The Free On-line Dictionary of Computing (30 December 2018):

cache conflict

    A sequence of accesses to memory repeatedly
   overwriting the same cache entry.  This can happen if two
   blocks of data, which are mapped to the same set of cache
   locations, are needed simultaneously.

   For example, in the case of a direct mapped cache, if
   arrays A, B, and C map to the same range of cache locations,
   thrashing will occur when the following loop is executed:

   	for (i=1; iping-pong.

   (1997-01-21)