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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 // The eviction policy is a very simple pure LRU, so the elements at the end of | 5 // The eviction policy is a very simple pure LRU, so the elements at the end of |
6 // the list are evicted until kCleanUpMargin free space is available. There is | 6 // the list are evicted until kCleanUpMargin free space is available. There is |
7 // only one list in use (Rankings::NO_USE), and elements are sent to the front | 7 // only one list in use (Rankings::NO_USE), and elements are sent to the front |
8 // of the list whenever they are accessed. | 8 // of the list whenever they are accessed. |
9 | 9 |
10 // The new (in-development) eviction policy adds re-use as a factor to evict | 10 // The new (in-development) eviction policy adds re-use as a factor to evict |
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26 // size so that we have a chance to see an element again and move it to another | 26 // size so that we have a chance to see an element again and move it to another |
27 // list. | 27 // list. |
28 | 28 |
29 #include "net/disk_cache/eviction.h" | 29 #include "net/disk_cache/eviction.h" |
30 | 30 |
31 #include "base/bind.h" | 31 #include "base/bind.h" |
32 #include "base/compiler_specific.h" | 32 #include "base/compiler_specific.h" |
33 #include "base/logging.h" | 33 #include "base/logging.h" |
34 #include "base/message_loop.h" | 34 #include "base/message_loop.h" |
35 #include "base/strings/string_util.h" | 35 #include "base/strings/string_util.h" |
36 #include "base/time.h" | 36 #include "base/time/time.h" |
37 #include "net/disk_cache/backend_impl.h" | 37 #include "net/disk_cache/backend_impl.h" |
38 #include "net/disk_cache/disk_format.h" | 38 #include "net/disk_cache/disk_format.h" |
39 #include "net/disk_cache/entry_impl.h" | 39 #include "net/disk_cache/entry_impl.h" |
40 #include "net/disk_cache/experiments.h" | 40 #include "net/disk_cache/experiments.h" |
41 #include "net/disk_cache/histogram_macros.h" | 41 #include "net/disk_cache/histogram_macros.h" |
42 #include "net/disk_cache/trace.h" | 42 #include "net/disk_cache/trace.h" |
43 | 43 |
44 using base::Time; | 44 using base::Time; |
45 using base::TimeTicks; | 45 using base::TimeTicks; |
46 | 46 |
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588 Time::FromInternalValue(last2.get()->Data()->last_used)); | 588 Time::FromInternalValue(last2.get()->Data()->last_used)); |
589 if (last3.get()) | 589 if (last3.get()) |
590 CACHE_UMA(AGE, "HighUseAge", 0, | 590 CACHE_UMA(AGE, "HighUseAge", 0, |
591 Time::FromInternalValue(last3.get()->Data()->last_used)); | 591 Time::FromInternalValue(last3.get()->Data()->last_used)); |
592 if (last4.get()) | 592 if (last4.get()) |
593 CACHE_UMA(AGE, "DeletedAge", 0, | 593 CACHE_UMA(AGE, "DeletedAge", 0, |
594 Time::FromInternalValue(last4.get()->Data()->last_used)); | 594 Time::FromInternalValue(last4.get()->Data()->last_used)); |
595 } | 595 } |
596 | 596 |
597 } // namespace disk_cache | 597 } // namespace disk_cache |
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