dtrace discuss - Apr 2008 - Newbie help with a dtrace script

I am looking for some help with a dtrace I would like to create.  I am using the
dtrace toolkit and used dappprof to see some of my user functions that are
getting called ALOT.  What I would like to do is to create a dtrace script that
would give me a count of where those functions are being called and get an
aggregate count.  I am just looking for some pointers on how I would go about
staring the script.

Thanks!
Chris


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This message posted from opensolaris.org

Chris Williams wrote:
> I am looking for some help with a dtrace I would like to create.  I am
> using the dtrace toolkit and used dappprof to see some of my user
> functions that are getting called ALOT.  What I would like to do is to
> create a dtrace script that would give me a count of where those
> functions are being called and get an aggregate count.  I am just
> looking for some pointers on how I would go about staring the script.
I suggest you use the documentation to be found on 
http://opensolaris.org/os/community/dtrace/ - for the specific issue, 
something like

pid$::myfunc:entry
{
	@c=count();
}

is probably something you want to explore.

HTH
Michael
-- 
Michael Schuster     http://blogs.sun.com/recursion
Recursion, n.: see ''Recursion''

Chris,
attached is a script I use for memset.
rick

On Sat, Apr 12, 2008 at 06:06:30PM -0700, Chris Williams
wrote:
> Date: Sat, 12 Apr 2008 18:06:30 -0700 (PDT)
> From: Chris Williams <chris_d_williams at yahoo.com>
> Subject: [dtrace-discuss] Newbie help with a dtrace script
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> I am looking for some help with a dtrace I would like to create.  I am
using the dtrace toolkit and used dappprof to see some of my user functions that
are getting called ALOT.  What I would like to do is to create a dtrace script
that would give me a count of where those functions are being called and get an
aggregate count.  I am just looking for some pointers on how I would go about
staring the script.
> 
> Thanks!
> Chris
> 
> 
> --
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 

Rickey C. Weisner 
Software Development and Performance Specialist 
Sun Microsystems, INC
cell phone: 615-308-1147
email: rick.weisner at sun.com
-------------- next part --------------
#!/usr/sbin/dtrace -s

pid$1::memset:entry
/ arg2 < 17 /
{
	this->tval=arg2;
        @[ustack(2),arg2] = count(); 
/*        @[ustack(5),this->tval] = count(); */
/*        @[this->tval] = count(); */
/*        @["memset"] = quantize(arg2); */
}
tick-10sec
{
        printf("\n memset stack, size count Date: %Y ",
walltimestamp);
/*         printf("\n memset size count Date: %Y ", walltimestamp); */
        printa(@);
	clear(@);
}
tick-100sec
{
exit(0);
}