Checking CPU capabilities

[Arthur Chance]

On 02/02/2019 17:14, Mayuresh Kathe wrote:
> I am not on a FreeBSD system at the moment, and don't have access to one
> either.
> 
> On 2019-02-02 10:26 PM, Herbert Laubner wrote:
>> You could try
>>
>> $ grep Features /var/run/dmesg.boot  | grep --colour -e AVX
>>
>> Am 02.02.19 um 22:09 schrieb Mayuresh Kathe:
>>> On 2019-02-02 09:46 PM, Chris Hill wrote:
>>>> On Sat, 2 Feb 2019, Mayuresh Kathe wrote:
>>>>
>>>>> Under Linux it is `cat /proc/cpuinfo`
>>>>> Under Solaris it is `isainfo -v`
>>>>> What is it under FreeBSD 12?
>>>>
>>>> Something like
>>>>   $ grep Features /var/run/dmesg.boot
>>>> ...or am I missing something?
>>>
>>> I need to know if my processor supports AVX, AVX2, AVX-512, SIMD, etc.
>>> Would your approach give me that sort of information?
>>>

As an example, here's what happens on my desktop machine, which is an
Intel i7-4790K

root at arthur:5# grep Features /var/run/dmesg.boot
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x7ffafbbf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x21<LAHF,ABM>
  Structured Extended
Features=0x2fbb<FSGSBASE,TSCADJ,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,NFPUSG>
  XSAVE Features=0x1<XSAVEOPT>



-- 
Always learn from the mistakes of others, because you won't live long
enough to learn from making all possible mistakes yourself.