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 avx

developer@developer-VirtualBox:/$ lscpu | grep avx2

developer@developer-VirtualBox:/$ lscpu

Architecture: x86_64

CPU op-mode(s): 32-bit, 64-bit

Byte Order: Little Endian

CPU(s): 4

On-line CPU(s) list: 0-3

Thread(s) per core: 1

Core(s) per socket: 4

Socket(s): 1

NUMA node(s): 1

Vendor ID: GenuineIntel

CPU family: 6

Model: 158

Model name: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz

Stepping: 13

CPU MHz: 3599.998

BogoMIPS: 7199.99

Hypervisor vendor: KVM

Virtualization type: full

L1d cache: 32K

L1i cache: 32K

L2 cache: 256K

L3 cache: 12288K

NUMA node0 CPU(s): 0-3

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 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_capabilities

developer@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 avx

If AVX instructions are supported, then error can also happen if the command is incomplete.

- R.

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