Is there iotop like command to know thread's I/O usage?

Is there iotop like command for QNX6 to know thread’s I/O usage?

Linux’s iotop command tells you thread’s I/O usage like as follows.

I know QNX6 has fsysinfo utility. But, it can not tell you a relationship between thread and I/O usage.

QNX6: fsysinfo
http://www.qnx.com/developers/docs/6.4.0/neutrino/utilities/f/fsysinfo.html