dtrace discuss - Apr 2007 - Hash Table Constructs?

Does Dtrace support any Hash Table kind of construct to capture single instances
of data? I want to capture some data which can have repetitive values, but I
would like to store single instances. Is there any way to do it in Dtrace?

Thanks,
Neelam
 
 
This message posted from opensolaris.org

Neelam wrote:
> Does Dtrace support any Hash Table kind of construct to 
> capture single instances of data? I want to capture 
> some data which can have repetitive values, but I would 
> like to store single instances. Is there any way to do 
> it in Dtrace?
> 
> Thanks,
> Neelam
>  
I''m not sure if I understood your question correctly, but
either an aggregation or an associative array will allow you
do track occurrences.  For example:

dtrace -n syscall::write:entry''{@a[pid]=count();}''

will print the pid of each process making a write(2) system
call and the number of times it did so while this dtrace
script was left running....

- Bart

-- 
Bart Smaalders			Solaris Kernel Performance
barts at cyber.eng.sun.com		http://blogs.sun.com/barts