From 5fbe018d06951bc30441cd0779cb782bdc18b836 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Mon, 7 Jun 2010 14:39:08 -0700
Subject: [PATCH] tests: improve memcpy_speed

---
 testsuite/memcpy_speed.c | 70 ++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 59 insertions(+), 11 deletions(-)

diff --git a/testsuite/memcpy_speed.c b/testsuite/memcpy_speed.c
index 77b1849..8bf17f2 100644
--- a/testsuite/memcpy_speed.c
+++ b/testsuite/memcpy_speed.c
@@ -2,60 +2,108 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
+#include <math.h>
 
 #include <orc/orc.h>
 #include <orc-test/orctest.h>
 #include <orc-test/orcprofile.h>
 
+
 #define ALIGN(ptr,n) ((void *)((unsigned long)(ptr) & (~(unsigned long)(n-1))))
 
 int
 main(int argc, char *argv[])
 {
   char *s, *d;
-  uint32_t *src, *dest;
+  uint8_t *src, *dest;
   OrcProfile prof;
+  OrcProfile prof_libc;
   double ave, std;
+  double ave_libc, std_libc;
+  double null;
   int i,j;
   double cpufreq;
+  //const uint8_t zero = 0;
 
   orc_init ();
 
-  cpufreq = 1000e6;
+  //cpufreq = 2333e6;
+  cpufreq = 1;
 
   s = malloc(1024*1024*64+1024);
   d = malloc(1024*1024*64+1024);
-  src = ALIGN(s,128);
+  src = ALIGN(s,128) + 1;
   dest = ALIGN(d,128);
 
-  printf("orc_memset:\n");
+  orc_profile_init (&prof);
+  for(j=0;j<10;j++){
+    orc_profile_start(&prof);
+    orc_profile_stop(&prof);
+  }
+  orc_profile_get_ave_std (&prof, &null, &std);
+
+#if 0
+ // printf("orc_memset:\n");
   for(i=10;i<26;i++){
     orc_profile_init (&prof);
+    orc_profile_init (&prof_libc);
     for(j=0;j<10;j++){
       orc_profile_start(&prof);
       orc_memset (dest, 0, 1<<i);
       orc_profile_stop(&prof);
+      orc_profile_start(&prof_libc);
+      memset (dest, 0, 1<<i);
+      orc_profile_stop(&prof_libc);
     }
 
     orc_profile_get_ave_std (&prof, &ave, &std);
+    orc_profile_get_ave_std (&prof_libc, &ave_libc, &std_libc);
 
-    printf("%d: %10.4g %10.4g %10.4g %10.4g\n", i, ave, std,
-        ave/(1<<i), cpufreq/(ave/(1<<i)));
+#if 0
+    printf("%d: %10.4g %10.4g %10.4g %10.4g (libc %10.4g)\n", i, ave, std,
+        ave/(1<<i), cpufreq/(ave/(1<<i)),
+        cpufreq/(ave_libc/(1<<i)));
+    printf("%d %10.4g %10.4g %10.4g\n", i,
+        cpufreq/(ave/(1<<i)), cpufreq/(ave_libc/(1<<i)));
+#endif
   }
+#endif
+
+  //printf("orc_memcpy:\n");
+  //for(i=10;i<26;i++){
+  for(i=0;i<200;i++){
+    double x = i*0.1 + 6.0;
+    int size = pow(2.0, x);
 
-  printf("orc_memcpy:\n");
-  for(i=10;i<26;i++){
     orc_profile_init (&prof);
     for(j=0;j<10;j++){
       orc_profile_start(&prof);
-      orc_memcpy (dest, src, 1<<i);
+      orc_memcpy (dest, src, size);
       orc_profile_stop(&prof);
     }
 
+    orc_profile_init (&prof_libc);
+    for(j=0;j<10;j++){
+      orc_profile_start(&prof_libc);
+      memcpy (dest, src, size);
+      orc_profile_stop(&prof_libc);
+    }
+
     orc_profile_get_ave_std (&prof, &ave, &std);
+    orc_profile_get_ave_std (&prof_libc, &ave_libc, &std_libc);
+
+    ave -= null + 60;
+    ave_libc -= null + 35;
 
-    printf("%d: %10.4g %10.4g %10.4g %10.4g\n", i, ave, std,
-        ave/(1<<i), cpufreq/(ave/(1<<i)));
+    //printf("%d: %10.4g %10.4g %10.4g %10.4g (libc %10.4g)\n", i, ave, std,
+    //    ave/(1<<i), cpufreq/(ave/(1<<i)),
+    //    cpufreq/(ave_libc/(1<<i)));
+    printf("%g %10.4g %10.4g\n", x,
+        cpufreq/(ave/(size)), cpufreq/(ave_libc/(size)));
+    //printf("%g %10.4g %10.4g\n", x,
+    //    32*(ave/(size)), 32*(ave_libc/(size)));
+    fflush (stdout);
   }
 
   return 0;
-- 
2.7.4