/[dtapublic]/to_be_filed/webprojs/php_libraries/php_library/e3ft_com/cpuusagestatclock.inc
ViewVC logotype

Contents of /to_be_filed/webprojs/php_libraries/php_library/e3ft_com/cpuusagestatclock.inc

Parent Directory Parent Directory | Revision Log Revision Log


Revision 35 - (show annotations) (download)
Sat Oct 8 23:35:33 2016 UTC (6 years, 3 months ago) by dashley
File size: 6737 byte(s)
Initial commit.
1 <?php
2 //
3 //********************************************************************************
4 //Copyright (C) 2003 David T. Ashley
5 //********************************************************************************
6 //This program or source file is free software; you can redistribute it and/or
7 //modify it under the terms of the GNU General Public License as published by
8 //the Free Software Foundation; either version 2 of the License, or (at your
9 //option) any later version.
10 //
11 //This program or source file is distributed in the hope that it will
12 //be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
13 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 //GNU General Public License for more details.
15 //
16 //You may have received a copy of the GNU General Public License
17 //along with this program; if not, write to the Free Software
18 //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 //********************************************************************************
20 //
21 //Dave Ashley, 01/03
22 //
23 //This defines a simple PHP class to make it easier to implement a page statistic
24 //that indicates how much CPU time was used by a page or a portion of a page.
25 //The statistics are not always straightforward because each load of a page
26 //may just add more used time to the same process. Stats must be obtained
27 //by subtraction.
28 //
29 //The basic strategy is that a clock is constructed then may be alternatively
30 //started, stopped, and polled. It is necessary to stop a clock before
31 //polling it.
32 //
33 class Cpuusagestatclock
34 {
35 //The fields below are updated each time the clock is stopped.
36 var $utime_s;
37 //The seconds portion of the amount of user time consumed.
38 var $utime_m;
39 //The microseconds portion of the amount of user time consumed.
40 var $stime_s;
41 //The seconds portion of the amount of system time consumed.
42 var $stime_m;
43 //The microseconds portion of the amount of system time consumed.
44
45 //The following fields are analogous to the ones above, except they
46 //hold time snapshot values from when the clock was most recently
47 //started.
48 var $ss_utime_s;
49 var $ss_utime_m;
50 var $ss_stime_s;
51 var $ss_stime_m;
52
53 //This is the constructor function.
54 function Cpuusagestatclock()
55 {
56 //All that is required at construction is to set the cumulative
57 //values to zero.
58 $this->utime_s = 0;
59 $this->utime_m = 0;
60 $this->stime_s = 0;
61 $this->stime_m = 0;
62 }
63
64 //This starts the clock. This just records a static time usage mark.
65 function start()
66 {
67 //Get the snapshot from the system.
68 $snapshot = getrusage();
69
70 //Record the values of interest.
71 $this->ss_utime_s = $snapshot["ru_utime.tv_sec"];
72 $this->ss_utime_m = $snapshot["ru_utime.tv_usec"];
73 $this->ss_stime_s = $snapshot["ru_stime.tv_sec"];
74 $this->ss_stime_m = $snapshot["ru_stime.tv_usec"];
75 }
76
77
78 //This stops the clock. This calculates the used time and adds it in to
79 //the totals.
80 function stop()
81 {
82 //Get the snapshot from the system.
83 $snapshot = getrusage();
84
85 //Calculate and add in the elapsed user time usage since the snapshot.
86 $this->utime_s += ($snapshot["ru_utime.tv_sec"] - $this->ss_utime_s);
87 $this->utime_m += ($snapshot["ru_utime.tv_usec"] - $this->ss_utime_m);
88 while ($this->utime_m < 0)
89 {
90 $this->utime_m += 1000000;
91 $this->utime_s--;
92 }
93
94 //Calculate and add in the elapsed system time usage since the snapshot.
95 $this->stime_s += ($snapshot["ru_stime.tv_sec"] - $this->ss_stime_s);
96 $this->stime_m += ($snapshot["ru_stime.tv_usec"] - $this->ss_stime_m);
97 while ($this->stime_m < 0)
98 {
99 $this->stime_m += 1000000;
100 $this->stime_s--;
101 }
102 }
103
104 //This returns the user time microseconds elapsed of a stopped clock, with no padding.
105 function utime_raw_us()
106 {
107 return($this->utime_m);
108 }
109
110 //This returns the user time microseconds elapsed of a stopped clock, padded
111 //with leading zeros to be six digits long.
112 function utime_formatted_us()
113 {
114 $rv = $this->utime_raw_us();
115
116 while(strlen($rv) < 6)
117 $rv = "0" . $rv;
118
119 return($rv);
120 }
121
122 //This returns the system time microseconds elapsed of a stopped clock, with no padding.
123 function stime_raw_us()
124 {
125 return($this->stime_m);
126 }
127
128 //This returns the system time microseconds elapsed of a stopped clock, padded
129 //with leading zeros to be six digits long.
130 function stime_formatted_us()
131 {
132 $rv = $this->stime_raw_us();
133
134 while(strlen($rv) < 6)
135 $rv = "0" . $rv;
136
137 return($rv);
138 }
139
140 //This returns the total time microseconds elapsed of a stopped clock, with no padding.
141 function ttime_raw_us()
142 {
143 $rv = $this->stime_m + $this->utime_m;
144
145 if ($rv >= 1000000)
146 $rv -= 1000000;
147
148 return($rv);
149 }
150
151 //This returns the total time microseconds elapsed of a stopped clock, padded
152 //with leading zeros to be six digits long.
153 function ttime_formatted_us()
154 {
155 $rv = $this->ttime_raw_us();
156
157 while(strlen($rv) < 6)
158 $rv = "0" . $rv;
159
160 return($rv);
161 }
162
163 //This returns the user time seconds elapsed of a stopped clock.
164 function utime_s()
165 {
166 return($this->utime_s);
167 }
168
169 //This returns the system time seconds elapsed of a stopped clock.
170 function stime_s()
171 {
172 return($this->stime_s);
173 }
174
175 //This returns the total time seconds elapsed of a stopped clock.
176 function ttime_s()
177 {
178 $rv = $this->stime_s + $this->utime_s;
179
180 $us_total = $this->stime_m + $this->utime_m;
181
182 if ($us_total >= 1000000)
183 $rv++;
184
185 return($rv);
186 }
187
188 //This returns the standard string for a footer of a web page. No HTML formatting tags
189 //are included.
190 function std_web_page_cpu_time_usage_footer()
191 {
192 return
193 (
194 "This page required approximately "
195 .
196 $this->ttime_s()
197 .
198 "."
199 .
200 Substr($this->ttime_formatted_us(), 0, 2)
201 .
202 "s ("
203 .
204 $this->stime_s()
205 .
206 "."
207 .
208 Substr($this->stime_formatted_us(), 0, 2)
209 .
210 "s system, "
211 .
212 $this->utime_s()
213 .
214 "."
215 .
216 Substr($this->utime_formatted_us(), 0, 2)
217 .
218 "s user) of CPU time on the server to generate."
219 );
220 }
221 }
222 ?>

dashley@gmail.com
ViewVC Help
Powered by ViewVC 1.1.25