1 | // -*- c++ -*- |
---|
2 | #ifndef HUGO_TIME_MEASURE_H |
---|
3 | #define HUGO_TIME_MEASURE_H |
---|
4 | |
---|
5 | ///ingroup misc |
---|
6 | ///\file |
---|
7 | ///\brief Tools for measuring cpu usage |
---|
8 | |
---|
9 | #include <sys/time.h> |
---|
10 | #include <sys/times.h> |
---|
11 | #include <fstream> |
---|
12 | #include <iostream> |
---|
13 | #include <unistd.h> |
---|
14 | |
---|
15 | namespace hugo { |
---|
16 | |
---|
17 | /// \addtogroup misc |
---|
18 | /// @{ |
---|
19 | |
---|
20 | /// A class to store (cpu)time instances. |
---|
21 | |
---|
22 | /// This class stores five time values. |
---|
23 | /// - a real time |
---|
24 | /// - a user cpu time |
---|
25 | /// - a system cpu time |
---|
26 | /// - a user cpu time of children |
---|
27 | /// - a system cpu time of children |
---|
28 | /// |
---|
29 | /// TimeStamp's can be added to or substracted from each other and |
---|
30 | /// they can be pushed to a stream. |
---|
31 | |
---|
32 | class TimeStamp |
---|
33 | { |
---|
34 | tms ts; |
---|
35 | double real_time; |
---|
36 | |
---|
37 | public: |
---|
38 | |
---|
39 | tms &getTms() {return ts;} |
---|
40 | const tms &getTms() const {return ts;} |
---|
41 | ///Read the current time values of the process |
---|
42 | void stamp() |
---|
43 | { |
---|
44 | timeval tv; |
---|
45 | times(&ts); |
---|
46 | gettimeofday(&tv, 0);real_time=tv.tv_sec+double(tv.tv_usec)/1e6; |
---|
47 | } |
---|
48 | |
---|
49 | /// Constructor initializing with zero |
---|
50 | TimeStamp() |
---|
51 | { ts.tms_utime=ts.tms_stime=ts.tms_cutime=ts.tms_cstime=0; real_time=0;} |
---|
52 | ///Constructor initializing with the current time values of the process |
---|
53 | TimeStamp(void *) { stamp();} |
---|
54 | |
---|
55 | /// |
---|
56 | TimeStamp &operator+=(const TimeStamp &b) |
---|
57 | { |
---|
58 | ts.tms_utime+=b.ts.tms_utime; |
---|
59 | ts.tms_stime+=b.ts.tms_stime; |
---|
60 | ts.tms_cutime+=b.ts.tms_cutime; |
---|
61 | ts.tms_cstime+=b.ts.tms_cstime; |
---|
62 | real_time+=b.real_time; |
---|
63 | return *this; |
---|
64 | } |
---|
65 | /// |
---|
66 | TimeStamp operator+(const TimeStamp &b) const |
---|
67 | { |
---|
68 | TimeStamp t(*this); |
---|
69 | return t+=b; |
---|
70 | } |
---|
71 | /// |
---|
72 | TimeStamp &operator-=(const TimeStamp &b) |
---|
73 | { |
---|
74 | ts.tms_utime-=b.ts.tms_utime; |
---|
75 | ts.tms_stime-=b.ts.tms_stime; |
---|
76 | ts.tms_cutime-=b.ts.tms_cutime; |
---|
77 | ts.tms_cstime-=b.ts.tms_cstime; |
---|
78 | real_time-=b.real_time; |
---|
79 | return *this; |
---|
80 | } |
---|
81 | /// |
---|
82 | TimeStamp operator-(const TimeStamp &b) const |
---|
83 | { |
---|
84 | TimeStamp t(*this); |
---|
85 | return t-=b; |
---|
86 | } |
---|
87 | |
---|
88 | ///The time ellapsed since the last call of stamp() |
---|
89 | TimeStamp ellapsed() const |
---|
90 | { |
---|
91 | TimeStamp t(NULL); |
---|
92 | return t-*this; |
---|
93 | } |
---|
94 | |
---|
95 | friend std::ostream& operator<<(std::ostream& os,const TimeStamp &t); |
---|
96 | |
