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Out of memory issue related to SC_MODULE's size


qingwen.ye@gmail.com
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Hi All,
 
Do you have any comments on the issue below?
 
We have a very big SC_MODULE (auto generated), we split it into 28 cpp files. and the SC_CTOR has about 100K lines.
 
We compile the design on a 32GB Linux server, and get out of memory error:
 
cc1plus.exe: out of memory allocating 33554432 bytes
make: *** [obj/ldpc_decoder_core_1.o] Error 1
 
 
thanks,
Qingwen
 
 

 

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Well, your compiler runs out of memory.  As it seems that your host may have enough memory, make sure that the user memory limits (ulimit -v -m) are not getting in your way.

That said, 100k lines in a single function is quite a lot.  We had similar problems with synthesized code at some point in the past and split the results in multiple functions instead.  You might want to split your constructor here by creating a set of "init" functions that are called in sequence and put those functions in separate files as well.

 

Greetings from Oldenburg,
  Philipp

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Hi All,
 
Do you have any comments on the issue below?
 
We have a very big SC_MODULE (auto generated), we split it into 28 cpp files. and the SC_CTOR has about 100K lines.
 
We compile the design on a 32GB Linux server, and get out of memory error:
 
cc1plus.exe: out of memory allocating 33554432 bytes
make: *** [obj/ldpc_decoder_core_1.o] Error 1
 
 
thanks,
Qingwen
 
 

 

 

I am curious, if as you say you are running on a 32 GB Linux

server, your executable is named "cc1plus.exe:" ? Are you

sure it is not a Windows machine ? Why the ".exe" ?

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Hi Philipp,

 

       Thanks for the suggestions, we will try to split the constructors.

 

thanks

 

 

Well, your compiler runs out of memory.  As it seems that your host may have enough memory, make sure that the user memory limits (ulimit -v -m) are not getting in your way.

That said, 100k lines in a single function is quite a lot.  We had similar problems with synthesized code at some point in the past and split the results in multiple functions instead.  You might want to split your constructor here by creating a set of "init" functions that are called in sequence and put those functions in separate files as well.

 

Greetings from Oldenburg,
  Philipp

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