/src/botan/src/lib/utils/timer.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * (C) 2018 Jack Lloyd |
3 | | * |
4 | | * Botan is released under the Simplified BSD License (see license.txt) |
5 | | */ |
6 | | |
7 | | #include <botan/internal/timer.h> |
8 | | #include <botan/internal/os_utils.h> |
9 | | #include <algorithm> |
10 | | #include <sstream> |
11 | | #include <iomanip> |
12 | | |
13 | | namespace Botan { |
14 | | |
15 | | void Timer::start() |
16 | 0 | { |
17 | 0 | stop(); |
18 | 0 | m_timer_start = OS::get_system_timestamp_ns(); |
19 | 0 | m_cpu_cycles_start = OS::get_cpu_cycle_counter(); |
20 | 0 | } |
21 | | |
22 | | void Timer::stop() |
23 | 0 | { |
24 | 0 | if(m_timer_start) |
25 | 0 | { |
26 | 0 | if(m_cpu_cycles_start != 0) |
27 | 0 | { |
28 | 0 | const uint64_t cycles_taken = OS::get_cpu_cycle_counter() - m_cpu_cycles_start; |
29 | 0 | if(cycles_taken > 0) |
30 | 0 | { |
31 | 0 | m_cpu_cycles_used += static_cast<size_t>(cycles_taken * m_clock_cycle_ratio); |
32 | 0 | } |
33 | 0 | } |
34 | 0 |
|
35 | 0 | const uint64_t now = OS::get_system_timestamp_ns(); |
36 | 0 |
|
37 | 0 | if(now > m_timer_start) |
38 | 0 | { |
39 | 0 | const uint64_t dur = now - m_timer_start; |
40 | 0 |
|
41 | 0 | m_time_used += dur; |
42 | 0 |
|
43 | 0 | if(m_event_count == 0) |
44 | 0 | { |
45 | 0 | m_min_time = m_max_time = dur; |
46 | 0 | } |
47 | 0 | else |
48 | 0 | { |
49 | 0 | m_max_time = std::max(m_max_time, dur); |
50 | 0 | m_min_time = std::min(m_min_time, dur); |
51 | 0 | } |
52 | 0 | } |
53 | 0 |
|
54 | 0 | m_timer_start = 0; |
55 | 0 | ++m_event_count; |
56 | 0 | } |
57 | 0 | } |
58 | | |
59 | | bool Timer::operator<(const Timer& other) const |
60 | 0 | { |
61 | 0 | if(this->doing() != other.doing()) |
62 | 0 | return (this->doing() < other.doing()); |
63 | 0 | |
64 | 0 | return (this->get_name() < other.get_name()); |
65 | 0 | } |
66 | | |
67 | | std::string Timer::to_string() const |
68 | 0 | { |
69 | 0 | if(m_custom_msg.size() > 0) |
70 | 0 | { |
71 | 0 | return m_custom_msg; |
72 | 0 | } |
73 | 0 | else if(this->buf_size() == 0) |
74 | 0 | { |
75 | 0 | return result_string_ops(); |
76 | 0 | } |
77 | 0 | else |
78 | 0 | { |
79 | 0 | return result_string_bps(); |
80 | 0 | } |
81 | 0 | } |
82 | | |
83 | | std::string Timer::result_string_bps() const |
84 | 0 | { |
85 | 0 | const size_t MiB = 1024 * 1024; |
86 | 0 |
|
87 | 0 | const double MiB_total = static_cast<double>(events()) / MiB; |
88 | 0 | const double MiB_per_sec = MiB_total / seconds(); |
89 | 0 |
|
90 | 0 | std::ostringstream oss; |
91 | 0 | oss << get_name(); |
92 | 0 |
|
93 | 0 | if(!doing().empty()) |
94 | 0 | { |
95 | 0 | oss << " " << doing(); |
96 | 0 | } |
97 | 0 |
|
98 | 0 | if(buf_size() > 0) |
99 | 0 | { |
100 | 0 | oss << " buffer size " << buf_size() << " bytes:"; |
101 | 0 | } |
102 | 0 |
|
103 | 0 | if(events() == 0) |
104 | 0 | oss << " " << "N/A"; |
105 | 0 | else |
106 | 0 | oss << " " << std::fixed << std::setprecision(3) << MiB_per_sec << " MiB/sec"; |
107 | 0 |
|
108 | 0 | if(cycles_consumed() != 0) |
109 | 0 | { |
110 | 0 | const double cycles_per_byte = static_cast<double>(cycles_consumed()) / events(); |
111 | 0 | oss << " " << std::fixed << std::setprecision(2) << cycles_per_byte << " cycles/byte"; |
112 | 0 | } |
113 | 0 |
|
114 | 0 | oss << " (" << MiB_total << " MiB in " << milliseconds() << " ms)\n"; |
115 | 0 |
|
116 | 0 | return oss.str(); |
117 | 0 | } |
118 | | |
119 | | std::string Timer::result_string_ops() const |
120 | 0 | { |
121 | 0 | std::ostringstream oss; |
122 | 0 |
|
123 | 0 | oss << get_name() << " "; |
124 | 0 |
|
125 | 0 | if(events() == 0) |
126 | 0 | { |
127 | 0 | oss << "no events\n"; |
128 | 0 | } |
129 | 0 | else |
130 | 0 | { |
131 | 0 | oss << static_cast<uint64_t>(events_per_second()) |
132 | 0 | << ' ' << doing() << "/sec; " |
133 | 0 | << std::setprecision(2) << std::fixed |
134 | 0 | << ms_per_event() << " ms/op"; |
135 | 0 |
|
136 | 0 | if(cycles_consumed() != 0) |
137 | 0 | { |
138 | 0 | const double cycles_per_op = static_cast<double>(cycles_consumed()) / events(); |
139 | 0 | const int precision = (cycles_per_op < 10000) ? 2 : 0; |
140 | 0 | oss << " " << std::fixed << std::setprecision(precision) << cycles_per_op << " cycles/op"; |
141 | 0 | } |
142 | 0 |
|
143 | 0 | oss << " (" << events() << " " << (events() == 1 ? "op" : "ops") |
144 | 0 | << " in " << milliseconds() << " ms)\n"; |
145 | 0 | } |
146 | 0 |
|
147 | 0 | return oss.str(); |
148 | 0 | } |
149 | | |
150 | | } |