF_ERROR(
"addmd",
grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
}
std::unique_ptr<Closure> do_nothing =
MakeClosure([](grpc_exec_ctx *exec_ctx, grpc_error *error) {});
uint32_t received;
std::unique_ptr<Closure> drain_start;
std::unique_ptr<Closure> drain;
std::unique_ptr<Closure> drain_continue;
grpc_slice recv_slice;
std::unique_ptr<Closure> c = MakeClosure([&](grpc_exec_ctx *exec_ctx,
grpc_error *error) {
if (!state.KeepRunning()) return;
// force outgoing window to be yuge
s.chttp2_stream()->flow_control.local_window_delta = 1024 * 1024 * 1024;
s.chttp2_stream()->flow_control.announced_window_delta = 1024 * 1024 * 1024;
f.chttp2_transport()->flow_control.announced_window = 1024 * 1024 * 1024;
received = 0;
reset_op();
op.on_complete = do_nothing.get();
op.recv_message = true;
op.payload->recv_message.recv_message = &recv_stream;
op.payload->recv_message.recv_message_ready = drain_start.get();
s.Op(exec_ctx, &op);
f.PushInput(grpc_slice_ref(incoming_data));
});
drain_start = MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
if (recv_stream == NULL) {
GPR_ASSERT(!state.KeepRunning());
return;
}
GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
});
drain = MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
do {
if (received == recv_stream->length) {
grpc_byte_stream_destroy(exec_ctx, recv_stream);
GRPC_CLOSURE_SCHED(exec_ctx, c.get(), GRPC_ERROR_NONE);
return;
}
} while (grpc_byte_stream_next(exec_ctx, recv_stream,
recv_stream->length - received,
drain_continue.get()) &&
GRPC_ERROR_NONE ==
grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice) &&
(received += GRPC_SLICE_LENGTH(recv_slice),
grpc_slice_unref_internal(exec_ctx, recv_slice), true));
});
drain_continue = MakeClosure([&](grpc_exec_ctx *exec_ctx, grpc_error *error) {
grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice);
received += GRPC_SLICE_LENGTH(recv_slice);
grpc_slice_unref_internal(exec_ctx, recv_slice);
GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
});
reset_op();
op.send_initial_metadata = true;
op.payload->send_initial_metadata.send_initial_metadata = &b;
op.recv_initial_metadata = true;
op.payload->recv_initial_metadata.recv_initial_metadata = &b_recv;
op.payload->recv_initial_metadata.recv_initial_metadata_ready =
do_nothing.get();
op.on_complete = c.get();
s.Op(f.exec_ctx(), &op);
f.PushInput(SLICE_FROM_BUFFER(
"\x00\x00\x00\x04\x00\x00\x00\x00\x00"
// Generated using:
// tools/codegen/core/gen_header_frame.py <
// test/cpp/microbenchmarks/representative_server_initial_metadata.headers
"\x00\x00X\x01\x04\x00\x00\x00\x01"
"\x10\x07:status\x03"
"200"
"\x10\x0c"
"content-type\x10"
"application/grpc"
"\x10\x14grpc-accept-encoding\x15identity,deflate,gzip"));
f.FlushExecCtx();
reset_op();
op.cancel_stream = true;
op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
s.Op(f.exec_ctx(), &op);
s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx *exec_ctx,
grpc_error *error) {}));
f.FlushExecCtx();
track_counters.Finish(state);
grpc_metadata_batch_destroy(f.exec_ctx(), &b);
grpc_metadata_batch_destroy(f.exec_ctx(), &b_recv);
grpc_slice_unref(incoming_data);
}
BENCHMARK(BM_TransportStreamRecv)->Range(0, 128 * 1024 * 1024);
BENCHMARK_MAIN();