brrip_rp.hh File Reference

Copyright (c) 2018 Inria All rights reserved. More...

#include "base/sat_counter.hh"
#include "mem/cache/replacement_policies/base.hh"

Go to the source code of this file.

Classes
class	BRRIPRP
struct	BRRIPRP::BRRIPReplData
	BRRIP-specific implementation of replacement data. More...

Detailed Description

Copyright (c) 2018 Inria All rights reserved.

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Declaration of a Re-Reference Interval Prediction replacement policy.

Not-Recently Used (NRU) is an approximation of LRU that uses a single bit to determine if an entry is going to be re-referenced in the near or distant future.

Re-Reference Interval Prediction (RRIP) is an extension of NRU that uses a re-reference prediction value to determine if entries are going to be re- used in the near future or not.

The higher the value of the RRPV, the more distant the entry is from its next access.

Bimodal Re-Reference Interval Prediction (BRRIP) is an extension of RRIP that has a probability of not inserting entries as the LRU. This probability is controlled by the bimodal throtle parameter (btp).

From the original paper, this implementation of RRIP is also called Static RRIP (SRRIP), as it always inserts entries with the same RRPV.

Definition in file brrip_rp.hh.