Messages in this thread Patch in this message | | | Date | Thu, 4 Sep 2008 13:46:11 +0200 | From | Andi Kleen <> | Subject | [PATCH] Drop -funroll-loops for csum_partial_64.c |
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Drop -funroll-loops for csum_partial_64.c
I did some rebenchmarking with modern compilers and dropping -funroll-loops makes the function consistently go faster by a few percent. So drop that flag.
Thanks to Richard Guenther for a hint.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- arch/x86/lib/Makefile | 3 --- 1 file changed, 3 deletions(-)
Index: linux-2.6.27-rc4-misc/arch/x86/lib/Makefile =================================================================== --- linux-2.6.27-rc4-misc.orig/arch/x86/lib/Makefile +++ linux-2.6.27-rc4-misc/arch/x86/lib/Makefile @@ -17,9 +17,6 @@ ifeq ($(CONFIG_X86_32),y) lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o else obj-y += io_64.o iomap_copy_64.o - - CFLAGS_csum-partial_64.o := -funroll-loops - lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o lib-y += thunk_64.o clear_page_64.o copy_page_64.o lib-y += memmove_64.o memset_64.o
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