Hi Harald,
Yes i tried other values.
It seems that the value set in the foreseen environment variable is just
ignored.
And always a buffer size of 8kiB is used, which is the default values
for formatted I/O harcoded in libgfortran.
The only way to change this value is editing and recompiling
Hi Denis,
export GFORTRAN_UNFORMATTED_BUFFER_SIZE=1
export GFORTRAN_FORMATTED_BUFFER_SIZE=1
export GFORTRAN_UNBUFFERED_ALL=n
From the output log indeed i got the correct env. variable as i set:
GFORTRAN_FORMATTED_BUFFER_SIZE=1
But from strace output i got always
write(3
Hi Harald
I modified a little your test program to the following:
>>
program fio
integer :: stat
character(80) :: s
integer, parameter:: nx = 256
integer, parameter:: ny = 256
integer, parameter:: nz = 256
i
Hi Tobias,
So i use now in my submission script the option you were quoting i.e
> srun --export=ALL
which is actually the default as stated in the slurm documentation.
Setting the following environment to change the buffer size in both
formatted/unformatted I/O 😎
export GFORTRAN_FORMATTED
