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Issue 2310543002: Limits only 16 new QUIC connections can be opened per epoll event. (Closed)
Patch Set: Limits only 16 new QUIC connections can be opened per epoll event. Created 4 years, 3 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "net/tools/quic/quic_server.h" 5 #include "net/tools/quic/quic_server.h"
6 6
7 #include <errno.h> 7 #include <errno.h>
8 #include <features.h> 8 #include <features.h>
9 #include <netinet/in.h> 9 #include <netinet/in.h>
10 #include <string.h> 10 #include <string.h>
(...skipping 30 matching lines...) Expand all
41 // Specifies the directory used during QuicInMemoryCache 41 // Specifies the directory used during QuicInMemoryCache
42 // construction to seed the cache. Cache directory can be 42 // construction to seed the cache. Cache directory can be
43 // generated using `wget -p --save-headers <url>` 43 // generated using `wget -p --save-headers <url>`
44 std::string FLAGS_quic_in_memory_cache_dir = ""; 44 std::string FLAGS_quic_in_memory_cache_dir = "";
45 45
46 const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET; 46 const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET;
47 const char kSourceAddressTokenSecret[] = "secret"; 47 const char kSourceAddressTokenSecret[] = "secret";
48 48
49 } // namespace 49 } // namespace
50 50
51 const size_t kNumSessionsToCreatePerSocketEvent = 16;
52
51 QuicServer::QuicServer(std::unique_ptr<ProofSource> proof_source) 53 QuicServer::QuicServer(std::unique_ptr<ProofSource> proof_source)
52 : QuicServer(std::move(proof_source), 54 : QuicServer(std::move(proof_source),
53 QuicConfig(), 55 QuicConfig(),
54 QuicCryptoServerConfig::ConfigOptions(), 56 QuicCryptoServerConfig::ConfigOptions(),
55 AllSupportedVersions()) {} 57 AllSupportedVersions()) {}
56 58
57 QuicServer::QuicServer( 59 QuicServer::QuicServer(
58 std::unique_ptr<ProofSource> proof_source, 60 std::unique_ptr<ProofSource> proof_source,
59 const QuicConfig& config, 61 const QuicConfig& config,
60 const QuicCryptoServerConfig::ConfigOptions& crypto_config_options, 62 const QuicCryptoServerConfig::ConfigOptions& crypto_config_options,
(...skipping 109 matching lines...) Expand 10 before | Expand all | Expand 10 after
170 close(fd_); 172 close(fd_);
171 fd_ = -1; 173 fd_ = -1;
172 } 174 }
173 175
174 void QuicServer::OnEvent(int fd, EpollEvent* event) { 176 void QuicServer::OnEvent(int fd, EpollEvent* event) {
175 DCHECK_EQ(fd, fd_); 177 DCHECK_EQ(fd, fd_);
176 event->out_ready_mask = 0; 178 event->out_ready_mask = 0;
177 179
178 if (event->in_events & EPOLLIN) { 180 if (event->in_events & EPOLLIN) {
179 DVLOG(1) << "EPOLLIN"; 181 DVLOG(1) << "EPOLLIN";
182
183 if (FLAGS_quic_limit_num_new_sessions_per_epoll_loop &&
184 FLAGS_quic_buffer_packet_till_chlo) {
185 dispatcher_->ProcessBufferedChlos(kNumSessionsToCreatePerSocketEvent);
186 }
187
180 bool more_to_read = true; 188 bool more_to_read = true;
181 while (more_to_read) { 189 while (more_to_read) {
182 more_to_read = packet_reader_->ReadAndDispatchPackets( 190 more_to_read = packet_reader_->ReadAndDispatchPackets(
183 fd_, port_, false /* potentially_small_mtu */, 191 fd_, port_, false /* potentially_small_mtu */,
184 QuicEpollClock(&epoll_server_), dispatcher_.get(), 192 QuicEpollClock(&epoll_server_), dispatcher_.get(),
185 overflow_supported_ ? &packets_dropped_ : nullptr); 193 overflow_supported_ ? &packets_dropped_ : nullptr);
186 } 194 }
195
196 if (FLAGS_quic_limit_num_new_sessions_per_epoll_loop &&
197 FLAGS_quic_buffer_packet_till_chlo && dispatcher_->HasChlosBuffered()) {
198 // Register EPOLLIN event to consume buffered CHLO(s).
199 event->out_ready_mask |= EPOLLIN;
200 }
187 } 201 }
188 if (event->in_events & EPOLLOUT) { 202 if (event->in_events & EPOLLOUT) {
189 dispatcher_->OnCanWrite(); 203 dispatcher_->OnCanWrite();
190 if (dispatcher_->HasPendingWrites()) { 204 if (dispatcher_->HasPendingWrites()) {
191 event->out_ready_mask |= EPOLLOUT; 205 event->out_ready_mask |= EPOLLOUT;
192 } 206 }
193 } 207 }
194 if (event->in_events & EPOLLERR) { 208 if (event->in_events & EPOLLERR) {
195 } 209 }
196 } 210 }
197 211
198 } // namespace net 212 } // namespace net
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