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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrMemoryPool.h"
#include "SkBenchmark.h"
#include "SkRandom.h"
#include "SkTScopedPtr.h"
#include "SkTDArray.h"
// change this to 0 to compare GrMemoryPool to default new / delete
#define OVERRIDE_NEW 1
namespace {
struct A {
int gStuff[10];
#if OVERRIDE_NEW
void* operator new (size_t size) { return gPool.allocate(size); }
void operator delete (void* mem) { if (mem) { return gPool.release(mem); } }
#endif
static GrMemoryPool gPool;
};
GrMemoryPool A::gPool(10 * (1 << 10), 10 * (1 << 10));
}
/**
* This benchmark creates and deletes objects in stack order
*/
class GrMemoryPoolBenchStack : public SkBenchmark {
enum {
N = SkBENCHLOOP(5 * (1 << 20)),
};
public:
GrMemoryPoolBenchStack(void* param) : INHERITED(param) {
}
protected:
virtual const char* onGetName() {
return "grmemorypool_stack";
}
virtual void onDraw(SkCanvas* canvas) {
SkRandom r;
enum {
kMaxObjects = 4 * (1 << 10),
};
A* objects[kMaxObjects];
// We delete if a random [-1, 1] fixed pt is < the thresh. Otherwise,
// we allocate. We start allocate-biased and ping-pong to delete-biased
SkFixed delThresh = -SK_FixedHalf;
enum {
kSwitchThreshPeriod = N / (2 * kMaxObjects),
};
int s = 0;
int count = 0;
for (int i = 0; i < N; i++, ++s) {
if (kSwitchThreshPeriod == s) {
delThresh = -delThresh;
s = 0;
}
SkFixed del = r.nextSFixed1();
if (count &&
(kMaxObjects == count || del < delThresh)) {
delete objects[count-1];
--count;
} else {
objects[count] = new A;
++count;
}
}
for (int i = 0; i < count; ++i) {
delete objects[i];
}
}
private:
typedef SkBenchmark INHERITED;
};
/**
* This benchmark creates objects and deletes them in random order
*/
class GrMemoryPoolBenchRandom : public SkBenchmark {
enum {
N = SkBENCHLOOP(5 * (1 << 20)),
};
public:
GrMemoryPoolBenchRandom(void* param) : INHERITED(param) {
}
protected:
virtual const char* onGetName() {
return "grmemorypool_random";
}
virtual void onDraw(SkCanvas* canvas) {
SkRandom r;
enum {
kMaxObjects = 4 * (1 << 10),
};
SkTScopedPtr<A> objects[kMaxObjects];
for (int i = 0; i < N; i++) {
uint32_t idx = r.nextRangeU(0, kMaxObjects-1);
if (NULL == objects[idx].get()) {
objects[idx].reset(new A);
} else {
objects[idx].reset(NULL);
}
}
}
private:
typedef SkBenchmark INHERITED;
};
/**
* This benchmark creates objects and deletes them in queue order
*/
class GrMemoryPoolBenchQueue : public SkBenchmark {
enum {
N = SkBENCHLOOP((1 << 10)),
M = SkBENCHLOOP(4 * (1 << 10)),
};
public:
GrMemoryPoolBenchQueue(void* param) : INHERITED(param) {
}
protected:
virtual const char* onGetName() {
return "grmemorypool_queue";
}
virtual void onDraw(SkCanvas* canvas) {
SkRandom r;
A* objects[M];
for (int i = 0; i < N; i++) {
uint32_t count = r.nextRangeU(0, M-1);
for (uint32_t i = 0; i < count; i++) {
objects[i] = new A;
}
for (uint32_t i = 0; i < count; i++) {
delete objects[i];
}
}
}
private:
typedef SkBenchmark INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static SkBenchmark* Fact1(void* p) { return new GrMemoryPoolBenchStack(p); }
static SkBenchmark* Fact2(void* p) { return new GrMemoryPoolBenchRandom(p); }
static SkBenchmark* Fact3(void* p) { return new GrMemoryPoolBenchQueue(p); }
static BenchRegistry gReg01(Fact1);
static BenchRegistry gReg02(Fact2);
static BenchRegistry gReg03(Fact3);
|
