[PATCH] Additional compiler optimization options

From: John
Date: Wed Dec 05 2012 - 17:15:21 EST

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Came across this and wanted to show it to others more knowledgeable for feedback. Is this value-added or not? Upstream URL is: https://gitorious.org/rummage/random_patches

Please cc me on replies as I am not a regular subscriber to lkml. Thank you.

--- linux-3.6/arch/x86/include/asm/module.h2012-04-29 18:43:58.239336240 -0700
+++ linux-3.6.mod/arch/x86/include/asm/module.h2012-04-29 18:43:41.609545221 -0700
@@ -17,6 +17,14 @@
#define MODULE_PROC_FAMILY "586MMX "
#elif defined CONFIG_MCORE2
#define MODULE_PROC_FAMILY "CORE2 "
+#elif defined CONFIG_MCOREI7
+#define MODULE_PROC_FAMILY "COREI7 "
+#elif defined CONFIG_MCOREI7AVX
+#define MODULE_PROC_FAMILY "COREI7AVX "
+#elif defined CONFIG_MCOREAVXI
+#define MODULE_PROC_FAMILY "COREAVXI "
+#elif defined CONFIG_MCOREAVX2
+#define MODULE_PROC_FAMILY "COREAVX2 "
#elif defined CONFIG_MATOM
#define MODULE_PROC_FAMILY "ATOM "
#elif defined CONFIG_M686
@@ -35,6 +43,14 @@
#define MODULE_PROC_FAMILY "K7 "
#elif defined CONFIG_MK8
#define MODULE_PROC_FAMILY "K8 "
+#elif defined CONFIG_MBARCELONA
+#define MODULE_PROC_FAMILY "BARCELONA "
+#elif defined CONFIG_MBOBCAT
+#define MODULE_PROC_FAMILY "BOBCAT "
+#elif defined CONFIG_MBULLDOZER
+#define MODULE_PROC_FAMILY "BULLDOZER "
+#elif defined CONFIG_MPILEDRIVER
+#define MODULE_PROC_FAMILY "PILEDRIVER "
#elif defined CONFIG_MELAN
#define MODULE_PROC_FAMILY "ELAN "
#elif defined CONFIG_MCRUSOE
--- linux-3.6/arch/x86/Kconfig.cpu2012-04-29 18:43:58.249336198 -0700
+++ linux-3.6.mod/arch/x86/Kconfig.cpu2012-04-29 18:40:46.091751798 -0700
@@ -147,7 +147,7 @@

config MK6
-bool "K6/K6-II/K6-III"
+bool "AMD K6/K6-II/K6-III"
depends on X86_32
---help---
Select this for an AMD K6-family processor. Enables use of
@@ -155,7 +155,7 @@
flags to GCC.

config MK7
-bool "Athlon/Duron/K7"
+bool "AMD Athlon/Duron/K7"
depends on X86_32
---help---
Select this for an AMD Athlon K7-family processor. Enables use of
@@ -163,12 +163,40 @@
flags to GCC.

config MK8
-bool "Opteron/Athlon64/Hammer/K8"
+bool "AMD Opteron/Athlon64/Hammer/K8"
---help---
Select this for an AMD Opteron or Athlon64 Hammer-family processor.
Enables use of some extended instructions, and passes appropriate
optimization flags to GCC.

+config MBARCELONA
+bool "AMD Barcelona"
+---help---
+ Select this for AMD Barcelona and newer processors.
+
+ Enables -march=barcelona
+
+config MBOBCAT
+bool "AMD Bobcat"
+---help---
+ Select this for AMD Bobcat processors.
+
+ Enables -march=btver1
+
+config MBULLDOZER
+bool "AMD Bulldozer"
+---help---
+ Select this for AMD Bulldozer processors.
+
+ Enables -march=bdver1
+
+config MPILEDRIVER
+bool "AMD Piledriver"
+---help---
+ Select this for AMD Piledriver processors.
+
+ Enables -march=bdver2
+
config MCRUSOE
bool "Crusoe"
depends on X86_32
@@ -260,7 +288,7 @@
in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.

config MCORE2
-bool "Core 2/newer Xeon"
+bool "Intel Core 2"
---help---

Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
@@ -268,6 +296,41 @@
family in /proc/cpuinfo. Newer ones have 6 and older ones 15
(not a typo)

+ Enables -march=core2
+
+config MCOREI7
+bool "Intel Core i7"
+---help---
+
+ Select this for the Intel Nehalem platform. Intel Nehalem proecessors
+ include Core i3, i5, i7, Xeon: 34xx, 35xx, 55xx, 56xx, 75xx processors.
+
+ Enables -march=corei7
+
+config MCOREI7AVX
+bool "Intel Core 2nd Gen AVX"
+---help---
+
+ Select this for 2nd Gen Core processors including Sandy Bridge.
+
+ Enables -march=corei7-avx
+
+config MCOREAVXI
+bool "Intel Core 3rd Gen AVX"
+---help---
+
+ Select this for 3rd Gen Core processors including Ivy Bridge.
+
+ Enables -march=corei7-avx
+
+config MCOREAVX2
+bool "Intel Core AVX-2"
+---help---
+
+ Select this for AVX-2 enabled processors including Haswell.
+
+ Enables -march=corei7-avx-2
+
config MATOM
bool "Intel Atom"
---help---
@@ -312,7 +375,7 @@
config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || MPSC
-default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
+default "6" if MK7 || MK8 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MPENTIUMM || MCORE2 || MCOREI7 || MCOREI7AVX || MCOREAVXI || MCOREAVX2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
default "4" if MELAN || M486 || M386 || MGEODEGX1
default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX

