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| author | Daniel <odanrc@yahoo.com.br> | 2019-04-11 08:37:56 +0200 |
|---|---|---|
| committer | Daniel Carvalho <odanrc@yahoo.com.br> | 2019-05-14 07:55:06 +0000 |
| commit | c1bd27907d9404ba0803495d8eb5c9ad8513f09f (patch) | |
| tree | a8447ce260a1a810a53c00eeeea6c42af06f9596 /src/mem/cache/prefetch/Prefetcher.py | |
| parent | 50a533f10134e7bc377dfdb9209b0334fd01cd24 (diff) | |
| download | gem5-c1bd27907d9404ba0803495d8eb5c9ad8513f09f.tar.xz | |
mem-cache: Use SatCounter for prefetchers
Many prefetchers re-implement saturating counters with ints. Make
them use SatCounters instead.
Added missing operators and constructors to SatCounter for that to
be possible and their respective tests.
Change-Id: I36f10c89c27c9b3d1bf461e9ea546920f6ebb888
Signed-off-by: Daniel <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17995
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Javier Bueno Hedo <javier.bueno@metempsy.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Diffstat (limited to 'src/mem/cache/prefetch/Prefetcher.py')
| -rw-r--r-- | src/mem/cache/prefetch/Prefetcher.py | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/mem/cache/prefetch/Prefetcher.py b/src/mem/cache/prefetch/Prefetcher.py index aaa140887..b933b4953 100644 --- a/src/mem/cache/prefetch/Prefetcher.py +++ b/src/mem/cache/prefetch/Prefetcher.py @@ -156,8 +156,8 @@ class IndirectMemoryPrefetcher(QueuedPrefetcher): pt_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), "Replacement policy of the pattern table") max_prefetch_distance = Param.Unsigned(16, "Maximum prefetch distance") - max_indirect_counter_value = Param.Unsigned(8, - "Maximum value of the indirect counter") + num_indirect_counter_bits = Param.Unsigned(3, + "Number of bits of the indirect counter") ipd_table_entries = Param.MemorySize("4", "Number of entries of the Indirect Pattern Detector") ipd_table_assoc = Param.Unsigned(4, @@ -197,7 +197,8 @@ class SignaturePathPrefetcher(QueuedPrefetcher): signature_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), "Replacement policy of the signature table") - max_counter_value = Param.UInt8(7, "Maximum pattern counter value") + num_counter_bits = Param.UInt8(3, + "Number of bits of the saturating counters") pattern_table_entries = Param.MemorySize("4096", "Number of entries of the pattern table") pattern_table_assoc = Param.Unsigned(1, @@ -225,7 +226,7 @@ class SignaturePathPrefetcherV2(SignaturePathPrefetcher): signature_table_assoc = 1 pattern_table_entries = "512" pattern_table_assoc = 1 - max_counter_value = 15 + num_counter_bits = 4 prefetch_confidence_threshold = 0.25 lookahead_confidence_threshold = 0.25 @@ -318,8 +319,8 @@ class IrregularStreamBufferPrefetcher(QueuedPrefetcher): cxx_class = "IrregularStreamBufferPrefetcher" cxx_header = "mem/cache/prefetch/irregular_stream_buffer.hh" - max_counter_value = Param.Unsigned(3, - "Maximum value of the confidence counter") + num_counter_bits = Param.Unsigned(2, + "Number of bits of the confidence counter") chunk_size = Param.Unsigned(256, "Maximum number of addresses in a temporal stream") degree = Param.Unsigned(4, "Number of prefetches to generate") |