topic Re: change value of kernel parameter using adb? in Operating System - HP-UX

change value of kernel parameter using adb?

yatin — Mon, 12 Jul 2004 23:59:13 GMT

I am using HP 11.23 on IA-64 machine.How can I change the value of a kernel parameter using adb .Also after reboot this values should be persistent

Re: change value of kernel parameter using adb?

Muthukumar_5 — Tue, 13 Jul 2004 00:13:27 GMT

hai,

ADB is a debugger to be used to debug the object or core or system ( vmunix ) files and variables,etc.

To tune use the kctune command.
[ kctune -d - parameters with description ]

see kctune man page.

Parameter will keep the change from kctune.

Regards,
Muthukumar.

Re: change value of kernel parameter using adb?

Michael Tully — Tue, 13 Jul 2004 00:23:58 GMT

adb is a debugger, no good for regenerating kernel parameters. The below document has what you need.

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5187-2216/5187-2216_top.html&con=/hpux/onlinedocs/5187-2216/00/00/37-con.html&toc=/hpux/onlinedocs/5187-2216/00/00/37-toc.html&searchterms=kernel&queryid=20040712-232153

Re: change value of kernel parameter using adb?

yatin — Tue, 13 Jul 2004 00:24:25 GMT

kctune cannot find the variable how can i use adb

Re: change value of kernel parameter using adb?

yatin — Tue, 13 Jul 2004 00:27:06 GMT

adb can print value of variable but kctune cannot find that variable

Re: change value of kernel parameter using adb?

Muthukumar_5 — Tue, 13 Jul 2004 00:29:00 GMT

we can get the kernel tunnable parameters as
kctune. It will list all the parameters.

kctune
It will give the details of that parameter. We can tune it with your interested value for that variable.

adb can be used only to get the kernel variables and value for that. We can also get it with the kctune.

see kctune man page.

Re: change value of kernel parameter using adb?

Michael Tully — Tue, 13 Jul 2004 00:34:26 GMT

From my IA 64 11.23 system

root@server:/home/tullymi 187 # kctune nflocks
Tunable Value Expression Changes
nflocks 4096 4096 Imm (auto disabled)

root@server:/home/tullymi 188 # kctune nproc
Tunable Value Expression Changes
nproc 30000 30000 Immed

Re: change value of kernel parameter using adb?

Dietmar Konermann — Tue, 13 Jul 2004 04:55:08 GMT

What (obviously internal?) tunable do you plan to change, who proposed that change and why? I would expect that people that recommend such kernel hacking also know how to use adb. ;-)

Best regards...
Dietmar.