memleak(1M) memleak(1M)
memleak - IRIX system memory leak utility
memleak [ namelist ] [-f outfile] [-n sample ]
memleak is a utility that generates a report describing possible memory
leaks in the operating system.
It is intended to be used only by those involved in writing and debugging
device drivers or other parts of the kernel. There are times when zone
memory growth is normal. Someone involved with writing and debugging
kernel or device driver modules will know when the growth is normal.
namelist contains symbol table information needed for symbolic access to
the system memory image being examined. The default namelist is /unix.
-f filename Writes any generated output to filename.
-n sample Sample each zone sample number of times.
-h Prints a usage message.
If no arguments are given, the memleak report is written to /tmp/memleak
with /unix as the namelist and /dev/mem as the memory device. 100 samples
of each memory zone are taken. The memory device must match the
namelist. If a different kernel is used to boot the system (as when using
bootp(1M)), the namelist must be the kernel used to boot with, which
would match the /dev/mem device.
memleak unix.65m -f memoryleaks
memleak
memleak -f outputfile
memleak /unix
memleak /unix -f outputfile -n numberofsamples
All arguments are optional.
EXAMPLE OUTPUT
The following output shows a report where there
is a definite leak in the Sessions structure.
The Sessions structure size is 96 bytes, so
kmem_split_zone was set to 96. There
may also be other memory leaks in the size 64
zones, so kmem_split_zone may be set to 64
Page 1
memleak(1M) memleak(1M)
to make those structures private.
ZONE a800000000cde6c0 may be leaking.
First sample 8 pages, Last sample 47 pages
ZONE NAME SIZE TOTAL FREE PAGES NODE INDEX
======================================================================
a800000000cde6c0 size 64 64 12032 255 47 0 3
ZONE_TYPE = 3 "Heap 64" "mld" "Vsem" "imondata" "xfs_ifork"
"Virtual proce" "pfile" "vpgrp struct" "vsession stru" "Vshm"
"child pids"
ZONE a800000100a202c0 may be leaking.
First sample 4 pages, Last sample 14 pages
ZONE NAME SIZE TOTAL FREE PAGES NODE INDEX
======================================================================
a800000100a202c0 size 64 64 3584 246 14 1 3
ZONE_TYPE = 3 "Heap 64" "mld" "Vsem" "imondata" "xfs_ifork"
"Virtual proce" "pfile" "vpgrp struct" "vsession stru" "Vshm"
"child pids"
ZONE a800000000df9980 may be leaking.
First sample 9 pages, Last sample 82 pages
ZONE NAME SIZE TOTAL FREE PAGES NODE INDEX
======================================================================
a800000000df9980 Sessions 96 13994 106 82 -1 0
ZONE_TYPE = 2
100 samples were taken from 55 zones.
Some samples may fail if there is a shortage of swap space on the system.
The memleak tool was developed to detect possible memory leaks in the
operating system. It should be used in conjunction with detailed
analysis of the subsystems/structures it identifies. At times, heavy
memory usage is normal.
kmem_debug(1M), bootp(1M)
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