benchtests: Make memcpy benchmarks print results in json

Print the benchmark output for various memcpy benchmarks in json so
that it can be predictably parsed and analyzed.

	* benchtests/bench-memcpy-large.c: Include json-lib.h.
	(do_one_test): Print json.
	(do_test): Likewise.
	(test_main): Likewise.
	* benchtests/bench-memcpy-random.c: Include json-lib.h.
	(do_one_test): Print json.
	(do_test): Likewise.
	(test_main): Likewise.
	* benchtests/bench-memcpy.c: Include json-lib.h.
	(do_one_test): Print json.
	(do_test): Likewise.
	(test_main): Likewise.

1 files changed, 49 insertions, 26 deletions

diff --git a/benchtests/bench-memcpy.c b/benchtests/bench-memcpy.c
index 6d0b9fbd47..92ecc64e82 100644
--- a/benchtests/bench-memcpy.c
+++ b/benchtests/bench-memcpy.c
@@ -46,10 +46,12 @@ builtin_memcpy (char *dst, const char *src, size_t n)
 }
 #endif
 
+# include "json-lib.h"
+
 typedef char *(*proto_t) (char *, const char *, size_t);
 
 static void
-do_one_test (impl_t *impl, char *dst, const char *src,
+do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,
 	     size_t len)
 {
   size_t i, iters = INNER_LOOP_ITERS;
@@ -84,11 +86,11 @@ do_one_test (impl_t *impl, char *dst, const char *src,
 
   TIMING_DIFF (cur, start, stop);
 
-  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+  json_element_double (json_ctx, (double) cur / (double) iters);
 }
 
 static void
-do_test (size_t align1, size_t align2, size_t len)
+do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len)
 {
   size_t i, j;
   char *s1, *s2;
@@ -107,61 +109,82 @@ do_test (size_t align1, size_t align2, size_t len)
   for (i = 0, j = 1; i < len; i++, j += 23)
     s1[i] = j;
 
-  printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+  json_element_object_begin (json_ctx);
+  json_attr_uint (json_ctx, "length", (double) len);
+  json_attr_uint (json_ctx, "align1", (double) align1);
+  json_attr_uint (json_ctx, "align2", (double) align2);
+  json_array_begin (json_ctx, "timings");
 
   FOR_EACH_IMPL (impl, 0)
-    do_one_test (impl, s2, s1, len);
+    do_one_test (json_ctx, impl, s2, s1, len);
 
-  putchar ('\n');
+  json_array_end (json_ctx);
+  json_element_object_end (json_ctx);
 }
 
 int
 test_main (void)
 {
+  json_ctx_t json_ctx;
   size_t i;
 
   test_init ();
 
-  printf ("%23s", "");
+  json_init (&json_ctx, 0, stdout);
+
+  json_document_begin (&json_ctx);
+  json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
+
+  json_attr_object_begin (&json_ctx, "functions");
+  json_attr_object_begin (&json_ctx, "memcpy");
+  json_attr_string (&json_ctx, "bench-variant", "default");
+
+  json_array_begin (&json_ctx, "ifuncs");
   FOR_EACH_IMPL (impl, 0)
-    printf ("\t%s", impl->name);
-  putchar ('\n');
+    json_element_string (&json_ctx, impl->name);
+  json_array_end (&json_ctx);
 
+  json_array_begin (&json_ctx, "results");
   for (i = 0; i < 18; ++i)
     {
-      do_test (0, 0, 1 << i);
-      do_test (i, 0, 1 << i);
-      do_test (0, i, 1 << i);
-      do_test (i, i, 1 << i);
+      do_test (&json_ctx, 0, 0, 1 << i);
+      do_test (&json_ctx, i, 0, 1 << i);
+      do_test (&json_ctx, 0, i, 1 << i);
+      do_test (&json_ctx, i, i, 1 << i);
     }
 
   for (i = 0; i < 32; ++i)
     {
-      do_test (0, 0, i);
-      do_test (i, 0, i);
-      do_test (0, i, i);
-      do_test (i, i, i);
+      do_test (&json_ctx, 0, 0, i);
+      do_test (&json_ctx, i, 0, i);
+      do_test (&json_ctx, 0, i, i);
+      do_test (&json_ctx, i, i, i);
     }
 
   for (i = 3; i < 32; ++i)
     {
       if ((i & (i - 1)) == 0)
 	continue;
-      do_test (0, 0, 16 * i);
-      do_test (i, 0, 16 * i);
-      do_test (0, i, 16 * i);
-      do_test (i, i, 16 * i);
+      do_test (&json_ctx, 0, 0, 16 * i);
+      do_test (&json_ctx, i, 0, 16 * i);
+      do_test (&json_ctx, 0, i, 16 * i);
+      do_test (&json_ctx, i, i, 16 * i);
     }
 
   for (i = 32; i < 64; ++i)
     {
-      do_test (0, 0, 32 * i);
-      do_test (i, 0, 32 * i);
-      do_test (0, i, 32 * i);
-      do_test (i, i, 32 * i);
+      do_test (&json_ctx, 0, 0, 32 * i);
+      do_test (&json_ctx, i, 0, 32 * i);
+      do_test (&json_ctx, 0, i, 32 * i);
+      do_test (&json_ctx, i, i, 32 * i);
     }
 
-  do_test (0, 0, getpagesize ());
+  do_test (&json_ctx, 0, 0, getpagesize ());
+
+  json_array_end (&json_ctx);
+  json_attr_object_end (&json_ctx);
+  json_attr_object_end (&json_ctx);
+  json_document_end (&json_ctx);
 
   return ret;
 }