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