diff options
author | Anthony Gutierrez <atgutier@umich.edu> | 2014-07-28 12:23:23 -0400 |
---|---|---|
committer | Anthony Gutierrez <atgutier@umich.edu> | 2014-07-28 12:23:23 -0400 |
commit | a628afedade8d7b7cab108a81e714fc2755b4af3 (patch) | |
tree | 82ed5c90e74e3e3e0038e418c1281517ea55f62e /src/mem/cache/tags/Tags.py | |
parent | 0ac462459522771c7836f5f53e82c6a679c256ca (diff) | |
download | gem5-a628afedade8d7b7cab108a81e714fc2755b4af3.tar.xz |
mem: refactor LRU cache tags and add random replacement tags
this patch implements a new tags class that uses a random replacement policy.
these tags prefer to evict invalid blocks first, if none are available a
replacement candidate is chosen at random.
this patch factors out the common code in the LRU class and creates a new
abstract class: the BaseSetAssoc class. any set associative tag class must
implement the functionality related to the actual replacement policy in the
following methods:
accessBlock()
findVictim()
insertBlock()
invalidate()
Diffstat (limited to 'src/mem/cache/tags/Tags.py')
-rw-r--r-- | src/mem/cache/tags/Tags.py | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/mem/cache/tags/Tags.py b/src/mem/cache/tags/Tags.py index 7c0dded32..ab1282ac9 100644 --- a/src/mem/cache/tags/Tags.py +++ b/src/mem/cache/tags/Tags.py @@ -53,14 +53,24 @@ class BaseTags(ClockedObject): hit_latency = Param.Cycles(Parent.hit_latency, "The hit latency for this cache") -class LRU(BaseTags): - type = 'LRU' - cxx_class = 'LRU' - cxx_header = "mem/cache/tags/lru.hh" +class BaseSetAssoc(BaseTags): + type = 'BaseSetAssoc' + abstract = True + cxx_header = "mem/cache/tags/base_set_assoc.hh" assoc = Param.Int(Parent.assoc, "associativity") sequential_access = Param.Bool(Parent.sequential_access, "Whether to access tags and data sequentially") +class LRU(BaseSetAssoc): + type = 'LRU' + cxx_class = 'LRU' + cxx_header = "mem/cache/tags/lru.hh" + +class RandomRepl(BaseSetAssoc): + type = 'RandomRepl' + cxx_class = 'RandomRepl' + cxx_header = "mem/cache/tags/random_repl.hh" + class FALRU(BaseTags): type = 'FALRU' cxx_class = 'FALRU' |