Warning: GCC 4.2 and above support -march=native, which automatically detects the optimum settings to use based on your processor. -march=native also detects and applies additional settings beyond -march specific to your CPU, (eg. -msse4). Unless you have a specific reason not to (e.g. distcc cross-compiling), you should probably be using -march=native rather than anything listed below. To find out what -march=native actually picks on the local hardware see Safe Cflags#-march=native.
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[edit]Pentium
vendor_id : GenuineIntel cpu family : 5 model : 2 model name : Pentium 75 - 200
CHOST="i586-pc-linux-gnu" CFLAGS="-march=pentium -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium w/ MMX
CHOST="i586-pc-linux-gnu" CFLAGS="-march=pentium-mmx -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium Pro
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentiumpro -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium II
vendor_id : GenuineIntel cpu family : 6 model : 3, 5
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium2 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 model name : Mobile Pentium II stepping : 10 cpu MHz : 397.082 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr bogomips : 794.75 clflush size : 32
[edit]Celeron (Mendocino), aka Celeron1
vendor_id : GenuineIntel cpu family : 6 model : 6 stepping : 0
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium2 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 model name : Celeron (Mendocino) stepping : 0 cpu MHz : 334.108 cache size : 128 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr up bogomips : 686.94 clflush size : 32
[edit]Pentium III/ Mobile Celeron
vendor_id : GenuineIntel cpu family : 6 model : 7, 8, 11
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 6 cpu MHz : 863.934 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 1728.97 clflush size : 32
[edit]Celeron (Coppermine)
vendor_id : GenuineIntel cpu family : 6 model : 8 stepping : 10
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Celeron (Willamette)
vendor_id : GenuineIntel cpu family : 15 model : 1 model name : Intel(R) Celeron(R) CPU XXXXGHz stepping : 3
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium M(Centrino)/Celeron M
vendor_id : GenuineIntel cpu family : 6 model : 9 or 13 model name : Intel(R) Pentium(R) M processor XXXXMHz
For gcc 3.3 or older:
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -msse2 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"For gcc 3.4 and later:
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium-m -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"The Celeron M is based on the Pentium M but it has half the L2 cache and does not support the SpeedStep technology.
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 13 model name : Intel(R) Pentium(R) M processor 2.00GHz stepping : 8 cpu MHz : 800.000 cache size : 2048 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts est tm2 bogomips : 1597.70 clflush size : 64
[edit]Mobile Pentium 4-M (Northwood)
vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Mobile Intel(R) Pentium(R) 4 - M CPU X.XXGHz
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium 4
vendor_id : GenuineIntel cpu family : 15 model : 0 or 1 or 2 model name : Intel(R) Pentium(R) 4 CPU 1.70GHz
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Pentium 4 (Prescott) / Celeron D
vendor_id : GenuineIntel cpu family : 15 model : 3 or 4 model name : Intel(R) Pentium(R) 4 CPU XXXGHz -or- Intel(R) Celeron(R) CPU XXXGHz
32-bit profile (x86):
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"64-bit profile (amd64):
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"Note: You can verify the chip is a Prescott by looking for pni in the flags section of /proc/cpuinfo. This indicates support for SSE3.
In 2004, Intel started branding processors with the Prescott core as Intel Celeron D.
[edit]Pentium D 8xx / 9xx
vendor_id : GenuineIntel cpu family : 15 model : 4, 6 model name : Intel(R) Pentium(R) D CPU x.xxGHz
32-bit profile (x86):
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"64-bit profile (amd64):
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"[edit]Xeon w/o EM64T
vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Xeon(TM) CPU 2.80GHz
CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"[edit]Xeon w/EM64T (also Pentium 4 P6xx or Celeron M 5xx)
vendor_id : GenuineIntel cpu family : 15 model : 4,6 model name : Intel(R) Xeon(R) CPU XXXXMHz model name : Intel(R) Celeron(R) M CPU 5xx @ XXXGHz
32-bit profile (x86):
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"64-bit profile (amd64):
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"[edit]Intel Core Solo/Duo, Pentium Dual-Core T20xx/T21xx
vendor_id : GenuineIntel cpu family : 6 model : 14, 22 model name : Genuine Intel(R) CPU TXXXX @ X.XXGHz model name : Intel(R) Celeron(R) CPU 220 @ 1.20GHz model name : Intel(R) Celeron(R) CPU 4X0 @ X.XXGHz model name : Intel(R) Celeron(R) M CPU 4X0 @ X.XXGHz
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"Notes:
It has been confirmed by hongjiu.lu@intel.com that prescott is the correct microarchitecture to use with this CPU.