---|
97 | ///Gives back the user time of the process |
---|
98 | double getUserTime() const |
---|
99 | { |
---|
100 | return double(ts.tms_utime)/sysconf(_SC_CLK_TCK); |
---|
101 | } |
---|
102 | ///Gives back the system time of the process |
---|
103 | double getSystemTime() const |
---|
104 | { |
---|
105 | return double(ts.tms_stime)/sysconf(_SC_CLK_TCK); |
---|
106 | } |
---|
107 | ///Gives back the user time of the process' children |
---|
108 | double getCUserTime() const |
---|
109 | { |
---|
110 | return double(ts.tms_cutime)/sysconf(_SC_CLK_TCK); |
---|
111 | } |
---|
112 | ///Gives back the user time of the process' children |
---|
113 | double getCSystemTime() const |
---|
114 | { |
---|
115 | return double(ts.tms_cstime)/sysconf(_SC_CLK_TCK); |
---|
116 | } |
---|
117 | ///Gives back the real time of the process |
---|
118 | double getRealTime() const {return real_time;} |
---|
119 | }; |
---|
120 | |
---|
121 | ///Class measuring the cpu time and real time usage of the process |
---|
122 | class Timer |
---|
123 | { |
---|
124 | TimeStamp start_time; |
---|
125 | |
---|
126 | void _reset() {start_time.stamp();} |
---|
127 | |
---|
128 | public: |
---|
129 | ///Constructor. It starts with zero time counters |
---|
130 | Timer() {_reset();} |
---|
131 | |
---|
132 | ///Computes the ellapsed time |
---|
133 | |
---|
134 | ///This conversion computes the ellapsed time |
---|
135 | ///since the construction of \c t or since |
---|
136 | ///the last \c t.reset(). |
---|
137 | operator TimeStamp () |
---|
138 | { |
---|
139 | TimeStamp t; |
---|
140 | t.stamp(); |
---|
141 | return t-start_time; |
---|
142 | } |
---|
143 | |
---|
144 | ///Resets the time counters |
---|
145 | TimeStamp reset() |
---|
146 | { |
---|
147 | TimeStamp t(start_time); |
---|
148 | _reset(); |
---|
149 | return start_time-t; |
---|
150 | } |
---|
151 | }; |
---|
152 | |
---|
153 | ///Prints the time counters |
---|
154 | |
---|
155 | ///Prints the time counters in the folloing form: |
---|
156 | /// |
---|
157 | /// u: XX.XXs s: XX.XXs cu: XX.XXs cs: XX.XXs real: XX.XXs |
---|
158 | /// |
---|
159 | /// where the values are the |
---|
160 | /// - a user cpu time, |
---|
161 | /// - a system cpu time, |
---|
162 | /// - a user cpu time of children, |
---|
163 | /// - a system cpu time of children and |
---|
164 | /// - a real time, |
---|
165 | /// |
---|
166 | ///respectively |
---|
167 | inline std::ostream& operator<<(std::ostream& os,const TimeStamp &t) |
---|
168 | { |
---|
169 | long cls = sysconf(_SC_CLK_TCK); |
---|
170 | os << "u: " << double(t.getTms().tms_utime)/cls << |
---|
171 | "s, s: " << double(t.getTms().tms_stime)/cls << |
---|
172 | "s, cu: " << double(t.getTms().tms_cutime)/cls << |
---|
173 | "s, cs: " << double(t.getTms().tms_cstime)/cls << |
---|
174 | "s, real: " << t.getRealTime() << "s"; |
---|
175 | return os; |
---|
176 | } |
---|
177 | |
---|
178 | /// @} |
---|
179 | |
---|
180 | } //namespace hugo |
---|
181 | |
---|
182 | #endif //HUGO_TIME_MEASURE_H |
---|