FUJITSU Implementation Supplement Fujitsu SPARC64 V - Manual (Page 54)

Release 1.0, 1 July 2002 F. Chapter 8 Memory Models 43
corresponding locations in all instruction caches; references to any instruction cache
cause corresponding modified data to be flushed and corresponding unmodified
data to be invalidated from all data caches. The flush operation is still operative in
SPARC64 V, however.
Since the FLUSH instruction synchronizes the processor, the total latency varies
depending on the situation in SPARC64 V. Assuming all prior instructions are
completed, the latency of
FLUSH is 18 CPU cycles.