On Tue, Jun 06, 2006 at 07:37:27PM -0700, Pavan Reddy wrote:
> Hi All,
> I am trying to debug a conditional variable at this situation:
>
> I have a daemon running and I am trying to send a signal to it thru
> cv_signal()
> controlled by a conditional variable. The first request I sent to it works
> fine
> and when it comes to the second request, I am not able to wake that daemon
> with cv_signal(). I am guessing that there is some problem with the
> conditional
> variable and trying to debug that. I can see the daemon kernel thread
> running.
>
>
> There is a structure with a conditional variable
>
> struct a {
> int ...;
> ...
> ...
> kcondvar_t something;
> };
>
> suppose if the address of "struct a" after allocation is 100 and the address
> of
> conditional variable is 120.
>
> Questions:
>
> 1. If I do a "::wchaninfo", should that list the address of the conditional
> variable
> as 120?
>
> 2. ::wchaninfo ==> dump condition variable
> Does this dumps all the conditional variable addressess which are active at
> that point
> time?
You might look at dtrace for this; sched:::sleep will fire when a thread
sleeps on a condvar, and sched:::wakeup will fire when one thread wakes
another.
Cheers,
- jonathan
--
Jonathan Adams, Solaris Kernel Development
