These stats were changed by this CL:
commit a4b546c3a1
Author: Matthew Poremba <matthew.poremba@amd.com>
Date: Thu Jan 19 11:58:59 2017 -0500
ruby: Add occupancy stats to MessageBuffers
Change-Id: I9713ed44d94cba424cdfa92d746dfe8007583b40
Reviewed-on: https://gem5-review.googlesource.com/2649
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>