Re: [Valgrind-users] mpich unable to munmap hugepages

[Philippe W. <phi...@sk...>]

On Mon, 2014-03-31 at 07:23 -0700, janjust wrote:
> Hi,
Hello,

>    I'm trying to run a cray-mpich mpi application under valgrind; however,
> I'm getting an error message from mpich that it cannot unmap/remap huge
> pages.
What error msg do you get ?

> Did anyone encounter this problem before? Any workarounds?
Valgrind significantly increases the memory usage, and manages
the address space itself (and differently from a native run).

Which version of Valgrind are you using on which OS ?
32 or 64 bits ?

I suggest to start valgrind with various tracing options
to see what happens e.g. 
   --trace-syscalls=yes -v -v -v -d -d -d
and observe the traces around the mpich error msg

Philippe