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Contents
// Copyright 2023 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.
#include <grpc/support/port_platform.h>
#include "src/core/ext/transport/chttp2/transport/write_size_policy.h"
#include <algorithm>
#include <grpc/support/log.h>
namespace grpc_core {
size_t Chttp2WriteSizePolicy::WriteTargetSize() { return current_target_; }
void Chttp2WriteSizePolicy::BeginWrite(size_t size) {
GPR_ASSERT(experiment_start_time_ == Timestamp::InfFuture());
if (size < current_target_ * 7 / 10) {
// If we were trending fast but stopped getting enough data to verify, then
// reset back to the default state.
if (state_ < 0) state_ = 0;
return;
}
experiment_start_time_ = Timestamp::Now();
}
void Chttp2WriteSizePolicy::EndWrite(bool success) {
if (experiment_start_time_ == Timestamp::InfFuture()) return;
const auto elapsed = Timestamp::Now() - experiment_start_time_;
experiment_start_time_ = Timestamp::InfFuture();
if (!success) return;
if (elapsed < FastWrite()) {
--state_;
if (state_ == -2) {
state_ = 0;
current_target_ = std::min(current_target_ * 3 / 2, MaxTarget());
}
} else if (elapsed > SlowWrite()) {
++state_;
if (state_ == 2) {
state_ = 0;
current_target_ = std::max(current_target_ / 3, MinTarget());
}
} else {
state_ = 0;
}
}
} // namespace grpc_core
Version data entries
13 entries across 13 versions & 1 rubygems