Memory release after killing the run

nisha · November 20, 2013, 03:07

I am using OpenFOAM 2.1.x on Ubuntu platform. When a run is 'killed', the RAM still shows as used up. Starting a new run gives an error: 'cannot satisfy memory request' which I assume is due to lack of free space on RAM.

However, when the run 'stops' itself (i.e., solver reaches the prescribed end time), the RAM is released.

Currently, I need to restart the machine to recover the RAM. Any ideas to recover the RAM after 'killing' the run ?

akidess · November 20, 2013, 03:39

How exactly are you "killing" the run?

nisha · November 26, 2013, 23:12

Sorry for delay in my reply.

I am killing the run by following ways:
1. Ctrl + C at teminal
2. Specifying the time to stop at controlDict/stopAt
3. Specifying noWriteNow or writeNow at controlDict/stopAt

All three methods yield same result : memory is shown as used.

akidess · November 27, 2013, 03:38

How do you start the solver? Do the processes still appear in the process list after the interrupt (Ctrl+C)?

nisha · November 27, 2013, 06:17

Starting the solver in parallel mode as:
mpirun -np 12 icoFoam -parallel >& log

The process is killed successfully with Ctrl+C and do not show up in the list.

November 20, 2013, 03:07	Memory release after killing the run	#1
nisha New Member Nisha Join Date: Sep 2009 Location: Massachusetts Posts: 18 Rep Power: 16	I am using OpenFOAM 2.1.x on Ubuntu platform. When a run is 'killed', the RAM still shows as used up. Starting a new run gives an error: 'cannot satisfy memory request' which I assume is due to lack of free space on RAM. However, when the run 'stops' itself (i.e., solver reaches the prescribed end time), the RAM is released. Currently, I need to restart the machine to recover the RAM. Any ideas to recover the RAM after 'killing' the run ?

November 20, 2013, 03:39		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	How exactly are you "killing" the run? __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

November 27, 2013, 03:38		#4
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	How do you start the solver? Do the processes still appear in the process list after the interrupt (Ctrl+C)? __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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November 26, 2013, 23:12		#3
nisha New Member Nisha Join Date: Sep 2009 Location: Massachusetts Posts: 18 Rep Power: 16	Sorry for delay in my reply. I am killing the run by following ways: 1. Ctrl + C at teminal 2. Specifying the time to stop at controlDict/stopAt 3. Specifying noWriteNow or writeNow at controlDict/stopAt All three methods yield same result : memory is shown as used.

November 27, 2013, 06:17		#5
nisha New Member Nisha Join Date: Sep 2009 Location: Massachusetts Posts: 18 Rep Power: 16	Starting the solver in parallel mode as: mpirun -np 12 icoFoam -parallel >& log The process is killed successfully with Ctrl+C and do not show up in the list.