Dear maintainers,
I have a new Intel NUC 12th generation
https://ark.intel.com/content/www/us/en/ark/products/121613/intel-nuc-12-pro-kit-nuc12wski3.html
under freebsd release 13.2
Running wireshark from ports or from source end with :
[1] 3187 illegal hardware instruction (core dumped) wireshark
After some research and try I think it’s a AVX-512 related trouble.
1 - lldb inside the core just show the same pattern with qt5-core ans SIGILL
2 - Intel physically fused off AVX-512 after non uniformity trouble between
Efficiency and Performance core. https://en.wikipedia.org/wiki/Alder_Lake P
core and E cores have different set of instructions.
“AVX-512 (including FP16) is present but disabled by default to match E-cores.
On early revisions of microprocessors it still can be enabled on some
motherboards with some BIOS versions by disabling the E-cores.[18][19] Intel
has physically fused off AVX-512 on later revisions of Alder Lake CPUs
manufactured in early 2022 and onward.[20][21]”
qt5-core can’t obey to instruction to remove AVX-512. Quick force removing
AVX512 in the source leads to this error :
Incompatible processor. This Qt build requires the following features:
X5^!!
Aborted. Incompatible processor: missing feature 0xc2000000 -X.
[1] 13603 abort (core dumped) wireshark
——————————————————
make config of at5-core :
Checking for AVX512 F instructions... yes
Checking for AVX512 BW instructions... yes
Checking for AVX512 CD instructions... yes
Checking for AVX512 DQ instructions... yes
Checking for AVX512 ER instructions... yes
Checking for AVX512 IFMA instructions... yes
Checking for AVX512 PF instructions... yes
Checking for AVX512 VBMI instructions... yes
Checking for AVX512 VL instructions... yes
[…]
Checking for AVX512 F instructions... yes
Checking for AVX512 BW instructions... yes
Checking for AVX512 CD instructions... yes
Checking for AVX512 DQ instructions... yes
Checking for AVX512 ER instructions... yes
Checking for AVX512 IFMA instructions... yes
Checking for AVX512 PF instructions... yes
Checking for AVX512 VBMI instructions... yes
Checking for AVX512 VL instructions... yes
——————————————————
BUT
————————————————————
llvm-tblgen -version
LLVM (http://llvm.org/):
LLVM version 11.0.1
Optimized build.
Default target: x86_64-unknown-freebsd13.0
Host CPU: goldmont
—————————————————————
goldmont is an old Atom CPU rebranded inside the E-core of the new non uniform
Intel CPU… The E-core is likely to be this old Atom architecture.
—————————————————————
cc -v -x c -E -march=native /dev/null -o /dev/null
FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git
llvmorg-14.0.5-0-gc12386ae247c)
Target: x86_64-unknown-freebsd13.2
Thread model: posix
InstalledDir: /usr/bin
(in-process)
"/usr/bin/cc" -cc1 -triple x86_64-unknown-freebsd13.2 -E -disable-free
-clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name
null -mrelocation-model static -mframe-pointer=all -ffp-contract=on -fno-rounding-math
-mconstructor-aliases -funwind-tables=2 -target-cpu alderlake -target-feature -avx512pf
-target-feature -tsxldtrk -target-feature +cx16 -target-feature +sahf -target-feature
-tbm -target-feature -avx512ifma -target-feature +sha -target-feature +crc32
-target-feature -fma4 -target-feature +vpclmulqdq -target-feature +prfchw -target-feature
+bmi2 -target-feature -cldemote -target-feature +fsgsbase -target-feature +ptwrite
-target-feature -amx-tile -target-feature -uintr -target-feature +gfni -target-feature
+popcnt -target-feature -widekl -target-feature +aes -target-feature -avx512bitalg
-target-feature +movdiri -target-feature +xsaves -target-feature -avx512er
-target-feature +avxvnni -target-feature -avx512fp16 -target-feature -avx512vnni
-target-feature -amx-bf16 -target-feature -avx512vpopcntdq -target-feature -pconfig
-target-feature +clwb -target-feature -avx512f -target-feature +xsavec -target-feature
-clzero -target-feature +pku -target-feature +mmx -target-feature -lwp -target-feature
+rdpid -target-feature -xop -target-feature +rdseed -target-feature +waitpkg
-target-feature -kl -target-feature +movdir64b -target-feature -sse4a -target-feature
-avx512bw -target-feature +clflushopt -target-feature +xsave -target-feature -avx512vbmi2
-target-feature +64bit -target-feature -avx512vl -target-feature +serialize
-target-feature +hreset -target-feature +invpcid -target-feature -avx512cd
-target-feature +avx -target-feature +vaes -target-feature -avx512bf16 -target-feature
+cx8 -target-feature +fma -target-feature -rtm -target-feature +bmi -target-feature
-enqcmd -target-feature +rdrnd -target-feature -mwaitx -target-feature +sse4.1
-target-feature +sse4.2 -target-feature +avx2 -target-feature +fxsr -target-feature
-wbnoinvd -target-feature +sse -target-feature +lzcnt -target-feature +pclmul
-target-feature -prefetchwt1 -target-feature +f16c -target-feature +ssse3 -target-feature
-sgx -target-feature +shstk -target-feature +cmov -target-feature -avx512vbmi
-target-feature -amx-int8 -target-feature +movbe -target-feature -avx512vp2intersect
-target-feature +xsaveopt -target-feature -avx512dq -target-feature +sse2 -target-feature
+adx -target-feature +sse3 -debugger-tuning=gdb -v -fcoverage-compilation-dir=/home/fyr
-resource-dir /usr/lib/clang/14.0.5 -fdebug-compilation-dir=/home/fyr -ferror-limit 19
-fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o
/dev/null -x c /dev/null
clang -cc1 version 14.0.5 based upon LLVM 14.0.5 default target
x86_64-unknown-freebsd13.2
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/clang/14.0.5/include
/usr/include
End of search list.
