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Ocean distributed processing memory usage

TjaartOpperman
I am using IC6.1.4.500.1 and spectre 7.1.0.031. I am using the paramRun function to do distributed processing on 4 machines in blocking mode using an Ocean script. The paramRun only submits 16 jobs at a time to these 4 machines. When they are complete, the script analyses these waveforms using a for loop and then dumps the results into a text file. The script reads the data using the selectResults function and only writes around 100bytes or so per job. A for loop continuously submits 16 jobs at a time in blocking mode after changing a few variables using the desVar and paramAnalysis statements. The script extracts the waveforms using the famValue function. The spectre.out file shows that each job uses 14.7MB of virtual memory. After a total of 273 Jobs have been submitted the host machine runs out of memory in 32-bit mode. 273*14.7=4013MB. I am expecting the script to use a maximum of 14.7MBX16 of virtual memory at a time, since the variables used to store the waveforms are overwritten. Is there perhaps a way to free up the simulation results from the virtual memory before submitting a new batch of distributed jobs? I am aware that 64-bit mode will provide access to more memory, but in the long run such a solution will not work for me.
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  • TjaartOpperman
    Andrew, As a workaround in IC614 my script now builds another skill script with all the variables set up for a distributed parametric run. I then execute that script from the Virtuoso session by spawning another ocean session in the shell using the sh() command. The memory gets freed this way, but designing the script in this way is a very tedious process. The script also looks quite clumsy and is difficult to read, but it works. Regards, Tjaart
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  • TjaartOpperman
    Andrew, As a workaround in IC614 my script now builds another skill script with all the variables set up for a distributed parametric run. I then execute that script from the Virtuoso session by spawning another ocean session in the shell using the sh() command. The memory gets freed this way, but designing the script in this way is a very tedious process. The script also looks quite clumsy and is difficult to read, but it works. Regards, Tjaart
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