WBINVD
Usage: WBINVD Modifies flags: None
Flushes internal cache, then signals the external cache to write back current data followed by a signal to flush the external cache.
Write Back and Invalidate Cache
WBINVD ; 0F 09 [486]
WBINVD invalidates and empties the processor's internal caches, and causes the processor to instruct external caches to do the same. It writes the contents of the caches back to memory first, so no data is lost.
To flush the caches quickly without bothering to write the data back first, use INVD.
Example:
wbinvd