——————————————————————
=> all AVX512 feature are out from compiler.
confirmed with :
——————————————————————
echo "int foo() { return 0;}" | clang -x c++ - -o - -S -emit-llvm -O2
-march=native
; ModuleID = '-'
source_filename = "-"
target datalayout =
"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-freebsd13.2"
; Function Attrs: mustprogress nofree norecurse nosync nounwind readnone
uwtable willreturn
define dso_local noundef i32 @_Z3foov() local_unnamed_addr #0 {
ret i32 0
}
attributes #0 = { mustprogress nofree norecurse nosync nounwind readnone uwtable willreturn "frame-pointer"="all" "min-legal-vector-width"="0"
"no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="alderlake"
"target-features"="+64bit,+adx,+aes,+avx,+avx2,+avxvnni,+bmi,+bmi2,+clflushopt,+clwb,+cmov,+crc32,+cx16,+cx8,+f16c,+fma,+fsgsbase,+fxsr,+gfni,+hreset,+invpcid,+lzcnt,+mmx,+movbe,+movdir64b,+movdiri,+pclmul,+pku,+popcnt,+prfchw,+ptwrite,+rdpid,+rdrnd,+rdseed,+sahf,+serialize,+sha,+shstk,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+vaes,+vpclmulqdq,+waitpkg,+x87,+xsave,+xsavec,+xsaveopt,+xsaves,-amx-bf16,-amx-int8,-amx-tile,-avx512bf16,-avx512bitalg,-avx512bw,-avx512cd,-avx512dq,-avx512er,-avx512f,-avx512fp16,-avx512ifma,-avx512pf,-avx512vbmi,-avx512vbmi2,-avx512vl,-avx512vnni,-avx512vp2intersect,-avx512vpopcntdq,-cldemote,-clzero,-enqcmd,-fma4,-kl,-lwp,-mwaitx,-pconfig,-prefetchwt1,-rtm,-sgx,-sse4a,-tbm,-tsxldtrk,-uintr,-wbnoinvd,-widekl,-xop"
}
!llvm.module.flags = !{!0, !1, !2}
!llvm.ident = !{!3}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"uwtable", i32 1}
!2 = !{i32 7, !"frame-pointer", i32 2}
!3 = !{!"FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git
llvmorg-14.0.5-0-gc12386ae247c)"}
—————————————————————
—————————————————————
dmesg outpout
CPU: 12th Gen Intel(R) Core(TM) i3-1220P (998.40-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x906a4 Family=0x6 Model=0x9a Stepping=4
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=0x121<LAHF,ABM,Prefetch>
Structured Extended
Features=0x239c27eb<FSGSBASE,TSCADJ,BMI1,AVX2,FDPEXC,SMEP,BMI2,ERMS,INVPCID,NFPUSG,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,PROCTRACE,SHA>
Structured Extended
Features2=0x984007bc<UMIP,PKU,OSPKE,WAITPKG,GFNI,VAES,VPCLMULQDQ,RDPID,MOVDIRI,MOVDIR64B>
Structured Extended
Features3=0xfc18c410<FSRM,MD_CLEAR,IBT,IBPB,STIBP,L1DFL,ARCH_CAP,CORE_CAP,SSBD>
XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
IA32_ARCH_CAPS=0x88fd6b<RDCL_NO,IBRS_ALL,SKIP_L1DFL_VME,MDS_NO,TAA_NO>
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr
TSC: P-state invariant, performance statistics
—————————————————————
So qt5-core includes AVX512 instructions while they are not present in the CPU
(confirmed by wiki, external sources, compiler results and dmesg outpout)
Do you have a solution ? (i tried forced removed of avx512 in source without
succes I suspect others ports with the same problems) Of course it’s OK with my
older 5th generation CPU without AVX512 at all.
Kind regards,
