External Email - Use Caution

OK.  It appears this VM (provided by the FreeSurfer developers) does not include "AVX". That is, "freesurfer_7.2.0_amd64.deb" can't run mri_segment_hypothalamic_subunits without additional setup?  Is it even possible?  If so, can anyone in the FS community provide some simple guidance.  I am not horribly facile with Linux to begin with, but I'd really like to test the hypothal function.

-Randy

developer@developer-VirtualBox:/$ lscpu | grep avxdeveloper@developer-VirtualBox:/$ lscpu | grep avx2developer@developer-VirtualBox:/$ lscpuArchitecture:        x86_64CPU op-mode(s):      32-bit, 64-bitByte Order:          Little EndianCPU(s):              4On-line CPU(s) list: 0-3Thread(s) per core:  1Core(s) per socket:  4Socket(s):           1NUMA node(s):        1Vendor ID:           GenuineIntelCPU family:          6Model:               158Model name:          Intel(R) Core(TM) i7-9700K CPU @ 3.60GHzStepping:            13CPU MHz:             3599.998BogoMIPS:            7199.99Hypervisor vendor:   KVMVirtualization type: fullL1d cache:           32KL1i cache:           32KL2 cache:            256KL3 cache:            12288KNUMA node0 CPU(s):   0-3Flags:               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 rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni ssse3 cx16 pcid sse4_1 sse4_2 hypervisor lahf_lm invpcid_single ibrs_enhanced fsgsbase invpcid md_clear flush_l1d arch_capabilitiesdeveloper@developer-VirtualBox:/$

-----Original Message----- From: fsbuild fsbuild@contbay.com To: freesurfer@nmr.mgh.harvard.edu Cc: daedalus39@aol.com Sent: Fri, Sep 2, 2022 10:12 pm Subject: Re: [Freesurfer] Illegal Instruction (mri_segment_hypothalamic_subunits) - VM 7.2.0

External Email - Use Caution        Hello Randy,The mri_segment_hypothalamic_subunits command is a python script that uses tensorflow which in turn is coded to use AVX instructions.  If the VM host processor does not support AVX instructions, then you will get an illegal instruction error.You can check to see if AVX instructions are supported if this commands shows "avx" or "avx2" in the output (see screenshot for where that is the case). $ lscpu | grep avxIf AVX instructions are supported, then error can also happen if the command is incomplete. - R.

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