simple profiler added

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@850 be3aeb3a-fb24-0410-a615-afba39da0efa

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
+