simple profiler added

[libpicofe.git] / linux / pprof.c

diff --git a/linux/pprof.c b/linux/pprof.c
new file mode 100644 (file)
index 0000000..e1ecd1f
--- /dev/null
+++ b/linux/pprof.c
@@ -0,0 +1,126 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+#include <pico/pico_int.h>
+
+struct pp_counters *pp_counters;
+static int shmemid;
+
+void pprof_init(void)
+{
+       int this_is_new_shmem = 1;
+       key_t shmemkey;
+       void *shmem;
+
+#ifndef PPROF_TOOL
+       unsigned int tmp = pprof_get_one();
+       printf("pprof: measured diff is %u\n", pprof_get_one() - tmp);
+#endif
+
+       shmemkey = ftok(".", 0x02ABC32E);
+       if (shmemkey == -1)
+       {
+               perror("pprof: ftok failed");
+               return;
+       }
+
+#ifndef PPROF_TOOL
+       shmemid = shmget(shmemkey, sizeof(*pp_counters),
+               IPC_CREAT | IPC_EXCL | 0644);
+       if (shmemid == -1)
+#endif
+       {
+               shmemid = shmget(shmemkey, sizeof(*pp_counters),
+                               0644);
+               if (shmemid == -1)
+               {
+                       perror("pprof: shmget failed");
+                       return;
+               }
+               this_is_new_shmem = 0;
+       }
+
+       shmem = shmat(shmemid, NULL, 0);
+       if (shmem == (void *)-1)
+       {
+               perror("pprof: shmat failed");
+               return;
+       }
+
+       pp_counters = shmem;
+       if (this_is_new_shmem) {
+               memset(pp_counters, 0, sizeof(*pp_counters));
+               printf("pprof: pp_counters cleared.\n");
+       }
+}
+
+void pprof_finish(void)
+{
+       shmdt(pp_counters);
+       shmctl(shmemid, IPC_RMID, NULL);
+}
+
+#ifdef PPROF_TOOL
+
+#define IT(n) { pp_##n, #n }
+static const struct {
+       enum pprof_points pp;
+       const char *name;
+} pp_tab[] = {
+       IT(main),
+       IT(frame),
+       IT(draw),
+       IT(sound),
+       IT(m68k),
+       IT(z80),
+       IT(msh2),
+       IT(ssh2),
+       IT(dummy),
+};
+
+int main(int argc, char *argv[])
+{
+       unsigned long long old[pp_total_points], new[pp_total_points];
+       int base = 0;
+       int l, i;
+
+       pprof_init();
+       if (pp_counters == NULL)
+               return 1;
+
+       if (argc >= 2)
+               base = atoi(argv[1]);
+
+       memset(old, 0, sizeof(old));
+       for (l = 0; ; l++)
+       {
+               if ((l & 0x1f) == 0) {
+                       for (i = 0; i < ARRAY_SIZE(pp_tab); i++)
+                               printf("%6s ", pp_tab[i].name);
+                       printf("\n");
+               }
+
+               memcpy(new, pp_counters->counter, sizeof(new));
+               for (i = 0; i < ARRAY_SIZE(pp_tab); i++)
+               {
+                       unsigned long long idiff = new[i] - old[i];
+                       unsigned long long bdiff = (new[base] - old[base]) | 1;
+                       printf("%6.2f ", (double)idiff * 100.0 / bdiff);
+               }
+               printf("\n");
+               memcpy(old, new, sizeof(old));
+
+               if (argc < 3)
+                       break;
+               usleep(atoi(argv[2]));
+       }
+
+       return 0;
+}
+
+#endif // PPROF_TOOL
+