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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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/base/network_quality_estimator.h" | 5 #include "net/base/network_quality_estimator.h" |
6 | 6 |
7 #include <float.h> | 7 #include <float.h> |
8 #include <algorithm> | 8 #include <algorithm> |
9 #include <cmath> | 9 #include <cmath> |
10 #include <limits> | 10 #include <limits> |
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395 | 395 |
396 // Record all the RTT observations. | 396 // Record all the RTT observations. |
397 base::HistogramBase* rtt_observations = | 397 base::HistogramBase* rtt_observations = |
398 GetHistogram("RTTObservations.", current_network_id_.type, | 398 GetHistogram("RTTObservations.", current_network_id_.type, |
399 10 * 1000); // 10 seconds upper bound | 399 10 * 1000); // 10 seconds upper bound |
400 rtt_observations->Add(actual_value_msec); | 400 rtt_observations->Add(actual_value_msec); |
401 | 401 |
402 if (actual_value_msec == 0) | 402 if (actual_value_msec == 0) |
403 return; | 403 return; |
404 | 404 |
405 int32 ratio = (estimated_value_msec * 100) / actual_value_msec; | 405 int32_t ratio = (estimated_value_msec * 100) / actual_value_msec; |
406 | 406 |
407 // Record the accuracy of estimation by recording the ratio of estimated | 407 // Record the accuracy of estimation by recording the ratio of estimated |
408 // value to the actual value. | 408 // value to the actual value. |
409 base::HistogramBase* ratio_median_rtt = GetHistogram( | 409 base::HistogramBase* ratio_median_rtt = GetHistogram( |
410 "RatioEstimatedToActualRTT.", current_network_id_.type, 1000); | 410 "RatioEstimatedToActualRTT.", current_network_id_.type, 1000); |
411 ratio_median_rtt->Add(ratio); | 411 ratio_median_rtt->Add(ratio); |
412 } | 412 } |
413 | 413 |
414 bool NetworkQualityEstimator::RequestProvidesUsefulObservations( | 414 bool NetworkQualityEstimator::RequestProvidesUsefulObservations( |
415 const URLRequest& request) const { | 415 const URLRequest& request) const { |
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1002 | 1002 |
1003 NetworkQualityEstimator::NetworkQuality& | 1003 NetworkQualityEstimator::NetworkQuality& |
1004 NetworkQualityEstimator::NetworkQuality:: | 1004 NetworkQualityEstimator::NetworkQuality:: |
1005 operator=(const NetworkQuality& other) { | 1005 operator=(const NetworkQuality& other) { |
1006 rtt_ = other.rtt_; | 1006 rtt_ = other.rtt_; |
1007 downstream_throughput_kbps_ = other.downstream_throughput_kbps_; | 1007 downstream_throughput_kbps_ = other.downstream_throughput_kbps_; |
1008 return *this; | 1008 return *this; |
1009 } | 1009 } |
1010 | 1010 |
1011 } // namespace net | 1011 } // namespace net |
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