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-
- memory <subcommands>
-
- These commands are used for memory allocation.
-
-
- memory freelist
-
- Display the storage allocator free list. Each entry consists of
- a starting segment, in hex, and a size, in decimal bytes.
-
-
- memory ibufsize [<size>]
-
- (B) Display or set the size of the buffers in the interrupt
- buffer pool. The size should be set to the largest type of
- buffer plus a header size of 8. For example: If your ax.25 is
- the only interface and a packet length of 512 is defined, the
- ibufsize should be 512 + 72 + 8 = 592 . The 72 is the ax.25
- header (source , destination, 8 digipeaters, 1 control byte and 1
- pid byte). Default is 600. See also the section on INTERFACE
- BUFFERS (in the JNOS40 CONFIGURATION MANUAL, the relevant section
- is called 'Interface Buffers').
-
- memory minalloc [<bytes>]
-
- Set the minimum number of bytes to allocate per malloc() call.
- Setting a small value (32 or 64) might allow the realloc scheme
- to work more effectively by preventing excessive memory
- fragmentation. Default = 0, no minimum allocation size.
-
-
- memory nibufs [<number>]
-
- (B) Display or set the number of interrupt buffer pool buffers.
- If the number of buffers is set, the statistics in the 'memory
- status' display are reset for number of interrupt buffer fails.
- The minimum available value is set to the requested number of
- buffers. A rule of thumb for the number of buffers is to watch
- the statistics and keep a minimum of 2 free buffers. Increase
- or decrease as required. Default is 10. See also the section on
- INTERFACE BUFFERS (in the JNOS40 CONFIGURATION MANUAL, the relevant
- section is called 'Interface Buffers').
-
-
- memory sizes
-
- Display a histogram of storage allocator requested sizes. Each
- histogram bin is a binary order of magnitude (i.e., a factor of
- 2).
-
-
- memory status
-
- Display a summary of storage allocator statistics.
-
- heap size 52560, avail 12880 (24%), morecores 150, coreleft 5872
-
-
- The first line shows the total size of the internal heap, the
- amount of memory available on the internal heap with the
- percentage of the total heap size, next the number of times
- memory has been requested from the Operating System, and the
- amount of memory the OS has left over.
-
- allocs 16706, frees 16389 (diff 317), alloc fails 0, invalid
- frees 0
-
- Next, the number of times memory has been allocated, and has been
- freed is shown. The difference is the number of buffers
- currently allocated. Alloc fails show up when the system is
- running out of memory resources.
- Invalid frees mean that memory was overwritten, and indicates the
- system is about to lose sanity...
-
- garbage collections yellow 0, red 0
-
- Garbage collections free memory from network control structures
- that could not have otherwise been freed. Yellow garbage
- collections are started when the total available memory, i.e.
- avail+coreleft, becomes smaller then memthresh. Red garbage
- collections indicate that available memory got below memthresh/2
-
- interrupts-off calls to malloc 0, free 0
-
- These indicate calls to the memory allocator with interrupts off.
- These requests are handled using the interrupt buffer pool, which
- is configured by setting memory ibufsize and nibufs.
-
- Intqlen 9 Ibufsize 600 Iminfree 9 Ibuffail 0 Imaxrq 580
-
- This line shows the current number of interrupts buffers in the
- interrupts buffer pool, the size of each buffer, the minimum
- number of free buffers, and a count of times no interrupt buffer
- was available when one was needed. If Iminfree gets close to, or
- becomes zero, you should increase the buffer pool size with the
- 'memory nibuf' command. The statistics are reset when this
- command is executed. Also shown is the size of the largest request
- for an interrupt buffer, to help establish an optimum Ibufsize value.
-
-
- memory thresh [<size>]
-
- (B) Displays or sets the memory threshold size in bytes. If
- free memory gets below this value, no more new connections can be
- started and no new connections will be accepted. This is an
- attempt to preserve the system's sanity.
-
-
-