Capture states of all processes at the same time

[Maninya M]

Thank you,

I tried doing it the first way. I configured the kernel to include DDB,
then typed on the console:

sysctl debug.kdb.enter=1

to enter DDB.

Then typed this to force a panic:

sysctl debug.kdb.panic=1

The computer just hung after this, and after waiting for a while I pressed
the reboot button.
It said "no core dumps found" while rebooting.

I couldn't find any core dumps in /var/crash either.

So I tried again to enter DDB, typed sysctl debug.kdb.enter=1. Now the
computer hangs even for this (tried it twice)!

What did I do wrong? Please help me with the steps.








On 14 March 2012 22:49, Artem Belevich <art at freebsd.org> wrote:

> On Wed, Mar 14, 2012 at 9:31 AM, Maninya M <maninya at gmail.com> wrote:
> > How can I capture the states of all running processes at a particular
> point
> > in time? How can I retrieve this information for later use?
>
> Go into DDB. Do 'panic'. wait for the kernel to finish dumping core.
> Once system reboots and saves kernel core, examine process state in
> the core file with gdb. Obviously it's a postmortem examination which
> may not be exactly what you want.
>
> Less destructive option would be to do 'ps' or 'show threads' in DDB,
> save its output and then continue.
>
> --Artem
>



-- 
Maninya



-- 
Maninya