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

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <sys/types.h>
   8 #ifdef _WIN32
   9   #include <winsock2.h>
  10   #include <ws2tcpip.h>
  11   #include <windows.h>
  12 #else
  13   #include <unistd.h>
  14   #include <sys/resource.h>
  15 #endif
  16
  17 #include <pcap.h>
  18
  19 #include "varattrs.h"
  20 #include "pcap/funcattrs.h"
  21
  22 #ifdef _WIN32
  23 #include "portability.h"
  24 #endif
  25
  26 int main(int argc _U_, char **argv _U_)
  27 {
  28   pcap_if_t *alldevs;
  29   int exit_status = 0;
  30   char errbuf[PCAP_ERRBUF_SIZE+1];
  31 #ifdef _WIN32
  32   FILETIME start_ktime, start_utime, end_ktime, end_utime;
  33   FILETIME dummy1, dummy2;
  34   ULARGE_INTEGER start_kticks, end_kticks, start_uticks, end_uticks;
  35   ULONGLONG ktime, utime, tottime;
  36 #else
  37   struct rusage start_rusage, end_rusage;
  38   struct timeval ktime, utime, tottime;
  39 #endif
  40
  41 #ifdef _WIN32
  42   if (!GetProcessTimes(GetCurrentProcess(), &dummy1, &dummy2,
  43                        &start_ktime, &start_utime))
  44   {
  45     fprintf(stderr, "GetProcessTimes() fails at start\n");
  46     exit(1);
  47   }
  48   start_kticks.LowPart = start_ktime.dwLowDateTime;
  49   start_kticks.HighPart = start_ktime.dwHighDateTime;
  50   start_uticks.LowPart = start_utime.dwLowDateTime;
  51   start_uticks.HighPart = start_utime.dwHighDateTime;
  52 #else
  53   if (getrusage(RUSAGE_SELF, &start_rusage) == -1) {
  54     fprintf(stderr, "getrusage() fails at start\n");
  55     exit(1);
  56   }
  57 #endif
  58   for (int i = 0; i < 500; i++)
  59   {
  60     if (pcap_findalldevs(&alldevs, errbuf) == -1)
  61     {
  62       fprintf(stderr,"Error in pcap_findalldevs: %s\n",errbuf);
  63       exit(1);
  64     }
  65     pcap_freealldevs(alldevs);
  66   }
  67
  68 #ifdef _WIN32
  69   if (!GetProcessTimes(GetCurrentProcess(), &dummy1, &dummy2,
  70                        &end_ktime, &end_utime))
  71   {
  72     fprintf(stderr, "GetProcessTimes() fails at end\n");
  73     exit(1);
  74   }
  75   end_kticks.LowPart = end_ktime.dwLowDateTime;
  76   end_kticks.HighPart = end_ktime.dwHighDateTime;
  77   end_uticks.LowPart = end_utime.dwLowDateTime;
  78   end_uticks.HighPart = end_utime.dwHighDateTime;
  79   ktime = end_kticks.QuadPart - start_kticks.QuadPart;
  80   utime = end_uticks.QuadPart - start_uticks.QuadPart;
  81   tottime = ktime + utime;
  82   printf("Total CPU secs: kernel %g, user %g, total %g\n",
  83       ((double)ktime) / 10000000.0,
  84       ((double)utime) / 10000000.0,
  85       ((double)tottime) / 10000000.0);
  86 #else
  87   if (getrusage(RUSAGE_SELF, &end_rusage) == -1) {
  88     fprintf(stderr, "getrusage() fails at end\n");
  89     exit(1);
  90   }
  91   timersub(&end_rusage.ru_stime, &start_rusage.ru_stime, &ktime);
  92   timersub(&end_rusage.ru_utime, &start_rusage.ru_utime, &utime);
  93   timeradd(&ktime, &utime, &tottime);
  94   printf("Total CPU secs: kernel %g, user %g, total %g\n",
  95       (double)ktime.tv_sec + ((double)ktime.tv_usec / 1000000.0),
  96       (double)utime.tv_sec + ((double)utime.tv_usec / 1000000.0),
  97       (double)tottime.tv_sec + ((double)tottime.tv_usec / 1000000.0));
  98 #endif
  99   exit(exit_status);
 100 }