linux/pprof.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <sys/types.h>
   5 #include <sys/ipc.h>
   6 #include <sys/shm.h>
   7
   8 #include <pico/pico_int.h>
   9
  10 struct pp_counters *pp_counters;
  11 static int shmemid;
  12
  13 void pprof_init(void)
  14 {
  15         int this_is_new_shmem = 1;
  16         key_t shmemkey;
  17         void *shmem;
  18
  19 #ifndef PPROF_TOOL
  20         unsigned int tmp = pprof_get_one();
  21         printf("pprof: measured diff is %u\n", pprof_get_one() - tmp);
  22 #endif
  23
  24         shmemkey = ftok(".", 0x02ABC32E);
  25         if (shmemkey == -1)
  26         {
  27                 perror("pprof: ftok failed");
  28                 return;
  29         }
  30
  31 #ifndef PPROF_TOOL
  32         shmemid = shmget(shmemkey, sizeof(*pp_counters),
  33                 IPC_CREAT | IPC_EXCL | 0644);
  34         if (shmemid == -1)
  35 #endif
  36         {
  37                 shmemid = shmget(shmemkey, sizeof(*pp_counters),
  38                                 0644);
  39                 if (shmemid == -1)
  40                 {
  41                         perror("pprof: shmget failed");
  42                         return;
  43                 }
  44                 this_is_new_shmem = 0;
  45         }
  46
  47         shmem = shmat(shmemid, NULL, 0);
  48         if (shmem == (void *)-1)
  49         {
  50                 perror("pprof: shmat failed");
  51                 return;
  52         }
  53
  54         pp_counters = shmem;
  55         if (this_is_new_shmem) {
  56                 memset(pp_counters, 0, sizeof(*pp_counters));
  57                 printf("pprof: pp_counters cleared.\n");
  58         }
  59 }
  60
  61 void pprof_finish(void)
  62 {
  63         shmdt(pp_counters);
  64         shmctl(shmemid, IPC_RMID, NULL);
  65 }
  66
  67 #ifdef PPROF_TOOL
  68
  69 #define IT(n) { pp_##n, #n }
  70 static const struct {
  71         enum pprof_points pp;
  72         const char *name;
  73 } pp_tab[] = {
  74         IT(main),
  75         IT(frame),
  76         IT(draw),
  77         IT(sound),
  78         IT(m68k),
  79         IT(z80),
  80         IT(msh2),
  81         IT(ssh2),
  82         IT(dummy),
  83 };
  84
  85 int main(int argc, char *argv[])
  86 {
  87         unsigned long long old[pp_total_points], new[pp_total_points];
  88         int base = 0;
  89         int l, i;
  90
  91         pprof_init();
  92         if (pp_counters == NULL)
  93                 return 1;
  94
  95         if (argc >= 2)
  96                 base = atoi(argv[1]);
  97
  98         memset(old, 0, sizeof(old));
  99         for (l = 0; ; l++)
 100         {
 101                 if ((l & 0x1f) == 0) {
 102                         for (i = 0; i < ARRAY_SIZE(pp_tab); i++)
 103                                 printf("%6s ", pp_tab[i].name);
 104                         printf("\n");
 105                 }
 106
 107                 memcpy(new, pp_counters->counter, sizeof(new));
 108                 for (i = 0; i < ARRAY_SIZE(pp_tab); i++)
 109                 {
 110                         unsigned long long idiff = new[i] - old[i];
 111                         unsigned long long bdiff = (new[base] - old[base]) | 1;
 112                         printf("%6.2f ", (double)idiff * 100.0 / bdiff);
 113                 }
 114                 printf("\n");
 115                 memcpy(old, new, sizeof(old));
 116
 117                 if (argc < 3)
 118                         break;
 119                 usleep(atoi(argv[2]));
 120         }
 121
 122         return 0;
 123 }
 124
 125 #endif // PPROF_TOOL
 126