[FLASH-USERS] Question about grid size

[Jenks, Malia T.]

Hmm, somehow Flash is statically allocating more than the Linux 2GB limit. I'm surprised that anything is statically allocated.


I did a parallel compile but assuming (for debugging purposes) that I would just use 1 CPU. Thus, I set iProcs =1

jProcs=1  and


setup -2d +cylindrical +usm -nxb=512 -nyb=512 -auto


Then at link time I get:


Burn.o: In function `burn':
/home/mjenks/FLASH4.4/object/Burn.F90:107:(.text+0xe3): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_useburn_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:115:(.text+0x2ad): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_useshockburn_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:145:(.text+0x604): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_useshockburn_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:172:(.text+0x897): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_nucleartempmin_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:175:(.text+0x8bc): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_nucleartempmax_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:174:(.text+0x8dc): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_useshockburn_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:173:(.text+0x8f1): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_nucleardensmin_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:173:(.text+0x8f9): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_nucleardensmax_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn.F90:181:(.text+0x961): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_nuclearni56max_' defined in COMMON section in Burn_data.o
Burn_computeDt.o: In function `burn_computedt':
/home/mjenks/FLASH4.4/object/Burn_computeDt.F90:108:(.text+0x16): relocation truncated to fit: R_X86_64_PC32 against symbol `burn_data_mp_bn_useburn_' defined in COMMON section in Burn_data.o
/home/mjenks/FLASH4.4/object/Burn_computeDt.F90:141:(.text+0x69): additional relocation overflows omitted from the output
make: *** [flash4] Error 1

which means that I have > 2GB of static data see https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/268374

which shouldn't be happening.

Ideas?

Malia
relocation truncated to fit: R_X86_64_PC32 - Intel® Software<https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/268374>
software.intel.com
Hi, I'm trying to compile a big code that so far has been running fine.Now, we have surpassed the 2GB in statically allocated data limit. I knew that would bring us ...




________________________________
From: Jenks, Malia T.
Sent: Tuesday, May 23, 2017 4:29:17 PM
To: flash-users at flash.uchicago.edu
Subject: Question about grid size


I tried to increase the number of cells in my 2d model to 512 by 512. It will not compile at this size and I get an error about static memory. Is there a way I can solve this?


Malia Jenks
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