hello??
  
 I noticed that Valgrind maybe use memory  more than  twice  orignal memory 
that program  need in your guide,
 Now I got a error from valgrind which hint me that I have use more 32G  memory 
on
 64-bit platform, My program orginally use 5G memory ,when I use helgrind to  
analyze
 my program, I found it really used more than 32G memory(use top -p pid to  
see)??
 My answer is that helgrind really need more than 6 times or even more memory 
than before ,is  that true?
 or helgrind have a bug?



By the way ,my program have used  mmap  function.
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