If I understand the recon-all script correctly, the default is to run with -openmp 1 and even if you were to instead specify the available -DoParallel option, that would set openmp to 4 threads (and itkthreads to 4) to do work in parallel.   I don't run recon-all with options that increase the number of threads beyond the defaults because it is not cluster friendly.  But even for the default settings, you need ~16G of system RAM to run the Ubuntu 22 OS, freesurfer 7.4.1 running recon-all and whatever other processes run on the machine.

Given that you specified -openmpi 8, i.e., you added 7 more threads with ~16G of physical RAM to spare, then even with memory management it could be a memory underrun occurred causing the process to exit with Signal 6, e.g., memory allocation fails.   You could try and profile machine resource usage by keeping a program like "glances" running on the console and see if reports critical errors in memory usage, CPU load, etc., while recon-all runs.  Maybe try the DoParallel option instead to see if the machine has enough resources to run that.

- R.

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Hi,

I would also like to include here the entire set of lines I am using. Since there are three different parallel-associated flags for recon-all, I am also concerned about my choice (OpenMP).

>> recon-all -i Sub_1_Time_1.nii -subjid Sub_1_Time_1 -qcache -sd ./OUTPUT_DIR -all -openmp 8

>> recon-all -i Sub_1_Time_2.nii -subjid Sub_1_Time_2 -qcache -sd ./OUTPUT_DIR -all -openmp 8

>> recon-all -base ./OUTPUT_DIR/Sub_1_base -tp ./OUTPUT_DIR/Sub_1_Time_1 -tp ./OUTPUT_DIR/Sub_1_Time_2 -sd "./OUTPUT_DIR -all -openmp 8

>> recon-all -long ./OUTPUT_DIR/Sub_1_Time_1 ./OUTPUT_DIR/Sub_1_base -sd ./OUTPUT_DIR -all -openmp 8

>> recon-all -long ./OUTPUT_DIR/Sub_1_Time_2 ./OUTPUT_DIR/Sub_1_base -sd ./OUTPUT_DIR -all -openmp 8

Thank you very much!

Brunno M Campos

University of Campinas

Em qui., 20 de fev. de 2025 às 08:50, Brunno M. de Campos <brunno@unicamp.br> escreveu:

Hi, thanks.

> version of freersurfer you are running: 7.4.1

> OS name and version you are running: Ubuntu 22

> amount of RAM on your machine: 32 gb

Best,

Brunno M Campos
University of Campinas

Em qui., 20 de fev. de 2025 às 08:47, fsbuild <fsbuild@contbay.com> escreveu:

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Please list:

> version of freersurfer you are running

> OS name and version you are running

> amount of RAM on your machine

- R.

On Feb 20, 2025, at 05:58, Brunno M. de Campos <brunno@unicamp.br> wrote:

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Dear all,

I run my script for longitudinal processing based on: individual processing (recon-all -i) + base image creation (recon-all -base) and longitudinal processing (recon-all -long).

In some cases (not always), the process terminates with errors, apparently at the same stage. The log states, among other things, "Reading texture...*** buffer overflow detected ***: terminated Command terminated by signal 6".

1 - I assume that I have exceeded my memory capacity. Am I correct?
I have, in fact, written a script that parallelizes these processes, but I might be distributing the workload poorly if that is the case.

2 - If this is indeed the issue, do you know the peak memory required for such a process?

Thank you!

Brunno M Campos
University of Campinas

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