N_CELLS_MAX

[Hosein Sadeghi]

Hi,

When I run a simulation on linux cluster I get the following error

ERROR: N_CELLS_MAX should be at least   999 for surface SAMPLE (MPI Process:  4, CHID: model_20220906)

while it work fine on local computer with windows. Could you help please?

BR,

Hosien

[Randy McDermott]

Please send a simple input file.

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[Hosein Sadeghi]

Dear Randy,

I made a smaller model but I don't get that error now. Can I send the initial model?

BR

Hosein

[Randy McDermott]

Please simplify you case one step at a time until you figure out where the problem lies.  That is what I would have to do.

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[Kevin McGrattan]

N_CELLS_MAX is the number of nodes used in the solid phase heat conduction routine. Do you have a SURF line with a very thick solid, or a solid that requires more than 1000 internal points?

[Hosein Sadeghi]

the thickness is 3.0E-3. Sorry, I am not sure what do you mean by internal points. Please find attached the file. It crashes at t=3.98s and please see below the error:

BR,

Hosein

[Hosein Sadeghi]

and I use the attached bash file for running.

[Hosein Sadeghi]

[reminder]

Hi, Could you please check this issue?

BR,

Hosein

[Kevin McGrattan]

I see no input file attached.

[Hosein Sadeghi]

It should be available now.

[Kevin]

What version of FDS are you using?

Also, on your linux cluster, post the results of the command

lscpu

[Hosein Sadeghi]

I have compiled the latest version with ompi_gnu_linux

Please see below the output of lscpu:

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   48 bits physical, 48 bits virtual
CPU(s):                          128
On-line CPU(s) list:             0-127
Thread(s) per core:              1
Core(s) per socket:              64
Socket(s):                       2
NUMA node(s):                    2
Vendor ID:                       AuthenticAMD
CPU family:                      23
Model:                           49
Model name:                      AMD EPYC 7702 64-Core Processor
Stepping:                        0
Frequency boost:                 enabled
CPU MHz:                         1800.000
CPU max MHz:                     2183.5930
CPU min MHz:                     1500.0000
BogoMIPS:                        3992.66
Virtualisation:                  AMD-V
L1d cache:                       4 MiB
L1i cache:                       4 MiB
L2 cache:                        64 MiB
L3 cache:                        512 MiB
NUMA node0 CPU(s):               0-63
NUMA node1 CPU(s):               64-127
Vulnerability Itlb multihit:     Not affected
Vulnerability L1tf:              Not affected
Vulnerability Mds:               Not affected
Vulnerability Meltdown:          Not affected
Vulnerability Mmio stale data:   Not affected
Vulnerability Retbleed:          Mitigation; untrained return thunk; SMT disabled
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Retpolines, IBPB conditional, IBRS_FW, STIBP disabled, RSB f
                                 illing
Vulnerability Srbds:             Not affected
Vulnerability Tsx async abort:   Not affected
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 mmxext fxsr_opt pdpe1gb rdtscp l
                                 m constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf ra
                                 pl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes x
                                 save avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a
                                  misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core
                                 perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba
                                  ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed a
                                 dx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cq
                                 m_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru w
                                 bnoinvd amd_ppin arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean f
                                 lushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vg
                                 if v_spec_ctrl umip rdpid overflow_recov succor smca

[Kevin McGrattan]

OK, I will try to do the same and see if I can replicate the error. 

[Hosein Sadeghi]

Thank you.

[Kevin McGrattan]

I ran your case two ways. First, I compiled with the Intel Fortran compiler and Intel MPI library:

 Fire Dynamics Simulator

 Current Date     : October  5, 2022  14:29:24
 Revision         : FDS6.7.9-550-g44843fa-master
 Revision Date    : Mon Oct 3 13:13:15 2022 -0400
 Compiler         : ifort version 2021.7.0
 Compilation Date : Oct 03, 2022 16:55:39

 MPI Enabled;    Number of MPI Processes:      12
 OpenMP Disabled

 MPI version: 3.1
 MPI library version: Intel(R) MPI Library 2021.7 for Linux* OS

Then I compiled with Gnu Fortran and the OpenMPI library.

 Fire Dynamics Simulator

 Current Date     : October  5, 2022  13:13:47
 Revision         : FDS6.7.9-554-gfa138f40d-master
 Revision Date    : Tue Oct 4 09:39:51 2022 -0400
 Compiler         : Gnu gfortran 9.3.1
 Compilation Date : Oct 05, 2022  13:04:36

 MPI Enabled;    Number of MPI Processes:      12
 OpenMP Enabled; Number of OpenMP Threads:      1

 MPI version: 3.1
 MPI library version: Open MPI v4.0.3, package: Open MPI gfo...@blaze.el.nist.gov Distribution, ident: 4.0.3, repo rev: v4.0.3, Mar 03, 2020

Both jobs ran to completion. 

I ran the Intel job under this architecture

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian

CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    2
Core(s) per socket:    16

Socket(s):             2
NUMA node(s):          2

Vendor ID:             GenuineIntel
CPU family:            6
Model:                 106
Model name:            Intel(R) Xeon(R) Gold 6326 CPU @ 2.90GHz
Stepping:              6
CPU MHz:               2900.000
BogoMIPS:              5800.00
Virtualization:        VT-x
L1d cache:             48K
L1i cache:             32K
L2 cache:              1280K
L3 cache:              24576K
NUMA node0 CPU(s):     0-15,32-47
NUMA node1 CPU(s):     16-31,48-63

OpenMPI

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian

CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    4

Socket(s):             2
NUMA node(s):          2

Vendor ID:             GenuineIntel
CPU family:            6
Model:                 44
Model name:            Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz
Stepping:              2
CPU MHz:               1600.000
CPU max MHz:           2401.0000
CPU min MHz:           1600.0000
BogoMIPS:              4799.77
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              12288K
NUMA node0 CPU(s):     0-3
NUMA node1 CPU(s):     4-7

[Hosein Sadeghi]

Thank you so much. So I should check the compilation. 

[Marcos Vanella]

Also, make sure you add this line in your ~/.bashrc environment configuration file:

# Stack memory size limit:
ulimit -s unlimited

log off and back in to have this change. Strange behavior can happen if you overrun the default stack memory.

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[Kevin McGrattan]

Also, try compiling and db (debug) mode and let the code run overnight.

[Hosein Sadeghi]

Thank you for your help.