Ioprobe offers observability of process's I/O througput. This Package requires /proc/[pid]/io, so doesn't work in OSX and Windows.
$ ioprobe -h
usage: ioprobe [-h] [--json] pid
I/O probe for process.
positional arguments:
pid target process's pid.
optional arguments:
-h, --help show this help message and exit
--json change command's output to JSON.$ sudo ioprobe [pid]
date rchar/s wchar/s syscr/s syscw/s read_bytes/s write_bytes/s cancelled_write_bytes/s
2015-02-28 00:11:36 0 0 0 0 0 0 0
2015-02-28 00:11:37 0 0 0 0 0 0 0
$ sudo ioprobe --json [pid]
{'write_bytes': 0, 'cancelled_write_bytes': 0, 'read_bytes': 0, 'date': '2015-02-28 00:12:15', 'syscr': 0, 'wchar': 0, 'rchar': 0, 'syscw': 0}
{'write_bytes': 0, 'cancelled_write_bytes': 0, 'read_bytes': 0, 'date': '2015-02-28 00:12:16', 'syscr': 0, 'wchar': 0, 'rchar': 0, 'syscw': 0}