dtrace discuss - May 2007 - getting a process frequency and percent time on CPU

It looks like DTrace is a powerful tool and I still have a lot
to learn about it.  I want to use DTrace to show me the frequency
with which a given process is switched onto a CPU and the percent
time it has on the CPU.

I am very new to DTrace and have been through several guides that
I found at http://www.sun.com/bigadmin/content/dtrace/ in an effort
to learn enough to accomplish what I want.  The one document
http://developers.sun.com/solaris/articles/power_of_dtrace.html
I found to be quite helpful.  I even downloaded the DTrace tool kit
http://www.brendangregg.com/dtrace.html#DTraceToolkit
and have been trying some of those but still haven''t found what I
need.

I am wondering if it would be sysinfo:::pswitch or sched:::on-cpu
but I haven''t found enough to figure out what to do with either
of them.

Damon Register

> It looks like DTrace is a powerful tool and I still have a lot
> to learn about it.  I want to use DTrace to show me the frequency
> with which a given process is switched onto a CPU and the percent
> time it has on the CPU.
> 
> I am very new to DTrace and have been through several guides that
> I found at http://www.sun.com/bigadmin/content/dtrace/ in an effort
> to learn enough to accomplish what I want.  The one document
> http://developers.sun.com/solaris/articles/power_of_dtrace.html
> I found to be quite helpful.  I even downloaded the DTrace tool kit
> http://www.brendangregg.com/dtrace.html#DTraceToolkit
> and have been trying some of those but still haven''t found what I
> need.
> 
> I am wondering if it would be sysinfo:::pswitch or sched:::on-cpu
> but I haven''t found enough to figure out what to do with either
> of them.
sched::on-cpu/sched::off-cpu seems appropriate for what you are doing.

- akolb