@@ -363,11 +426,11 @@

config X86_INTEL_USERCOPY
def_bool y
-depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
+depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MBARCELONA || MEFFICEON || MCORE2 || MCOREI7 || MCOREI7AVX || MCOREAVXI || MCOREAVX2

config X86_USE_PPRO_CHECKSUM
def_bool y
-depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
+depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MCOREI7 || MCOREI7AVX || MCOREAVXI || MCOREAVX2 || MATOM

config X86_USE_3DNOW
def_bool y
@@ -395,17 +458,17 @@

config X86_TSC
def_bool y
-depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) && !X86_NUMAQ) || X86_64
+depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MCOREI7 || MCOREI7-AVX || MATOM) && !X86_NUMAQ) || X86_64

config X86_CMPXCHG64
def_bool y
-depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM
+depends on X86_PAE || X86_64 || MCORE2 || MCOREI7 || MCOREI7AVX || MCOREAVXI || MCOREAVX2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM

# this should be set for all -march=.. options where the compiler
# generates cmov.
config X86_CMOV
def_bool y
-depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
+depends on (MK8 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MK7 || MCORE2 || MCOREI7 || MCOREI7AVX || MCOREAVXI || MCOREAVX2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)

config X86_MINIMUM_CPU_FAMILY
int
--- linux-3.6/arch/x86/Makefile2012-04-29 18:43:58.249336198 -0700
+++ linux-3.6.mod/arch/x86/Makefile2012-04-29 18:41:51.260932642 -0700
@@ -51,10 +51,22 @@

# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
+ cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona)
+ cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1)
+ cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1)
+ cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2)
cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)

cflags-$(CONFIG_MCORE2) += \
- $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
+ $(call cc-option,-march=core2,$(call cc-option,-mtune=core2))
+ cflags-$(CONFIG_MCOREI7) += \
+ $(call cc-option,-march=corei7,$(call cc-option,-mtune=corei7))
+ cflags-$(CONFIG_MCOREI7AVX) += \
+ $(call cc-option,-march=corei7-avx,$(call cc-option,-mtune=corei7-avx))
+ cflags-$(CONFIG_MCOREAVXI) += \
+ $(call cc-option,-march=core-avx-i,$(call cc-option,-mtune=core-avx-i))
+ cflags-$(CONFIG_MCOREAVX2) += \
+ $(call cc-option,-march=core-avx2,$(call cc-option,-mtune=core-avx2))
cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
--- linux-3.6/arch/x86/Makefile_32.cpu2012-04-29 18:43:58.269335977 -0700
+++ linux-3.6.mod/arch/x86/Makefile_32.cpu2012-04-29 18:42:39.120330975 -0700
@@ -25,6 +25,10 @@
# They make zero difference whatsosever to performance at this time.
cflags-$(CONFIG_MK7)+= -march=athlon
cflags-$(CONFIG_MK8)+= $(call cc-option,-march=k8,-march=athlon)
+cflags-$(CONFIG_MBARCELONA)+= $(call cc-option,-march=barcelona,-march=athlon)
+cflags-$(CONFIG_MBOBCAT)+= $(call cc-option,-march=btver1,-march=athlon)
+cflags-$(CONFIG_MBULLDOZER)+= $(call cc-option,-march=bdver1,-march=athlon)
+cflags-$(CONFIG_MPILEDRIVER)+= $(call cc-option,-march=bdver2,-march=athlon)
cflags-$(CONFIG_MCRUSOE)+= -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MEFFICEON)+= -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MWINCHIPC6)+= $(call cc-option,-march=winchip-c6,-march=i586)
@@ -33,6 +37,10 @@
cflags-$(CONFIG_MVIAC3_2)+= $(call cc-option,-march=c3-2,-march=i686)
cflags-$(CONFIG_MVIAC7)+= -march=i686
cflags-$(CONFIG_MCORE2)+= -march=i686 $(call tune,core2)
+cflags-$(CONFIG_MCOREI7)+= -march=i686 $(call tune,corei7)
+cflags-$(CONFIG_MCOREI7AVX)+= -march=i686 $(call tune,corei7-avx)
+cflags-$(CONFIG_MCOREAVXI)+= -march=i686 $(call tune,core-avx-i)
+cflags-$(CONFIG_MCOREAVX2)+= -march=i686 $(call tune,core-avx-2)
cflags-$(CONFIG_MATOM)+= $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
--
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Next message: Serge Hallyn: "Re: [RFC] Capabilities still can't be inherited by normal programs"
Previous message: Naoya Horiguchi: "Re: [PATCH 3/3] HWPOISON, hugetlbfs: fix RSS-counter warning"
Next in thread: Borislav Petkov: "Re: [PATCH] Additional compiler optimization options"
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