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Review request for Default.


Repository: gem5


Description
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Changeset 10385:10fa6898e94a
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mem: Simple Snoop Filter

This is a first cut at a simple snoop filter that tracks presence of lines in
the caches "above" it. The snoop filter can be applied at any given cache
hierarchy and will then handle the caches above it appropriately; there is no
need to use this only in the last-level bus.

This design currently has some limitations: missing stats, no notion of clean
evictions (these will not update the underlying snoop filter, because they are
not sent from the evicting cache down), no notion of capacity for the snoop
filter and thus no need for invalidations caused by capacity pressure in the
snoop filter. These are planned to be added on top with future change sets.


Diffs
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  src/mem/Bus.py e2c43045a81b 
  src/mem/SConscript e2c43045a81b 
  src/mem/snoop_filter.hh PRE-CREATION 
  src/mem/snoop_filter.cc PRE-CREATION 

Diff: http://reviews.gem5.org/r/2392/diff/


Testing
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Thanks,

Andreas Hansson

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