topic Re: running kernel, parametres in Operating System - HP-UX

running kernel, parametres

CPHVF-U Guard — Wed, 12 Dec 2001 10:11:15 GMT

Hi.
I want the value of "semmap" and "sema" in the running kernel. How do I get it?

kmtune -q maxusers : 400
kmtune -q nproc : ((10*maxusers)/3)+128 = 1461
kmtune -q semmni : (NPROC*2) = 2922

kmtune -q semmap : (SEMMNI+2) = 2924
sysdef | grep semmap : 191430656

kmtune -q sema : 1
sysdef | grep sema : 0

Which command should I use?

Re: running kernel, parametres

Rainer von Bongartz — Wed, 12 Dec 2001 10:23:48 GMT

sysdef is an 'old' 10.20 tool.

you should use kmtune as the manual says:

sysdef will not be supported in
the future releases of HP-UX. So users are advised to use kmtune(1M)
utility which provides additional information on kernel tunable

Regards
Rainer

Re: running kernel, parametres

Praveen Bezawada — Wed, 12 Dec 2001 10:26:41 GMT

Hi
Use kmtune or adb or use SAM. We earlier got wrong values from sysdef

...BPK...

Re: running kernel, parametres

T. M. Louah — Wed, 12 Dec 2001 10:30:19 GMT

Moreover, you can always try this command to check for Kernel params values:
#more /stand/build/tune.h |grep -i semmap

Re: running kernel, parametres

Praveen Bezawada — Wed, 12 Dec 2001 10:33:21 GMT

you can use adb as

`echo "physmem/D" | adb /stand/vmunix /dev/kmem

Re: running kernel, parametres

CPHVF-U Guard — Wed, 12 Dec 2001 10:42:25 GMT

I were to fast ....

# echo "semmap/D" | adb /stand/vmunix /dev/kmem
Error from elf64_getehdr(application core file)
Not an Elf file: No Elf header
semmap:
semmap: 191430656

#echo "sema/D" | adb /stand/vmunix /dev/kmem
Error from elf64_getehdr(application core file)
Not an Elf file: No Elf header
sema:
sema: 0

If these values are correct, then I can't trust kmtune, or?
The values match sysdef.
(By the way, it is HP-UX 11.00)

Re: running kernel, parametres

Praveen Bezawada — Wed, 12 Dec 2001 12:56:11 GMT

Hi
Sorry i missed -k , the command is
`echo "physmem/D" | adb -k /stand/vmunix /dev/kmem