sys_attrs_fta - fta subsystem attributes
The fta (fta) kernel subsystem is used by the Fiber Distributed Data Inter-
face (FDDI) adapters. Refer to the sys_attrs(5) reference page for an
introduction to the topic of kernel subsystem attributes.
A value that enables (1) or disables (0) the awakening of a separate
thread to handle interrupt service work.
The processing of received frames or of completed transmits is typi-
cally performed by the driver's interrupt service routine. If
minimal_isr is enabled, the interrupt service routine does not do the
processing. Instead, it awakens another thread to do the processing.
The benefit is that the new thread can run on any other processor,
thereby freeing the master processor for other interrupt processing and
other tasks. While this may improve overall system performance, there
will be an increased latency in the processing of received FDDI frames.
If minimal_isr is disabled, the interrupt service routine processes all
received frames and completed transmits. This can delay the master
processor from servicing other I/O interrupts and can lead to overall
system performance degradation. However, the latency for handling
received FDDI frames will be very low.
Default value: 1 (enabled)