Halve the size of the fast tt lookup cache. This improves ppc32
performance quite a bit, since the cache is emptied quite often on
ppc32, and a smaller cache is less intrusive in the real machine's L2
cache. On x86 the change doesn't seem to have much effect.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4947 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/pub_core_transtab_asm.h b/coregrind/pub_core_transtab_asm.h
index 60be732..6041dcd 100644
--- a/coregrind/pub_core_transtab_asm.h
+++ b/coregrind/pub_core_transtab_asm.h
@@ -32,7 +32,7 @@
#define __PUB_CORE_TRANSTAB_ASM_H
/* Constants for the fast translation lookup cache. */
-#define VG_TT_FAST_BITS 16
+#define VG_TT_FAST_BITS 15
#define VG_TT_FAST_SIZE (1 << VG_TT_FAST_BITS)
#define VG_TT_FAST_MASK ((VG_TT_FAST_SIZE) - 1)