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   memhog    ( 8 )

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Имя (Name)

memhog - Allocates memory with policy for testing

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Синопсис (Synopsis)

memhog [ -r<NUM> ] [ size kmg ] [ policy nodeset ] [ -f<filename>
       ]

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Описание (Description)

memhog mmaps a memory region for a given size and sets the numa
       policy (if specified).  It then updates the memory region for the
       given number of iterations using memset.

       -r<num>    Repeat memset NUM times
       -f<file>   Open file for mmap backing
       -H         Disable transparent hugepages
       -size      Allocation size in bytes, may have case-insensitive order
                  suffix (G=gigabyte, M=megabyte, K=kilobyte)

       Supported numa-policies:

       interleave
              Memory will be allocated using round robin on nodes. When
              memory cannot be allocated on the current interleave,
              target fall back to other nodes.  Multiple nodes may be
              specified.

       membind
              Only  allocate  memory  from  nodes. Allocation will fail
              when there is not enough memory available on these nodes.
              Multiple nodes  may be specified.

       preferred
              Preferably allocate memory on node, but if memory cannot
              be allocated  there  fall  back  to other nodes.  This
              option takes only a single node number.

       default
              Memory will be allocated on the local node (the node the
              thread is running on)

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Примеры (Examples)

# Allocate a 1G region, mmap backed by memhog.mmap file, membind
       to node 0, repeat test 6 times
              memhog -r6 1G --membind 0 -fmemhog.mmap

       # Allocate a 1G region, iterleave across nodes 0,1,2,3, repeat
       test 4 times
              memhog -r4 1G --interleave 0-3

       # Allocate a 1G region, (implicit) default policy, repeat test 8
       times
              memhog -r8 1G

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