5 #include "event2/event-config.h"
13 #include <sys/types.h>
15 #ifdef _EVENT_HAVE_SYS_TIME_H
19 #ifdef _EVENT_HAVE_SYS_SOCKET_H
20 #include <sys/socket.h>
28 #include "event2/event.h"
29 #include "event2/util.h"
32 struct cpu_usage_timer {
35 FILETIME usertimeBegin;
36 FILETIME kerneltimeBegin;
40 struct timeval timeBegin;
43 start_cpu_usage_timer(struct cpu_usage_timer *timer)
47 FILETIME createtime, exittime;
48 timer->thread = GetCurrentThread();
49 r = GetThreadTimes(timer->thread, &createtime, &exittime,
50 &timer->usertimeBegin, &timer->kerneltimeBegin);
51 if (r==0) printf("GetThreadTimes failed.");
53 timer->ticksBegin = clock();
56 evutil_gettimeofday(&timer->timeBegin, NULL);
60 filetime_to_100nsec(const FILETIME *ft)
62 /* Number of 100-nanosecond units */
63 ev_int64_t n = ft->dwHighDateTime;
65 n += ft->dwLowDateTime;
69 filetime_diff(const FILETIME *ftStart, const FILETIME *ftEnd)
71 ev_int64_t s, e, diff;
73 s = filetime_to_100nsec(ftStart);
74 e = filetime_to_100nsec(ftEnd);
82 get_cpu_usage(struct cpu_usage_timer *timer, double *secElapsedOut,
83 double *secUsedOut, double *usageOut)
86 double usertime_seconds, kerneltime_seconds;
87 FILETIME createtime, exittime, usertimeEnd, kerneltimeEnd;
92 struct timeval timeEnd, timeDiff;
93 double secondsPassed, secondsUsed;
96 r = GetThreadTimes(timer->thread, &createtime, &exittime,
97 &usertimeEnd, &kerneltimeEnd);
98 if (r==0) printf("GetThreadTimes failed.");
99 usertime_seconds = filetime_diff(&timer->usertimeBegin, &usertimeEnd);
100 kerneltime_seconds = filetime_diff(&timer->kerneltimeBegin, &kerneltimeEnd);
101 secondsUsed = kerneltime_seconds + usertime_seconds;
104 secondsUsed = (ticksEnd - timer->ticksBegin) / (double)CLOCKS_PER_SEC;
106 evutil_gettimeofday(&timeEnd, NULL);
107 evutil_timersub(&timeEnd, &timer->timeBegin, &timeDiff);
108 secondsPassed = timeDiff.tv_sec + (timeDiff.tv_usec / 1.0e6);
110 *secElapsedOut = secondsPassed;
111 *secUsedOut = secondsUsed;
112 *usageOut = secondsUsed / secondsPassed;
116 write_cb(evutil_socket_t fd, short event, void *arg)
118 printf("write callback. should only see this once\n");
120 /* got what we want remove the event */
121 event_del(*(struct event**)arg);
123 /* opps changed my mind add it back again */
124 event_add(*(struct event**)arg,NULL);
126 /* not a good day for decisiveness, I really didn't want it after all */
127 event_del(*(struct event**)arg);
132 timeout_cb(evutil_socket_t fd, short event, void *arg)
134 printf("timeout fired, time to end test\n");
135 event_del(*(struct event**)arg);
140 main(int argc, char **argv)
143 struct event* timeout;
144 struct event_base* base;
146 evutil_socket_t pair[2];
148 struct cpu_usage_timer timer;
150 double usage, secPassed, secUsed;
153 WORD wVersionRequested;
157 wVersionRequested = MAKEWORD(2, 2);
159 err = WSAStartup(wVersionRequested, &wsaData);
161 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1)
164 /* Initalize the event library */
165 base = event_base_new();
167 /* Initalize a timeout to terminate the test */
168 timeout = evtimer_new(base,timeout_cb,&timeout);
169 /* and watch for writability on one end of the pipe */
170 ev = event_new(base,pair[1],EV_WRITE | EV_PERSIST, write_cb, &ev);
175 evtimer_add(timeout, &tv);
179 start_cpu_usage_timer(&timer);
181 event_base_dispatch(base);
183 get_cpu_usage(&timer, &secPassed, &secUsed, &usage);
185 /* attempt to calculate our cpu usage over the test should be
188 printf("usec used=%d, usec passed=%d, cpu usage=%.2f%%\n",
190 (int)(secPassed*1e6),
193 if (usage > 50.0) /* way too high */