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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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