strace Darwin Streaming Server

strace Darwin Streaming Server

I am trying to find out how Darwin Streaming Server (DSS) cooperate with
the OS, and what are the most common system calls made by the DSS. I used
the following commands to attach strace to DSS processes:
ps auxw | grep /usr/local/sbin/DarwinStreaming | awk '{print"-p " $2}' |
xargs strace
However, as shown below, the output of strace is not informative:

I am just wondering if there is any way to figure out what I want.
Thank you in advance,