We need to have the host code close to the generated code to improve
branch prediction performance on some s390 systems. This change will
move valgrind text close to the initial aspace start for valgrind
allocations.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13688 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.ac b/configure.ac
index a4d33d2..0ccfe05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -564,9 +564,10 @@
VGCONF_ARCH_SEC=""
VGCONF_PLATFORM_PRI_CAPS="S390X_LINUX"
VGCONF_PLATFORM_SEC_CAPS=""
- # we want to have the generated code close to the dispatcher
- valt_load_address_pri_norml="0x401000000"
- valt_load_address_pri_inner="0x410000000"
+ # To improve branch prediction hit rate we want to have
+ # the generated code close to valgrind (host) code
+ valt_load_address_pri_norml="0x800000000"
+ valt_load_address_pri_inner="0x810000000"
valt_load_address_sec_norml="0xUNSET"
valt_load_address_sec_inner="0xUNSET"
AC_MSG_RESULT([ok (${ARCH_MAX}-${VGCONF_OS})])