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/*
* 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 "SkTypes.h"
#include "Benchmark.h"
#include "GrMemoryPool.h"
#include "SkRandom.h"
#include "SkTDArray.h"
#include "SkTemplates.h"
#include <new>
// change this to 0 to compare GrMemoryPool to default new / delete
#define OVERRIDE_NEW 1
struct A {
int gStuff[10];
#if OVERRIDE_NEW
void* operator new (size_t size) { return gBenchPool.allocate(size); }
void operator delete (void* mem) { if (mem) { return gBenchPool.release(mem); } }
#endif
static GrMemoryPool gBenchPool;
};
GrMemoryPool A::gBenchPool(10 * (1 << 10), 10 * (1 << 10));
/**
* This benchmark creates and deletes objects in stack order
*/
class GrMemoryPoolBenchStack : public Benchmark {
public:
bool isSuitableFor(Backend backend) override {
return backend == kNonRendering_Backend;
}
protected:
const char* onGetName() override {
return "grmemorypool_stack";
}
void onDraw(int loops, SkCanvas*) override {
SkRandom r;
enum {
kMaxObjects = 4 * (1 << 10),
};
A* objects[kMaxObjects];
// We delete if a random number [-1, 1] is < the thresh. Otherwise,
// we allocate. We start allocate-biased and ping-pong to delete-biased
SkScalar delThresh = -SK_ScalarHalf;
const int kSwitchThreshPeriod = loops / (2 * kMaxObjects);
int s = 0;
int count = 0;
for (int i = 0; i < loops; i++, ++s) {
if (kSwitchThreshPeriod == s) {
delThresh = -delThresh;
s = 0;
}
SkScalar del = r.nextSScalar1();
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 Benchmark INHERITED;
};
struct B {
int gStuff[10];
#if OVERRIDE_NEW
void* operator new (size_t size) { return gBenchPool.allocate(size); }
void operator delete (void* mem) { if (mem) { return gBenchPool.release(mem); } }
#endif
static GrMemoryPool gBenchPool;
};
GrMemoryPool B::gBenchPool(10 * (1 << 10), 10 * (1 << 10));
/**
* This benchmark creates objects and deletes them in random order
*/
class GrMemoryPoolBenchRandom : public Benchmark {
public:
bool isSuitableFor(Backend backend) override {
return backend == kNonRendering_Backend;
}
protected:
const char* onGetName() override {
return "grmemorypool_random";
}
void onDraw(int loops, SkCanvas*) override {
SkRandom r;
enum {
kMaxObjects = 4 * (1 << 10),
};
std::unique_ptr<B> objects[kMaxObjects];
for (int i = 0; i < loops; i++) {
uint32_t idx = r.nextRangeU(0, kMaxObjects-1);
if (nullptr == objects[idx].get()) {
objects[idx].reset(new B);
} else {
objects[idx].reset();
}
}
}
private:
typedef Benchmark INHERITED;
};
struct C {
int gStuff[10];
#if OVERRIDE_NEW
void* operator new (size_t size) { return gBenchPool.allocate(size); }
void operator delete (void* mem) { if (mem) { return gBenchPool.release(mem); } }
#endif
static GrMemoryPool gBenchPool;
};
GrMemoryPool C::gBenchPool(10 * (1 << 10), 10 * (1 << 10));
/**
* This benchmark creates objects and deletes them in queue order
*/
class GrMemoryPoolBenchQueue : public Benchmark {
enum {
M = 4 * (1 << 10),
};
public:
bool isSuitableFor(Backend backend) override {
return backend == kNonRendering_Backend;
}
protected:
const char* onGetName() override {
return "grmemorypool_queue";
}
void onDraw(int loops, SkCanvas*) override {
SkRandom r;
C* objects[M];
for (int i = 0; i < loops; i++) {
uint32_t count = r.nextRangeU(0, M-1);
for (uint32_t i = 0; i < count; i++) {
objects[i] = new C;
}
for (uint32_t i = 0; i < count; i++) {
delete objects[i];
}
}
}
private:
typedef Benchmark INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_BENCH( return new GrMemoryPoolBenchStack(); )
DEF_BENCH( return new GrMemoryPoolBenchRandom(); )
DEF_BENCH( return new GrMemoryPoolBenchQueue(); )
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