topic Re: shared memory in Operating System - HP-UX

shared memory

Alex Lavrov — Thu, 16 Oct 2003 02:11:02 GMT

I have the following tools:
kmeminfo
shminfo
procsize
and glance
how can i fined all the processes who are attached to a single share memory segment ??

I want it to be sorted in this order(by shared memory id).

thnx.

Re: shared memory

Graham Cameron_1 — Thu, 16 Oct 2003 02:24:57 GMT

"ipcs -ma" will give you the info you need.
Sorting by id is a little trickier, as the first 3 lines are header info, and will mess up the sort.
Here's one way:
--
ipcs -am|awk '
(NR <= 3) {print}
(NR >3 ) {print >> "/tmp/ipcs.out"}
END { system ("sort -n -k 3,3 /tmp/ipcs.out && rm /tmp/ipcs.out") }
'
--
see man ipcs
--
Graham

Re: shared memory

Alex Lavrov — Thu, 16 Oct 2003 02:29:49 GMT

I want to see all the processes who are attached to a specific shared memory region.

ipcs -ma show only the shared memory regions their id's and the pid of the creator.

i want to see in a giving time which processes are mapped to this regions

thanx.

Re: shared memory

Graham Cameron_1 — Thu, 16 Oct 2003 02:46:31 GMT

Sorry, I misunderstood (or failed to read!).
ipcs -ma will give you the number of attached processes under the NATTCH col, but I know of no way to list each process.
You could write a C program to do this, using the shmctl() call.
With any luck, someone will have already done this.
Try the porting centre at http://hpux.connect.org.uk/
-- Graham

Re: shared memory

Alex Lavrov — Thu, 16 Oct 2003 03:48:50 GMT

I didnt found such a utilitiy.

if some one know where i can find such a utility it will be great.

thanx.

Re: shared memory

Ravi_8 — Thu, 16 Oct 2003 03:54:39 GMT

Hi,

#ipcs -ma

shows all process attached to shared memory

Re: shared memory

Alex Lavrov — Thu, 16 Oct 2003 03:57:59 GMT

ipcs -ma doesnt show the pids of all the processes that attached to a shared memory region.

Re: shared memory

T G Manikandan — Thu, 16 Oct 2003 04:25:46 GMT

#ipcs -maob

Also you can use shminfo
get it from

ftp://contrib:9unsupp8@hprc.external.hp.com/sysadmin/programs/shminfo/

Re: shared memory

Alex Lavrov — Thu, 16 Oct 2003 05:47:30 GMT

ipcs -maob is not showing me all the processes that attached to a specific region