variuos old test code

[pandora-misc.git] / tests / memspeed.c

diff --git a/tests/memspeed.c b/tests/memspeed.c
new file mode 100644 (file)
index 0000000..418663e
--- /dev/null
+++ b/tests/memspeed.c
@@ -0,0 +1,81 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <malloc.h>
+#include <sys/time.h>
+
+extern void *memcpy_neon(void *dst, const void *src, size_t size);
+
+#define BUFSIZE (8*1024*1024)
+#define ITER 128
+
+static unsigned
+tv_diff(struct timeval *tv1, struct timeval *tv2)
+{
+    return (tv2->tv_sec - tv1->tv_sec) * 1000000 +
+        (tv2->tv_usec - tv1->tv_usec);
+}
+
+static void do_test(const char *name, void *p1, void *p2, size_t size,
+                    void *(*cpy)(void *, const void *, size_t))
+{
+    struct timeval t1, t2;
+    int i;
+
+    gettimeofday(&t1, NULL);
+    for (i = 0; i < ITER; i++)
+        cpy(p1, p2, size);
+    gettimeofday(&t2, NULL);
+
+    printf("%-8s %llu B/s\n", name,
+           (uint64_t)size * ITER * 1000000 / tv_diff(&t1, &t2));
+}
+
+static void *int32_cpy(void *dst, const void *src, size_t size)
+{
+    const uint32_t *s = src;
+    uint32_t *d = dst;
+    int i;
+
+    size /= 4;
+
+    for (i = 0; i < size; i++)
+        d[i] = s[i];
+
+    return dst;
+}
+
+static void *vec_cpy(void *dst, const void *src, size_t size)
+{
+    typedef int v4si __attribute__ ((vector_size(16)));
+    const v4si *s = src;
+    v4si *d = dst;
+
+    size /= 16;
+
+    while (size--)
+        *d++ = *s++;
+
+    return dst;
+}
+
+int main(int argc, char **argv)
+{
+    void *buf1, *buf2;
+
+    buf1 = memalign(64, BUFSIZE);
+    buf2 = memalign(64, BUFSIZE);
+
+    memset(buf2, 0, BUFSIZE);
+
+    do_test("memcpy",   buf1, buf2, BUFSIZE, memcpy);
+    do_test("INT32",    buf1, buf2, BUFSIZE, int32_cpy);
+    do_test("C SIMD",   buf1, buf2, BUFSIZE, vec_cpy);
+    do_test("ASM SIMD", buf1, buf2, BUFSIZE, memcpy_neon);
+
+    free(buf1);
+    free(buf2);
+
+    return 0;
+}