Re: [gentoo-user] Flags for amd 6180se opteron

Thank you both, I knew there was a command.  Did get it working with flags for similar processor but obviously the goal is to optimize for the hardware i have.  Just couldn't remember how you got the cpu flags.  

If you like computers that sound like a pile of angry hair dryers servers are a real bargain, fortunately i can put mine in another room!

"We the People Dare to Create a More Perfect Union" <aclu.org>



Mar 9, 2019, 8:36 AM by corbinbird@×××××××.net:

> According to GCC :
> CPUs based on AMD Family 10h cores with x86-64 instruction set support.
> (This supersets MMX, SSE, SSE2, SSE3, SSE4A, 3DNow!, enhanced 3DNow!,
> ABM and 64-bit instruction set extensions.)
>
>
> Best way to get that info :
> ( simplest way ) cat /proc/cpuinfo
> ( long form ) gcc -c -Q -march=native --help=target
> ( short form ) gcc -### -march=native /usr/include/stdlib.h
>
> partial output of cat /proc/cpuinfo :
> ----
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid
> extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1
> sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic
> cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt
> lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb cpb
> hw_pstate ssbd ibpb vmmcall bmi1 arat npt lbrv svm_lock nrip_save
> tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold
>
> partial output of gcc -### -march=native /usr/include/stdlib.h :
> ----
> "-march=bdver2" -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -msse4a
> -mcx16 -msahf -mno-movbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mlwp
> -mfma -mfma4 -mxop -mbmi -mno-sgx -mno-bmi2 -mno-pconfig -mno-wbnoinvd
> -mtbm -mavx -mno-avx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle
> -mno-rdrnd -mf16c -mno-fsgsbase -mno-rdseed -mprfchw -mno-adx -mfxsr
> -mxsave -mno-xsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd
> -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec -mno-xsaves
> -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma
> -mno-avx512vbmi -mno-avx5124fmaps -mno-avx5124vnniw -mno-clwb
> -mno-mwaitx -mno-clzero -mno-pku -mno-rdpid -mno-gfni -mno-shstk
> -mno-avx512vbmi2 -mno-avx512vnni -mno-vaes -mno-vpclmulqdq
> -mno-avx512bitalg -mno-movdiri -mno-movdir64b --param "l1-cache-size=16"
> --param "l1-cache-line-size=64" --param "l2-cache-size=2048" "-mtune=bdver2"
>
> For CPU_FLAGS_X86 :
> -mmmx means USE FLAG "mmx"
> -msse == sse
> -msse2 == sse2
> ... etc.
>
> Reference Links :
> https://wiki.gentoo.org/wiki/GCC_optimization <https://wiki.gentoo.org/wiki/GCC_optimization>
> https://gcc.gnu.org/onlinedocs/gcc-8.3.0/gcc/x86-Options.html#x86-Options <https://gcc.gnu.org/onlinedocs/gcc-8.3.0/gcc/x86-Options.html#x86-Options>
>
> On 3/9/19 3:51 AM, > mad.scientist.at.large@××××××××.com <mailto:mad.scientist.at.large@××××××××.com>>  wrote:
>
>> can any one suggest flags for the make.conf file, i'm trying to build on
>> an hp dl585 g7 with 4 amd 6180se, 12 core, cpu world says k10
>> microarchetecture, Maranello platform.
>>
>> When this works, I'll be upgrading to 6380 CPUs.  All help appreciated.
>>
>>
>> "We the People Dare to Create a More Perfect Union" <aclu.org>
>>