The newer (eg. 420) Celeron-M processors are Core Solo based, not Pentium-M based. If your processor's family and model are 6 and 14, then you should use the -march=prescott option.
Both the Celeron 4x0 and 220 run fine with Processor family (Pentium M) selected in the kernel.
[edit]Core 2 Duo/Quad, Xeon 51xx/53xx/54xx/3360, Pentium Dual-Core T23xx+/Exxxx, Celeron Dual-Core
vendor_id : GenuineIntel cpu family : 6 model : 15, 23 model name : Intel(R) Core(TM)2 CPU XXXX @ XXXGHz model name : Intel(R) Celeron(R) CPU E3400 @ 2.60GHz model name : Intel(R) Pentium(R) Dual CPU T23xx @ XXXGHz model name : Intel(R) Xeon(R) CPU X3360
32 bit profile (x86) for < GCC 4.3:
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"32 bit profile (x86) for >= GCC 4.3:
CHOST="i686-pc-linux-gnu" CFLAGS="-march=core2 -O2 -pipe -fomit-frame-pointer" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for < GCC 4.3
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for >= GCC 4.3
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=core2 -O2 -pipe" CXXFLAGS="${CFLAGS}"[edit]Core i7 and Core i5, Xeon 55xx
vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
vendor_id : GenuineIntel cpu family : 6 model : 37 model name : Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz / 660 @ 3.33 GHz
vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i5-2430M CPU @ 2.40GHz stepping : 7 cpu MHz : 2394.550 cache size : 3072 KB
vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5570 @ 2.93GHz
32 bit profile (x86)
CHOST="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -fomit-frame-pointer -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for < GCC 4.3
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for GCC 4.3
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=core2 -mtune=generic -O2 -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for GCC 4.6
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=corei7 -O2 -pipe" CXXFLAGS="${CFLAGS}"Warning: Note that Sandy Bridge CPUs use a march and mtune of corei7-avx not corei7. See the man page for gcc.
[edit]Atom 230, Atom 330, Atom N-Series
vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU 230 @ 1.60GHz stepping : 2 cpu MHz : 1596.175 cache size : 512 KB
vendor_id : GenuineIntel cpu family : 6 model : 38 model name : Genuine Intel(R) CPU @ 1.60GHz stepping : 1 cpu MHz : 1600.033 cache size : 512 KB
32 bit profile (x86):
CHOST="i686-pc-linux-gnu" CFLAGS="-march=atom -O2 -fomit-frame-pointer -pipe" CXXFLAGS="${CFLAGS}"32 bit gcc 4.5.3 (x86)
CHOST="i686-pc-linux-gnu" CFLAGS="-march=native -O2 -fomit-frame-pointer -pipe -mfpmath=sse" CXXFLAGS="${CFLAGS}"These more aggressive flags above improve single threaded performance benchmarks (ie nbench) on the atom 330 with GCC 4.5.3 considerably, most notably there is a floating point performance increase of ~20%.
64 bit profile (amd64) for < GCC 4.3:
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for GCC 4.3 and 4.4:
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=core2 -O2 -mtune=generic -pipe" CXXFLAGS="${CFLAGS}"64 bit profile (amd64) for >= GCC 4.5:
CHOST="x86_64-pc-linux-gnu" CFLAGS="-march=atom -O2 -pipe" CXXFLAGS="${CFLAGS}"原文地址：http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel
