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Full Discussion: posix ipc message queue
Operating Systems HP-UX posix ipc message queue Post 302072081 by cadanir on Thursday 27th of April 2006 09:00:33 AM
Old 04-27-2006
Thank you Blowtorch... It seems that all that things are "implementation specific" and related to PA-RISC "strangeley" designed memory management...

man mmap() says that HP-UX may or may not call shmat() to access shared memory... of course this doesn't help me much... and says that the max shareable mem size is 1.75 GBytes. But I still don't know why I cannot go beyond 900 MB... for my posix queues.

The link you give me is related to SYS V style queues not posix queues and is probably not related to our limitations because we have already created more than 200 queues of 256 bytes length and 10 000 or 100 000 messages per queue...

Thank you again...
 

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IPCMK(1)							   User Commands							  IPCMK(1)

NAME
ipcmk - create various ipc resources SYNOPSIS
ipcmk <resource options> [additional options] DESCRIPTION
ipcmk allows you to create shared memory segments, message queues or semaphore arrays. RESOURCE OPTIONS
Resources may be specified as follows: -M, --shmem [size] Shared memory segment of size bytes. -S, --semaphore [number] Semaphore array with number of elements. -Q, --queue Message queue. ADDITIONAL OPTIONS
-p, --mode [mode] Permission for the resource. Default is 0644. -h, --help Display a short help message and exit. -V, --version Output version information and exit. SEE ALSO
ipcrm(1), ipcs(1) AUTHOR
Hayden A. James <hayden.james@gmail.com> AVAILABILITY
The ipcmk command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util- linux/>. util-linux September 2011 IPCMK(1)
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