benchtests: Memory walking benchmark for memcpy

This benchmark is an attempt to eliminate cache effects from string
benchmarks.  The benchmark walks both ways through a large memory area
and copies different sizes of memory and alignments one at a time
instead of looping around in the same memory area.  This is a good
metric to have alongside the other memcpy benchmarks, especially for
larger sizes where the likelihood of the call being done only once is
pretty high.

	* benchtests/bench-memcpy-walk.c: New file.
	* benchtests/Makefile (string-benchset): Add it.

1 files changed, 2 insertions, 1 deletions

diff --git a/benchtests/Makefile b/benchtests/Makefile
index 3acc39cafa..d086cc671f 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -37,7 +37,8 @@ string-benchset := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
 		   strcat strchr strchrnul strcmp strcpy strcspn strlen \
 		   strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
 		   strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
-		   strcoll memcpy-large memcpy-random memmove-large memset-large
+		   strcoll memcpy-large memcpy-random memmove-large memset-large \
+		   memcpy-walk
 
 # Build and run locale-dependent benchmarks only if we're building natively.
 ifeq (no,$(cross-compiling))