The Tcpdump Group git mirrors - libpcap/blob - testprogs/findalldevstest-perf.c

   1 #include <config.h>
   2
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <sys/types.h>
   6 #ifdef _WIN32
   7   #include <winsock2.h>
   8   #include <ws2tcpip.h>
   9   #include <windows.h>
  10 #else
  11   #include <unistd.h>
  12   #include <sys/resource.h>
  13 #endif
  14
  15 #include <pcap.h>
  16
  17 #include "varattrs.h"
  18 #include "pcap/funcattrs.h"
  19 #include "portability.h"
  20
  21 int main(int argc _U_, char **argv _U_)
  22 {
  23   pcap_if_t *alldevs;
  24   int exit_status = 0;
  25   char errbuf[PCAP_ERRBUF_SIZE+1];
  26 #ifdef _WIN32
  27   FILETIME start_ktime, start_utime, end_ktime, end_utime;
  28   FILETIME dummy1, dummy2;
  29   ULARGE_INTEGER start_kticks, end_kticks, start_uticks, end_uticks;
  30   ULONGLONG ktime, utime, tottime;
  31 #else
  32   struct rusage start_rusage, end_rusage;
  33   struct timeval ktime, utime, tottime;
  34 #endif
  35
  36 #ifdef _WIN32
  37   if (!GetProcessTimes(GetCurrentProcess(), &dummy1, &dummy2,
  38                        &start_ktime, &start_utime))
  39   {
  40     fprintf(stderr, "GetProcessTimes() fails at start\n");
  41     exit(1);
  42   }
  43   start_kticks.LowPart = start_ktime.dwLowDateTime;
  44   start_kticks.HighPart = start_ktime.dwHighDateTime;
  45   start_uticks.LowPart = start_utime.dwLowDateTime;
  46   start_uticks.HighPart = start_utime.dwHighDateTime;
  47 #else
  48   if (getrusage(RUSAGE_SELF, &start_rusage) == -1) {
  49     fprintf(stderr, "getrusage() fails at start\n");
  50     exit(1);
  51   }
  52 #endif
  53   for (int i = 0; i < 500; i++)
  54   {
  55     if (pcap_findalldevs(&alldevs, errbuf) == -1)
  56     {
  57       fprintf(stderr,"Error in pcap_findalldevs: %s\n",errbuf);
  58       exit(1);
  59     }
  60     pcap_freealldevs(alldevs);
  61   }
  62
  63 #ifdef _WIN32
  64   if (!GetProcessTimes(GetCurrentProcess(), &dummy1, &dummy2,
  65                        &end_ktime, &end_utime))
  66   {
  67     fprintf(stderr, "GetProcessTimes() fails at end\n");
  68     exit(1);
  69   }
  70   end_kticks.LowPart = end_ktime.dwLowDateTime;
  71   end_kticks.HighPart = end_ktime.dwHighDateTime;
  72   end_uticks.LowPart = end_utime.dwLowDateTime;
  73   end_uticks.HighPart = end_utime.dwHighDateTime;
  74   ktime = end_kticks.QuadPart - start_kticks.QuadPart;
  75   utime = end_uticks.QuadPart - start_uticks.QuadPart;
  76   tottime = ktime + utime;
  77   printf("Total CPU secs: kernel %g, user %g, total %g\n",
  78       ((double)ktime) / 10000000.0,
  79       ((double)utime) / 10000000.0,
  80       ((double)tottime) / 10000000.0);
  81 #else
  82   if (getrusage(RUSAGE_SELF, &end_rusage) == -1) {
  83     fprintf(stderr, "getrusage() fails at end\n");
  84     exit(1);
  85   }
  86   timersub(&end_rusage.ru_stime, &start_rusage.ru_stime, &ktime);
  87   timersub(&end_rusage.ru_utime, &start_rusage.ru_utime, &utime);
  88   timeradd(&ktime, &utime, &tottime);
  89   printf("Total CPU secs: kernel %g, user %g, total %g\n",
  90       (double)ktime.tv_sec + ((double)ktime.tv_usec / 1000000.0),
  91       (double)utime.tv_sec + ((double)utime.tv_usec / 1000000.0),
  92       (double)tottime.tv_sec + ((double)tottime.tv_usec / 1000000.0));
  93 #endif
  94   exit(exit_status);
  95 }