determine single thread used while backup running

Hi,

I would like to know about  cpu thread using on T5120

in the following output, i run dd command to backup for example  one metadevice/d380, let me know whether dd/1 is the single thread while backup is performed.

run the script :

+ dd if=/dev/md/ecc-ds/dsk/d380 of=/dev/rmt/0 bs=8192k obs=8192k

observe using prstat :

PID USERNAME  SIZE   RSS STATE  PRI NICE	TIME  CPU PROCESS/NLWP
12207 root	14M   13M sleep   60	0   0:00:00 0.1% dd/1

Thank you for your help

Thanks

Jodi