NAME    [Toc]    [Back]

       sys_attrs_fta - fta subsystem attributes

DESCRIPTION    [Toc]    [Back]

       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 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)

SEE ALSO    [Toc]    [Back]

       sys_attrs(5)



                                                 sys_attrs_fta(5)