Detect AVX512 on Darwin use GetDarwinSysCtlByName("hw.optional.avx512f")

[zchee]

Detect AVX512 on Darwin use GetDarwinSysCtlByName("hw.optional.avx512f")

On the below CPU, darwin support AVX512 with on-demand.

• https://github.com/apple/darwin-xnu/blob/xnu-7195.81.3/osfmk/i386/fpu.c#L173-L199

arch            : x86
brand           : Intel(R) Xeon(R) W-2150B CPU @ 3.00GHz
family          :   6 (0x06)
model           :  85 (0x55)
stepping        :   4 (0x04)
uarch           : INTEL_SKL
.
.

sysctl result is here:

$ sysctl hw.optional | grep avx512
hw.optional.avx512bw: 1
hw.optional.avx512cd: 1
hw.optional.avx512dq: 1
hw.optional.avx512f: 1
hw.optional.avx512ifma: 0
hw.optional.avx512vbmi: 0
hw.optional.avx512vl: 1

So, detect os_support.have_avx512 to use GetDarwinSysCtlByName("hw.optional.avx512f");, support Intel(R) Xeon AVX512 on Darwin OS.

---

after patched result on the same CPU:

arch            : x86
brand           : Intel(R) Xeon(R) W-2150B CPU @ 3.00GHz
family          :   6 (0x06)
model           :  85 (0x55)
stepping        :   4 (0x04)
uarch           : INTEL_SKL
flags           : aes,avx,avx2,avx512_second_fma,avx512bw,avx512cd,avx512dq,avx512f,avx512vl,bmi1,bmi2,clflushopt,clfsh,clwb,cx16,cx8,dca,erms,f16c,fma3,fpu,hle,mmx,movbe,pclmulqdq,popcnt,rdrnd,rdseed,rtm,smx,ss,sse,sse2,sse3,sse4_1,sse4_2,ssse3,tsc
cache_info      : {"level":1,"cache_type":"data","cache_size":32768,"ways":8,"line_size":64,"tlb_entries":64,"partitioning":1},{"level":1,"cache_type":"instruction","cache_size":32768,"ways":8,"line_size":64,"tlb_entries":64,"partitioning":1},{"level":2,"cache_type":"unified","cache_size":1048576,"ways":16,"line_size":64,"tlb_entries":1024,"partitioning":1},{"level":3,"cache_type":"unified","cache_size":14417920,"ways":11,"line_size":64,"tlb_entries":20480,"partitioning":1}

[zchee]

Why clang-format failed? No diff at lease my local machine.

[zchee]

/cc @natanbc

[natanbc]

Looks like clang-format was moved from the clang package to the clang-extra-tools package on current alpine edge, so the dockerfile needs to be fixed.

[zchee]

@natanbc Should I also fix? if so, send another PR :D

[zchee]

@natanbc send #155

[zchee]

@natanbc @Mizux Rebased. PTAL.

[zchee]

@natanbc @Mizux Sorry, just ping.
If any concerns, I wan to hear that :)

[MayankTahil]

On Mon, Apr 5, 2021 at 11:08 AM Koichi Shiraishi ***@***.***> wrote:yah it’s not d

Detect AVX512 on Darwin use GetDarwinSysCtlByName("hw.optional.avx512f") On the below CPU, darwin support AVX512 with on-demand. - I httpss ://github.com/apple/darwin-xnu/blob/xnu-7195.81.3/osfmk/i386/fpu.c#L173-L199 <https://github.com/apple/darwin-xnu/blob/xnu-7195.81.3/osfmk/i386/fpu.c#L173-L199> arch : x86 brand : Intel(R) Xeon(R) W-2150B CPU @uof until he 3.00GHz family : 6 (0x06) model : 85 (0x55) stepping : 4 (0x04) uarch : INTEL_SKL .. . The So, detect os_support.have_avx512 to use GetDarwinSysCtlByName("hw.optional.avx512f");, support Intel(R) Xeon AVX512 on Darwin OS. ------------------------------ You can view, comment on, or merge this pull request online at: #153 Commit Summary - Detect AVX512 on Darwin use GetDarwinSysCtlByName("hw.optional.avx512f") File Changes - *M* src/cpuinfo_x86.c <https://github.com/google/cpu_features/pull/153/files#diff-48ebb1f03fc6c226c7555d24920f1ab58700afbeeb9b7bb32fefad7a887727c2> (30) Patch Links: - https://github.com/google/cpu_features/pull/153.patch - https://github.com/google/cpu_features/pull/153.diff — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#153>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AE4DSFPNG3BRGZ7MXHAM66LTHH4AHANCNFSM42NGW3RQ> .

-- Cheers! Mayank Tahilramani

[zchee]

@MayankTahil ohh..? what do you mean...?

[zchee]

@gchatelet sorry, just ping 🙇‍♂️

[gchatelet]

Thx @zchee for the PR! My apologies for the late reply.