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1 #include<stdio.h>
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2 #include<stdlib.h>
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3 #include<string.h>
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4 #include<sys/time.h>
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5 #include<unistd.h>
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6 #include"profile.h"
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7
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8 static unsigned long timeprof_overhead;
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9
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10 #define timeprof_get_time(t) {\
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11 struct timeval t0;\
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12 gettimeofday(&t0,NULL);\
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13 (t).sec=t0.tv_sec;\
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14 (t).usec=t0.tv_usec;}
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15
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16 void timeprof_begin(Timeprof t)
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17 {
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18 timeprof_get_time(t->begin);
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19 }
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20
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21 int timeprof_end(Timeprof t)
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22 {
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23 unsigned int etime;
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24 timeprof_get_time(t->end);
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25 if (t->begin.usec > t->end.usec) {
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26 t->end.usec += 1000000;
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27 t->end.sec--;
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28 }
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29 etime = ((t->end.sec - t->begin.sec) * 1000000 +
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30 (t->end.usec - t->begin.usec)) - timeprof_overhead;
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31 if (etime > t->peak) {
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32 t->peak = etime;
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33 }
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34 if (t->average > 0) {
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35 t->average += etime;
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36 t->average /= 2;
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37 } else {
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38 t->average = etime;
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39 }
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40 return etime;
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41 }
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42
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43 void timeprof_sprint(char *s, const char *profname, Timeprof t)
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44 {
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45 sprintf(s, "%s: average:%dusec, peak:%dusec", profname, t->average,
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46 t->peak);
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47 }
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48
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49 void timeprof_init()
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50 {
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51 struct time_profile t;
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52 timeprof_begin(&t);
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53 timeprof_overhead = timeprof_end(&t);
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54 }
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55
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56 Timeprof timeprof_new()
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57 {
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58 Timeprof t = (Timeprof) malloc(sizeof(struct time_profile));
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59 memset(t, 0, sizeof(struct time_profile));
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60 return t;
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61 }
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