job termination: lack of memory. 32bit vs. 64bit problem?
Posted: Tue Sep 28, 2010 2:57 pm
Hi,
Abinit 6.2.3 runs on a up-to-date Fedora system
(32 bits and with kernel 2.6.32-PAE).
The system has 6 GB RAM and 12 GB swap.
When I run the abinit job, it terminates because it cannot allocate
2779.477 Mb (see below for snippet from the log file).
How come this job cannot find 2779.477 MB (= 2.7 GB) ?
The 'top' command tells me that 90 % of the swap is not used
and 2 GB of RAM is free.
Am I facing here the limitation of a 32 bits version of the Linux OS?
If I replace the 32bits OS with its equivalent 64 bits version,
would that help?
My PC has an Intel Core i7 CPU, which effectively shows as 8 CPUs.
Would parallelization with mpi on the localhost do any good to solve
this memory problem?
Thank you!
Rob.
Here is the snippet of the log file:
[...snip...]
=========================================================
P This job should need less than 2779.477 Mbytes of memory.
Rough estimation (10% accuracy) of disk space for files :
WF disk file : -1573.915 Mbytes ; DEN or POT disk file : 9.613 Mbytes.
=========================================================
Biggest array : f_fftgr(disk), with 9.6128 MBytes.
memana : allocated an array of 9.613 Mbytes, for testing purposes.
memana : ERROR -
Test failed to allocate 2779.477 Mbytes
It is not worth to continue
Action : modify input variable to fit the available memory.
or increase limit on available memory.
leave_new : decision taken to exit ...
=========================================================
Abinit 6.2.3 runs on a up-to-date Fedora system
(32 bits and with kernel 2.6.32-PAE).
The system has 6 GB RAM and 12 GB swap.
When I run the abinit job, it terminates because it cannot allocate
2779.477 Mb (see below for snippet from the log file).
How come this job cannot find 2779.477 MB (= 2.7 GB) ?
The 'top' command tells me that 90 % of the swap is not used
and 2 GB of RAM is free.
Am I facing here the limitation of a 32 bits version of the Linux OS?
If I replace the 32bits OS with its equivalent 64 bits version,
would that help?
My PC has an Intel Core i7 CPU, which effectively shows as 8 CPUs.
Would parallelization with mpi on the localhost do any good to solve
this memory problem?
Thank you!
Rob.
Here is the snippet of the log file:
[...snip...]
=========================================================
P This job should need less than 2779.477 Mbytes of memory.
Rough estimation (10% accuracy) of disk space for files :
WF disk file : -1573.915 Mbytes ; DEN or POT disk file : 9.613 Mbytes.
=========================================================
Biggest array : f_fftgr(disk), with 9.6128 MBytes.
memana : allocated an array of 9.613 Mbytes, for testing purposes.
memana : ERROR -
Test failed to allocate 2779.477 Mbytes
It is not worth to continue
Action : modify input variable to fit the available memory.
or increase limit on available memory.
leave_new : decision taken to exit ...
=========================================================