sys_attrs_fta(5)sys_attrs_fta(5)NAMEsys_attrs_fta - fta subsystem attributes
DESCRIPTION
The fta (fta) kernel subsystem is used by the Fiber Distributed Data
Interface (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 sep‐
arate thread to handle interrupt service work.
The processing of received frames or of completed transmits is
typically 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 pro‐
cesses 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. How‐
ever, the latency for handling received FDDI frames will be very
low.
Default value: 1 (enabled)
SEE ALSOsys_attrs(5)sys_attrs_fta(5)
