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
|
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/basic-block-profiler.h"
#include <algorithm>
#include <numeric>
#include <sstream>
#include "src/base/lazy-instance.h"
namespace v8 {
namespace internal {
namespace {
base::LazyInstance<BasicBlockProfiler>::type kBasicBlockProfiler =
LAZY_INSTANCE_INITIALIZER;
}
BasicBlockProfiler* BasicBlockProfiler::Get() {
return kBasicBlockProfiler.Pointer();
}
BasicBlockProfiler::Data::Data(size_t n_blocks)
: n_blocks_(n_blocks),
block_rpo_numbers_(n_blocks_),
counts_(n_blocks_, 0) {}
static void InsertIntoString(std::ostringstream* os, std::string* string) {
string->insert(0, os->str());
}
static void InsertIntoString(const char* data, std::string* string) {
string->insert(0, data);
}
void BasicBlockProfiler::Data::SetCode(std::ostringstream* os) {
InsertIntoString(os, &code_);
}
void BasicBlockProfiler::Data::SetFunctionName(std::unique_ptr<char[]> name) {
InsertIntoString(name.get(), &function_name_);
}
void BasicBlockProfiler::Data::SetSchedule(std::ostringstream* os) {
InsertIntoString(os, &schedule_);
}
void BasicBlockProfiler::Data::SetBlockRpoNumber(size_t offset,
int32_t block_rpo) {
DCHECK(offset < n_blocks_);
block_rpo_numbers_[offset] = block_rpo;
}
intptr_t BasicBlockProfiler::Data::GetCounterAddress(size_t offset) {
DCHECK(offset < n_blocks_);
return reinterpret_cast<intptr_t>(&(counts_[offset]));
}
void BasicBlockProfiler::Data::ResetCounts() {
for (size_t i = 0; i < n_blocks_; ++i) {
counts_[i] = 0;
}
}
BasicBlockProfiler::Data* BasicBlockProfiler::NewData(size_t n_blocks) {
base::LockGuard<base::Mutex> lock(&data_list_mutex_);
Data* data = new Data(n_blocks);
data_list_.push_back(data);
return data;
}
BasicBlockProfiler::~BasicBlockProfiler() {
for (DataList::iterator i = data_list_.begin(); i != data_list_.end(); ++i) {
delete (*i);
}
}
void BasicBlockProfiler::ResetCounts() {
for (DataList::iterator i = data_list_.begin(); i != data_list_.end(); ++i) {
(*i)->ResetCounts();
}
}
std::ostream& operator<<(std::ostream& os, const BasicBlockProfiler& p) {
os << "---- Start Profiling Data ----" << std::endl;
typedef BasicBlockProfiler::DataList::const_iterator iterator;
for (iterator i = p.data_list_.begin(); i != p.data_list_.end(); ++i) {
os << **i;
}
os << "---- End Profiling Data ----" << std::endl;
return os;
}
std::ostream& operator<<(std::ostream& os, const BasicBlockProfiler::Data& d) {
int block_count_sum = std::accumulate(d.counts_.begin(), d.counts_.end(), 0);
if (block_count_sum == 0) return os;
const char* name = "unknown function";
if (!d.function_name_.empty()) {
name = d.function_name_.c_str();
}
if (!d.schedule_.empty()) {
os << "schedule for " << name << " (B0 entered " << d.counts_[0]
<< " times)" << std::endl;
os << d.schedule_.c_str() << std::endl;
}
os << "block counts for " << name << ":" << std::endl;
std::vector<std::pair<int32_t, uint32_t>> pairs;
pairs.reserve(d.n_blocks_);
for (size_t i = 0; i < d.n_blocks_; ++i) {
pairs.push_back(std::make_pair(d.block_rpo_numbers_[i], d.counts_[i]));
}
std::sort(pairs.begin(), pairs.end(),
[=](std::pair<int32_t, uint32_t> left,
std::pair<int32_t, uint32_t> right) {
if (right.second == left.second)
return left.first < right.first;
return right.second < left.second;
});
for (auto it : pairs) {
if (it.second == 0) break;
os << "block B" << it.first << " : " << it.second << std::endl;
}
os << std::endl;
if (!d.code_.empty()) {
os << d.code_.c_str() << std::endl;
}
return os;
}
} // namespace internal
} // namespace v8
|
