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Make test-changelist count cpu usage right on win32

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This commit is contained in:
Nick Mathewson 2010-08-06 13:34:51 -04:00
parent 9b60209675
commit ea1ea3d6ee
1 changed files with 91 additions and 22 deletions
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113
test/test-changelist.c
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@ -6,6 +6,7 @@
#ifdef WIN32
#include <winsock2.h>
#include <windows.h>
#else
#include <unistd.h>
#endif
@ -28,6 +29,88 @@
#include <event2/util.h>
#include <time.h>
struct cpu_usage_timer {
#ifdef WIN32
HANDLE thread;
FILETIME usertimeBegin;
FILETIME kerneltimeBegin;
#else
clock_t ticksBegin;
#endif
struct timeval timeBegin;
};
static void
start_cpu_usage_timer(struct cpu_usage_timer *timer)
{
#ifdef WIN32
int r;
FILETIME createtime, exittime;
timer->thread = GetCurrentThread();
r = GetThreadTimes(timer->thread, &createtime, &exittime,
&timer->usertimeBegin, &timer->kerneltimeBegin);
if (r==0) printf("GetThreadTimes failed.");
#else
timer->ticksBegin = clock();
#endif
evutil_gettimeofday(&timer->timeBegin, NULL);
}
#ifdef WIN32
static ev_int64_t
filetime_to_100nsec(const FILETIME *ft)
{
/* Number of 100-nanosecond units */
ev_int64_t n = ft->dwHighDateTime;
n <<= 32;
n += ft->dwLowDateTime;
return n;
}
static double
filetime_diff(const FILETIME *ftStart, const FILETIME *ftEnd)
{
ev_int64_t s, e, diff;
double r;
s = filetime_to_100nsec(ftStart);
e = filetime_to_100nsec(ftEnd);
diff = e - s;
r = (double) diff;
return r / 1.0e7;
}
#endif
static void
get_cpu_usage(struct cpu_usage_timer *timer, double *secElapsedOut,
double *secUsedOut, double *usageOut)
{
#ifdef WIN32
double usertime_seconds, kerneltime_seconds;
FILETIME createtime, exittime, usertimeEnd, kerneltimeEnd;
int r;
#else
clock_t ticksEnd;
#endif
struct timeval timeEnd, timeDiff;
double secondsPassed, secondsUsed;
#ifdef WIN32
r = GetThreadTimes(timer->thread, &createtime, &exittime,
&usertimeEnd, &kerneltimeEnd);
if (r==0) printf("GetThreadTimes failed.");
usertime_seconds = filetime_diff(&timer->usertimeBegin, &usertimeEnd);
kerneltime_seconds = filetime_diff(&timer->kerneltimeBegin, &kerneltimeEnd);
secondsUsed = kerneltime_seconds + usertime_seconds;
#else
ticksEnd = clock();
secondsUsed = (ticksEnd - timer->ticksBegin) / (double)CLOCKS_PER_SEC;
#endif
evutil_gettimeofday(&timeEnd, NULL);
evutil_timersub(&timeEnd, &timer->timeBegin, &timeDiff);
secondsPassed = timeDiff.tv_sec + (timeDiff.tv_usec / 1.0e6);
*secElapsedOut = secondsPassed;
*secUsedOut = secondsUsed;
*usageOut = secondsUsed / secondsPassed;
}
static void
write_cb(evutil_socket_t fd, short event, void *arg)
@ -62,14 +145,10 @@ main(int argc, char **argv)
int pair[2];
int res;
int tickspassed;
struct timeval timeBegin;
struct timeval timeEnd;
struct timeval tv;
struct cpu_usage_timer timer;
clock_t ticksBegin;
clock_t ticksEnd;
double usage;
double usage, secPassed, secUsed;
#ifdef WIN32
WORD wVersionRequested;
@ -98,29 +177,19 @@ main(int argc, char **argv)
event_add(ev, NULL);
ticksBegin = clock();
evutil_gettimeofday(&timeBegin,NULL);
start_cpu_usage_timer(&timer);
res = event_base_dispatch(base);
evutil_gettimeofday(&timeEnd,NULL);
ticksEnd = clock();
get_cpu_usage(&timer, &secPassed, &secUsed, &usage);
/* attempt to calculate our cpu usage over the test should be
virtually nil */
tickspassed = ((((timeEnd.tv_sec - timeBegin.tv_sec) * 1000000.0) +
(timeEnd.tv_usec - timeBegin.tv_usec)) *
((1.0 * CLOCKS_PER_SEC) / 1000000));
usage = 100.0 * (((int)(ticksEnd-ticksBegin) * 1.0) / tickspassed);
printf("ticks used=%d, ticks passed=%d, cpu usage=%.2f%%\n",
(int)(ticksEnd-ticksBegin),
tickspassed,
usage);
printf("usec used=%d, usec passed=%d, cpu usage=%.2f%%\n",
(int)(secUsed*1e6),
(int)(secPassed*1e6),
usage*100);
if (usage > 50.0) /* way too high */
return 1;