sys_attrs_fta(5) File Formats Manual sys_attrs_fta(5)
NAME
sys_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 separate 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 pro-
cessing. The benefit is that the new thread can run on any other processor, thereby freeing the master processor for other inter-
rupt processing and other tasks. While this may improve overall system performance, there will be an increased latency in the pro-
cessing 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)
SEE ALSO
sys_attrs(5)
sys_attrs_fta(5)
