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NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | AUTHORS | LICENSE | SEE ALSO | COLOPHON |
MEMHOG(8) Linux Administrator's Manual MEMHOG(8)
memhog - Allocates memory with policy for testing
memhog [ -r<NUM> ] [ size kmg ] [ policy nodeset ] [ -f<filename> ]
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)
# 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
Andi Kleen (ak@suse.de)
GPL v2
mmap(2), memset(3), numactl(8), numastat(8)
This page is part of the numactl (NUMA commands) project.
Information about the project can be found at
⟨http://oss.sgi.com/projects/libnuma/⟩. If you have a bug report for
this manual page, send it to linux-numa@vger.kernel.org. This page
was obtained from the project's upstream Git repository
⟨https://github.com/numactl/numactl.git⟩ on 2020-08-13. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-06-23.) If you discover any rendering problems in
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of the original manual page), send a mail to man-pages@man7.org
SuSE Labs 2003,2004 MEMHOG(8)