Only display providers that are at least 0.1% busy.
-c
Enable display of geom(4) consumers too. The default is to show statistics only for geom(4) producers.
-d
Enable display of statistics for delete (BIO_DELETE) operations.
-I interval
Refresh the gstat display every interval microseconds. Adding a suffix of s, ms, or us (the default) indicates that the update interval is specified in seconds, milliseconds, or microseconds, respectively.