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LoadTiming implementation in net, part 1.
Calculate connection timing information in ConnectJobs, add store it in ClientSocketHandles. BUG=77446 Review URL: https://codereview.chromium.org/11428150 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@175412 0039d316-1c4b-4281-b951-d872f2087c98
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mmenke@chromium.org
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Jan 7, 2013
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| // Copyright (c) 2012 The Chromium Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| #include "net/base/load_timing_info.h" | ||
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| #include "net/base/net_log.h" | ||
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| namespace net { | ||
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| LoadTimingInfo::ConnectTiming::ConnectTiming() {} | ||
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| LoadTimingInfo::ConnectTiming::~ConnectTiming() {} | ||
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| LoadTimingInfo::LoadTimingInfo() : socket_reused(false), | ||
| socket_log_id(NetLog::Source::kInvalidId) { | ||
| } | ||
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| LoadTimingInfo::~LoadTimingInfo() {} | ||
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| } // namespace net | ||
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| // Copyright (c) 2012 The Chromium Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| #ifndef NET_BASE_LOAD_TIMING_INFO_H_ | ||
| #define NET_BASE_LOAD_TIMING_INFO_H_ | ||
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| #include "base/basictypes.h" | ||
| #include "base/time.h" | ||
| #include "net/base/net_export.h" | ||
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| namespace net { | ||
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| // All events that do not apply to a request have null times. For non-HTTP | ||
| // requests, all times other than the request_start times are null. | ||
| // | ||
| // The general order for events is: | ||
| // request_start | ||
| // proxy_start | ||
| // proxy_end | ||
| // *dns_start | ||
| // *dns_end | ||
| // *connect_start | ||
| // *ssl_start | ||
| // *ssl_end | ||
| // *connect_end | ||
| // send_start | ||
| // send_end | ||
| // receive_headers_end | ||
| // | ||
| // Those times without an asterisk are computed by the URLRequest, or by objects | ||
| // it directly creates and always owns. Those with an asterisk are computed | ||
| // by the connection attempt itself. Since the connection attempt may be | ||
| // started before a URLRequest, the starred times may occur before, during, or | ||
| // after the request_start and proxy events. | ||
| struct NET_EXPORT LoadTimingInfo { | ||
| // Contains the LoadTimingInfo events related to establishing a connection. | ||
| // These are all set by ConnectJobs. | ||
| struct NET_EXPORT_PRIVATE ConnectTiming { | ||
| ConnectTiming(); | ||
| ~ConnectTiming(); | ||
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| // The time spent looking up the host's DNS address. Null for requests that | ||
| // used proxies to look up the DNS address. Also null for SOCKS4 proxies, | ||
| // since the DNS address is only looked up after the connection is | ||
| // established, which results in unexpected event ordering. | ||
| // TODO(mmenke): The SOCKS4 event ordering could be refactored to allow | ||
| // these times to be non-null. | ||
| base::TimeTicks dns_start; | ||
| base::TimeTicks dns_end; | ||
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| // The time spent establishing the connection. Connect time includes proxy | ||
| // connect times (Though not proxy_resolve times), DNS lookup times, time | ||
| // spent waiting in certain queues, TCP, and SSL time. | ||
| // TODO(mmenke): For proxies, this includes time spent blocking on higher | ||
| // level socket pools. Fix this. | ||
| // TODO(mmenke): Retried connections to the same server should apparently | ||
| // be included in this time. Consider supporting that. | ||
| // Since the network stack has multiple notions of a "retry", | ||
| // handled at different levels, this may not be worth | ||
| // worrying about - backup jobs, reused socket failure, | ||
| // multiple round authentication. | ||
| base::TimeTicks connect_start; | ||
| base::TimeTicks connect_end; | ||
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| // The time when the SSL handshake started / completed. For non-HTTPS | ||
| // requests these are null. These times are only for the SSL connection to | ||
| // the final destination server, not an SSL/SPDY proxy. | ||
| base::TimeTicks ssl_start; | ||
| base::TimeTicks ssl_end; | ||
| }; | ||
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| LoadTimingInfo(); | ||
| ~LoadTimingInfo(); | ||
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| // True if the socket was reused. When true, DNS, connect, and SSL times | ||
| // will all be null. When false, those times may be null, too, for non-HTTP | ||
| // requests, or when they don't apply to a request. | ||
| bool socket_reused; | ||
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| // Unique socket ID, can be used to identify requests served by the same | ||
| // socket. | ||
| // TODO(mmenke): Do something reasonable for SPDY proxies. | ||
| uint32 socket_log_id; | ||
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| // Start time as a base::Time, so times can be coverted into actual times. | ||
| // Other times are recorded as TimeTicks so they are not affected by clock | ||
| // changes. | ||
| base::Time request_start_time; | ||
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| base::TimeTicks request_start; | ||
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| // The time spent determing which proxy to use. Null when there is no PAC. | ||
| base::TimeTicks proxy_resolve_start; | ||
| base::TimeTicks proxy_resolve_end; | ||
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| ConnectTiming connect_timing; | ||
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| // The time that sending HTTP request started / ended. | ||
| base::TimeTicks send_start; | ||
| base::TimeTicks send_end; | ||
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| // The time at which the end of the HTTP headers were received. | ||
| base::TimeTicks receive_headers_end; | ||
| }; | ||
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| } // namespace net | ||
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| #endif // NET_BASE_LOAD_TIMING_INFO_H_ |
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