What kind of system is this, and what release of Solaris?
Enabling all the probes for all the function entry points in a process
(pid$1:::entry) can take some time, and may make your terminal
window appear hung, but it should not almost hang your system
(unless you did this on a laptop or small, single CPU machine).
If you have thread contention, use the plockstat provider.
Run "plockstat -V ...." and save the output. The "-V"
flag will generate the actual D that plockstat uses (to stderr if
I remember right). You can save that and use it as a building
block for chasing with threads are hitting your contended locks.
Of course, you may find the output of "plockstat -A -p PID" is all you
need...
Thanks,
/jim
[EMAIL PROTECTED] wrote:
> I tried this script (attached below) but it printed only 1 thread (shown
> below). When I tried :::entry and my system was almost hung. I think pstack
> is good enough for my purpose. :-)
>
> BTW any script to find out which two threads are causing lock contention
> /deadlock?
>
> #!/usr/sbin/dtrace -s
> #pragma D option quiet
> #pragma D option defaultargs
>
> pid$1:::entry
> / this->thread_is_already_printed != 1 /
> {
> this->thread_is_already_printed = 1;
> printf("thread %d: \n", tid);
> ustack(50);
> }
>
> $./pstack.d 16028
> thread 11:
>
> libc.so.1`_lwp_mutex_lock
> libc.so.1`_lwp_cond_reltimedwait+0x78
> libc.so.1`_lwp_cond_timedwait+0x1c
> libjvm.so`__1cHMonitorEwait6Mil_i_+0x328
> libjvm.so`__1cIVMThreadDrun6M_v_+0x1b4
> libjvm.so`__1cG_start6Fpv_0_+0x208
> libc.so.1`_lwp_start
>
>
> --- On Fri, 11/14/08, Adam Leventhal <[EMAIL PROTECTED]> wrote:
>
>
>> From: Adam Leventhal <[EMAIL PROTECTED]>
>> Subject: Re: [dtrace-discuss] truss "-fall" equivalent in DTrace
>> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
>> Cc: "Mark Plotnick" <[EMAIL PROTECTED]>, dtrace-discuss@opensolaris.org
>> Date: Friday, November 14, 2008, 7:32 PM
>> On Fri, Nov 14, 2008 at 12:40:55AM -0800,
>> [EMAIL PROTECTED] wrote:
>>
>>> Can I get pstack equivalent script using DTrace?
>>>
>> You can use ustack() at any probe.
>>
>> Adam
>>
>> --
>> Adam Leventhal, Fishworks
>> http://blogs.sun.com/ahl
>>
>
>
>
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss@opensolaris.org
>
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