2 * Copyright (c) 2010-2012 Niels Provos and Nick Mathewson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "event2/event-config.h"
35 #include <sys/types.h>
37 #ifdef _EVENT_HAVE_SYS_TIME_H
41 #ifdef _EVENT_HAVE_SYS_SOCKET_H
42 #include <sys/socket.h>
50 #include "event2/event.h"
51 #include "event2/util.h"
54 struct cpu_usage_timer
{
57 FILETIME usertimeBegin
;
58 FILETIME kerneltimeBegin
;
62 struct timeval timeBegin
;
65 start_cpu_usage_timer(struct cpu_usage_timer
*timer
)
69 FILETIME createtime
, exittime
;
70 timer
->thread
= GetCurrentThread();
71 r
= GetThreadTimes(timer
->thread
, &createtime
, &exittime
,
72 &timer
->usertimeBegin
, &timer
->kerneltimeBegin
);
73 if (r
==0) printf("GetThreadTimes failed.");
75 timer
->ticksBegin
= clock();
78 evutil_gettimeofday(&timer
->timeBegin
, NULL
);
82 filetime_to_100nsec(const FILETIME
*ft
)
84 /* Number of 100-nanosecond units */
85 ev_int64_t n
= ft
->dwHighDateTime
;
87 n
+= ft
->dwLowDateTime
;
91 filetime_diff(const FILETIME
*ftStart
, const FILETIME
*ftEnd
)
93 ev_int64_t s
, e
, diff
;
95 s
= filetime_to_100nsec(ftStart
);
96 e
= filetime_to_100nsec(ftEnd
);
104 get_cpu_usage(struct cpu_usage_timer
*timer
, double *secElapsedOut
,
105 double *secUsedOut
, double *usageOut
)
108 double usertime_seconds
, kerneltime_seconds
;
109 FILETIME createtime
, exittime
, usertimeEnd
, kerneltimeEnd
;
114 struct timeval timeEnd
, timeDiff
;
115 double secondsPassed
, secondsUsed
;
118 r
= GetThreadTimes(timer
->thread
, &createtime
, &exittime
,
119 &usertimeEnd
, &kerneltimeEnd
);
120 if (r
==0) printf("GetThreadTimes failed.");
121 usertime_seconds
= filetime_diff(&timer
->usertimeBegin
, &usertimeEnd
);
122 kerneltime_seconds
= filetime_diff(&timer
->kerneltimeBegin
, &kerneltimeEnd
);
123 secondsUsed
= kerneltime_seconds
+ usertime_seconds
;
126 secondsUsed
= (ticksEnd
- timer
->ticksBegin
) / (double)CLOCKS_PER_SEC
;
128 evutil_gettimeofday(&timeEnd
, NULL
);
129 evutil_timersub(&timeEnd
, &timer
->timeBegin
, &timeDiff
);
130 secondsPassed
= timeDiff
.tv_sec
+ (timeDiff
.tv_usec
/ 1.0e6
);
132 *secElapsedOut
= secondsPassed
;
133 *secUsedOut
= secondsUsed
;
134 *usageOut
= secondsUsed
/ secondsPassed
;
138 write_cb(evutil_socket_t fd
, short event
, void *arg
)
140 printf("write callback. should only see this once\n");
142 /* got what we want remove the event */
143 event_del(*(struct event
**)arg
);
145 /* opps changed my mind add it back again */
146 event_add(*(struct event
**)arg
,NULL
);
148 /* not a good day for decisiveness, I really didn't want it after all */
149 event_del(*(struct event
**)arg
);
154 timeout_cb(evutil_socket_t fd
, short event
, void *arg
)
156 printf("timeout fired, time to end test\n");
157 event_del(*(struct event
**)arg
);
162 main(int argc
, char **argv
)
165 struct event
* timeout
;
166 struct event_base
* base
;
168 evutil_socket_t pair
[2];
170 struct cpu_usage_timer timer
;
172 double usage
, secPassed
, secUsed
;
175 WORD wVersionRequested
;
179 wVersionRequested
= MAKEWORD(2, 2);
181 err
= WSAStartup(wVersionRequested
, &wsaData
);
183 if (evutil_socketpair(AF_UNIX
, SOCK_STREAM
, 0, pair
) == -1)
186 /* Initalize the event library */
187 base
= event_base_new();
189 /* Initalize a timeout to terminate the test */
190 timeout
= evtimer_new(base
,timeout_cb
,&timeout
);
191 /* and watch for writability on one end of the pipe */
192 ev
= event_new(base
,pair
[1],EV_WRITE
| EV_PERSIST
, write_cb
, &ev
);
197 evtimer_add(timeout
, &tv
);
201 start_cpu_usage_timer(&timer
);
203 event_base_dispatch(base
);
207 event_base_free(base
);
209 get_cpu_usage(&timer
, &secPassed
, &secUsed
, &usage
);
211 /* attempt to calculate our cpu usage over the test should be
214 printf("usec used=%d, usec passed=%d, cpu usage=%.2f%%\n",
216 (int)(secPassed
*1e6
),
219 if (usage
> 50.0) /* way too high */