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
|
//===-- Timer.cpp -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/Timer.h"
#include "lldb/Host/Host.h"
#include "lldb/Utility/Stream.h"
#include "lldb/lldb-types.h" // for thread_key_t
#include <algorithm>
#include <map>
#include <mutex>
#include <utility> // for pair
#include <vector>
#include <assert.h> // for assert
#include <stdarg.h> // for va_end, va_list, va_start
#include <stdio.h>
using namespace lldb_private;
#define TIMER_INDENT_AMOUNT 2
namespace {
typedef std::vector<Timer *> TimerStack;
static std::atomic<Timer::Category *> g_categories;
} // end of anonymous namespace
std::atomic<bool> Timer::g_quiet(true);
std::atomic<unsigned> Timer::g_display_depth(0);
static std::mutex &GetFileMutex() {
static std::mutex *g_file_mutex_ptr = new std::mutex();
return *g_file_mutex_ptr;
}
static void ThreadSpecificCleanup(void *p) {
delete static_cast<TimerStack *>(p);
}
static TimerStack *GetTimerStackForCurrentThread() {
static lldb::thread_key_t g_key =
Host::ThreadLocalStorageCreate(ThreadSpecificCleanup);
void *timer_stack = Host::ThreadLocalStorageGet(g_key);
if (timer_stack == NULL) {
Host::ThreadLocalStorageSet(g_key, new TimerStack);
timer_stack = Host::ThreadLocalStorageGet(g_key);
}
return (TimerStack *)timer_stack;
}
Timer::Category::Category(const char *cat) : m_name(cat) {
m_nanos.store(0, std::memory_order_release);
Category *expected = g_categories;
do {
m_next = expected;
} while (!g_categories.compare_exchange_weak(expected, this));
}
void Timer::SetQuiet(bool value) { g_quiet = value; }
Timer::Timer(Timer::Category &category, const char *format, ...)
: m_category(category), m_total_start(std::chrono::steady_clock::now()) {
TimerStack *stack = GetTimerStackForCurrentThread();
if (!stack)
return;
stack->push_back(this);
if (g_quiet && stack->size() <= g_display_depth) {
std::lock_guard<std::mutex> lock(GetFileMutex());
// Indent
::fprintf(stdout, "%*s", int(stack->size() - 1) * TIMER_INDENT_AMOUNT, "");
// Print formatted string
va_list args;
va_start(args, format);
::vfprintf(stdout, format, args);
va_end(args);
// Newline
::fprintf(stdout, "\n");
}
}
Timer::~Timer() {
using namespace std::chrono;
TimerStack *stack = GetTimerStackForCurrentThread();
if (!stack)
return;
auto stop_time = steady_clock::now();
auto total_dur = stop_time - m_total_start;
auto timer_dur = total_dur - m_child_duration;
if (g_quiet && stack->size() <= g_display_depth) {
std::lock_guard<std::mutex> lock(GetFileMutex());
::fprintf(stdout, "%*s%.9f sec (%.9f sec)\n",
int(stack->size() - 1) * TIMER_INDENT_AMOUNT, "",
duration<double>(total_dur).count(),
duration<double>(timer_dur).count());
}
assert(stack->back() == this);
stack->pop_back();
if (!stack->empty())
stack->back()->ChildDuration(total_dur);
// Keep total results for each category so we can dump results.
m_category.m_nanos += std::chrono::nanoseconds(timer_dur).count();
}
void Timer::SetDisplayDepth(uint32_t depth) { g_display_depth = depth; }
/* binary function predicate:
* - returns whether a person is less than another person
*/
typedef std::pair<const char *, uint64_t> TimerEntry;
static bool CategoryMapIteratorSortCriterion(const TimerEntry &lhs,
const TimerEntry &rhs) {
return lhs.second > rhs.second;
}
void Timer::ResetCategoryTimes() {
for (Category *i = g_categories; i; i = i->m_next)
i->m_nanos.store(0, std::memory_order_release);
}
void Timer::DumpCategoryTimes(Stream *s) {
std::vector<TimerEntry> sorted;
for (Category *i = g_categories; i; i = i->m_next) {
uint64_t nanos = i->m_nanos.load(std::memory_order_acquire);
if (nanos)
sorted.push_back(std::make_pair(i->m_name, nanos));
}
if (sorted.empty())
return; // Later code will break without any elements.
// Sort by time
std::sort(sorted.begin(), sorted.end(), CategoryMapIteratorSortCriterion);
for (const auto &timer : sorted)
s->Printf("%.9f sec for %s\n", timer.second / 1000000000., timer.first);
}
|
