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  1.  Home
  2. C400-L
  3. June 2004

Porting C Linux to ILE C: Performance problem

Dear collegues,

1. I ported succesfully(?) C coded software from Linux

   to ILE C. 
2. The sample program I use, takes in Linux 1 second.
   The same program run takes on the AS/400 ...
   7 minutes!?
3. When debugging the program on the AS/400, I found
   that the slow response is in the memory allocation
   routines, namely, calloc, malloc, realloc and 
   free().
   CPU usage is about 10%.
4. Those memory management routines are managed by
   linked list which is allocated in the beginning of
   program and free()d before end.

 Is there any reason for that performance problem?

  Please help.

  Regards,

   Zvi   

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