Previously, `PAGE_THRESHOLD' was defined instead of
`PAGE_COPY_THRESHOLD', preventing the optimization of memory copy
operations using `vm_copy'.
Also, increase the threshold to 4 pages. XXX Tune this.
* sysdeps/mach/pagecopy.h (PAGE_THRESHOLD): Rename to `PAGE_COPY_THRESHOLD'.
Raise threshold to XXX pages.
---
sysdeps/mach/pagecopy.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sysdeps/mach/pagecopy.h b/sysdeps/mach/pagecopy.h
index 8db2147..75e700a 100644
--- a/sysdeps/mach/pagecopy.h
+++ b/sysdeps/mach/pagecopy.h
@@ -20,7 +20,7 @@
/* Threshold at which vm_copy is more efficient than well-optimized copying
by words. This parameter should be tuned as necessary. */
-#define PAGE_THRESHOLD (2 * PAGE_SIZE) /* XXX ? */
+#define PAGE_COPY_THRESHOLD (4 * PAGE_SIZE) /* XXX Tune this. */
#define PAGE_SIZE __vm_page_size
#define PAGE_COPY_FWD(dstp, srcp, nbytes_left, nbytes) \
--
2.1.3
