jffs2 wear leveling performance test

[Mark]

Hi All:

         I'm a newer to the jffs2 file system.  I want to get some
information about the current jffs2 wear leveling performance. 

         But I don't know whether there're some useful test tools which
shows the static information about flash block erasing times, or do I need
to write such tool by my self?

         Really Thanks.

         

         Mark