1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (C) 2012 Google Inc. All rights reserved.
* (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "MemoryUsageSupport.h"
#include "JSDOMWindow.h"
#include <runtime/MemoryStatistics.h>
#include <wtf/FastMalloc.h>
#if OS(LINUX)
#include <malloc.h>
#endif
namespace WebCore {
#if OS(LINUX)
static size_t mallocMemoryUsage(bool inuse)
{
// Return how much memory (in bytes) has been allocated on the system heap.
struct mallinfo minfo = ::mallinfo();
// If we want the internal memory usage, we subtract the memory used by
// free blocks. That is memory allocated from the system by malloc but
// which malloc considers free.
return minfo.arena - (inuse ? minfo.fordblks : 0);
}
#else
static size_t mallocMemoryUsage(bool)
{
// FIXME: Implement for other supported OS's.
return 0;
}
#endif
// This is how much system-memory we use.
static int memoryUsageKB()
{
size_t mallocUsage = mallocMemoryUsage(false);
WTF::FastMallocStatistics fmStats = WTF::fastMallocStatistics();
// Extract memory statistics from JavaScriptCore:
JSC::GlobalMemoryStatistics jscStats = JSC::globalMemoryStatistics();
size_t jscHeapUsage = JSDOMWindow::commonJSGlobalData()->heap.capacity();
return (mallocUsage + fmStats.committedVMBytes + jscStats.stackBytes + jscStats.JITBytes + jscHeapUsage) >> 10;
}
// This is how much memory we use internally, not including memory only reserved from the system.
static int actualMemoryUsageKB()
{
size_t mallocUsage = mallocMemoryUsage(true);
WTF::FastMallocStatistics fmStats = WTF::fastMallocStatistics();
// Extract memory statistics from JavaScriptCore:
JSC::GlobalMemoryStatistics jscStats = JSC::globalMemoryStatistics();
size_t jscHeapUsage = JSDOMWindow::commonJSGlobalData()->heap.size();
return (mallocUsage + fmStats.committedVMBytes - fmStats.freeListBytes + jscStats.stackBytes + jscStats.JITBytes + jscHeapUsage) >> 10;
}
int MemoryUsageSupport::memoryUsageMB()
{
return memoryUsageKB() >> 10;
}
int MemoryUsageSupport::actualMemoryUsageMB()
{
return actualMemoryUsageKB() >> 10;
}
// FIXME: These values should be determined based on hardware or set by the application.
static const unsigned normalMemoryWatermark = 128; // Chromium default: 256
static const unsigned highMemoryWatermark = 256; // Chromium default: 1024
static const unsigned highMemoryDelta = 64; // Chromium default: 128
int MemoryUsageSupport::lowMemoryUsageMB()
{
return normalMemoryWatermark;
}
int MemoryUsageSupport::highMemoryUsageMB()
{
return highMemoryWatermark;
}
int MemoryUsageSupport::highUsageDeltaMB()
{
return highMemoryDelta;
}
bool MemoryUsageSupport::processMemorySizesInBytes(size_t*, size_t*)
{
// FIXME: Not implemented.
return false;
}
void MemoryUsageSupport::memoryUsageByComponents(Vector<ComponentInfo>&)
{
}
} // namespace WebCore
|
