summaryrefslogtreecommitdiff
path: root/src/mem/cache
AgeCommit message (Collapse)Author
2018-05-17mem-cache: Move reference count stats update to blk invalidationNikos Nikoleris
The tags in the cache keep track of the number of references to the blocks as well as the average number of references between an insertion and the next invalidation. Previously the stats where updated only on block insertion and invalidations were ignored. This changes moves the update of the counters to the block invalidation function. Change-Id: Ie7672c13813ec278a65232694024d2e5e17c4612 Reviewed-on: https://gem5-review.googlesource.com/10428 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-05-17mem-cache: Remove isTouched field from the CacheBlkNikos Nikoleris
At the moment isTouched is used in the warm-up detection mechanism but it keeps track of the same information as isValid(). This change removes it and substitutes its use by isValid(). Change-Id: I611ddf2fa4562ae3b3b2ed2fb74d26abd2e5ec62 Reviewed-on: https://gem5-review.googlesource.com/10427 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-05-17mem-cache: Move replacements stat to the base cache classNikos Nikoleris
Change-Id: I25dbcfcddfe1c422a76eb1af3f726c1360d8d110 Reviewed-on: https://gem5-review.googlesource.com/10426 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-05-17mem-cache: Simplify writeback for the tempBlock in recvTimingRespNikos Nikoleris
When we use the tempBlock to fill-in, we have to write it back and invalidate it at the end of current transaction. This patch simplifies the writeback flow by treating it as a regular writeback. Change-Id: I257be7bbff211e2832ad001a4e991daf67704485 Reviewed-on: https://gem5-review.googlesource.com/10421 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-05-08mem-cache: Create block insertion functionDaniel R. Carvalho
Create a block insertion function to be used when inserting blocks. This resets the number of references to 1 (the insertion is taken into account), sets the insertion tick, and set secure state. Change-Id: Ifc34cbbd1c125207ce47912d188809221c7a157e Reviewed-on: https://gem5-review.googlesource.com/9824 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-05-03mem-cache: Create Second-Chance replacement policyDaniel R. Carvalho
Implementation of a Second-Chance replacement policy. Similar to FIFO, but every block is given a second chance if it has been touched. Change-Id: Id4d52b698d0045a4914a4d848fdf9c3c00a28508 Reviewed-on: https://gem5-review.googlesource.com/9441 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-05-03mem-cache: ReplacementPolicy specific replacement dataDaniel R. Carvalho
Replacement data is specific for each replacement policy, and thus should be instantiated differently by each policy. Touch() and reset() do not need to be aware of CacheBlk, as they only update its ReplacementData. Invalidate() makes replacement policies independent of cache blocks, by removing the awareness of the valid state. An inheritable base ReplaceableEntry class was created to allow usage of replacement policies with any table-like structure. Change-Id: I998917d800fa48504ed95abffa2f1b7bfd68522b Reviewed-on: https://gem5-review.googlesource.com/9421 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-27sim,cpu,mem,arch: Introduced MasterInfo data structureGiacomo Travaglini
With this patch a gem5 System will store more info about its Masters. While it was previously keeping track of the Master name and Master ID only, it is now adding a per-Master pointer to the SimObject related to the Master. This will make it possible for a client to query a System for a Master using either the master's name or the master's pointer. Change-Id: I8b97d328a65cd06f329e2cdd3679451c17d2b8f6 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/9781 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-26mem-cache: Use block iteration in BaseSetAssocDaniel R. Carvalho
Use block iteration instead of numSets and assoc in print(), cleanupRefs() and computeStats(). This makes these functions rely solely on what they are used for: printing and calculating stats of blocks. With the addition of Sectors an extra indirection level is added, and thus these functions would be skipping blocks. Change-Id: I0006f82736cce02ba3e501ffafe9236f748daf32 Reviewed-on: https://gem5-review.googlesource.com/10143 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-19mem-cache: Use findBlock in FALRU's block accessDaniel R. Carvalho
An access must perform a block search, which is done by findBlock. The tagHash is indexed by tags, so use extractTag instead of re- implementing its functionality. Change-Id: Ib5abacbc65cddf0f2d7e4440eb5355b56998a585 Reviewed-on: https://gem5-review.googlesource.com/10082 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-04-19mem-cache: Use secure flag in FALRU's findBlockDaniel R. Carvalho
FALRU's findBlock() must use the secure flag to assure proper functionality. Change-Id: I54e9fbd3c9093b3e8043c4c6c850b74a8f1f5ec0 Reviewed-on: https://gem5-review.googlesource.com/10081 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-18mem-cache: Create NRU Replacement PolicyDaniel R. Carvalho
Implementation of a Not Recently Used replacement policy. Change-Id: I24ab3a6f1db6dcb756b869cfebb5c4bc544170e8 Reviewed-on: https://gem5-review.googlesource.com/9001 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-18mem-cache: Revamp multiple size tracking for FALRU cachesNikos Nikoleris
This change fixes a few bugs and refactors the mechanism by which caches that use the FALRU tags can output statistics for multiple cache sizes ranging from the minimum cache of interest up to the actual configured cache size. Change-Id: Ibea029cf275a8c068c26eceeb06c761fc53aede2 Reviewed-on: https://gem5-review.googlesource.com/9826 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-13mem-cache: Add MoveToTail to FALRUDaniel R. Carvalho
FALRU was missing MoveToTail functionality within its invalidate function, and MoveToHead was doing unnecessary passes when the moved block was the head already. Besides, added some comments to make the code understandable. Change-Id: I2430d82b5d53c88b102a62610ea38b46d6e03a55 Reviewed-on: https://gem5-review.googlesource.com/9541 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-06mem: Remove unused 'using namespace'Daniel R. Carvalho
Removal of unused/barely used 'using namespace' from C++ files. Change-Id: I66dc548c04506db2e41180b9ea7ab5abd7d5375a Reviewed-on: https://gem5-review.googlesource.com/9601 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-06mem-cache: Move insertBlock functionality in FALRUDaniel R. Carvalho
Block insertion is being done in the getCandidates function, while the insertBlock function does not do anything. Besides, BaseTags' stats weren't being updated. Change-Id: Iadab9c1ea61519214f66fa24c4b91c4fc95604c0 Reviewed-on: https://gem5-review.googlesource.com/8882 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-06mem-cache: Create LIP Replacement PolicyDaniel R. Carvalho
Implementation of a LRU Insertion Policy replacement policy. Change-Id: I1a9aa0091ff2cdc1b1652c1d5ec7a3b33fba5b44 Reviewed-on: https://gem5-review.googlesource.com/9002 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-06mem-cache: Create BIP Replacement PolicyDaniel R. Carvalho
Implementation of a Bimodal Insertion Policy replacement policy. Change-Id: Ife058d0d4310dbcb35858348006189f0b2bf7c37 Reviewed-on: https://gem5-review.googlesource.com/9003 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-04-05mem-cache: Use Packet functions to write data blocksDaniel R. Carvalho
Instead of using raw memcpy, use the proper writer functions from the Packet class in Cache. Fixed typos in comments of these functions. Change-Id: I156a00989c6cbaa73763349006a37a18243d6ed4 Reviewed-on: https://gem5-review.googlesource.com/9661 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-30mem-cache: Remove unused return value from the recvTimingReq funcNikos Nikoleris
The recvTimingReq function in the cache always returns true. This changeset removes the return value. Change-Id: I00dddca65ee7224ecfa579ea5195c841dac02972 Reviewed-on: https://gem5-review.googlesource.com/8289 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-03-30mem-cache: Fix FALRU data block seg faultDaniel R. Carvalho
FALRU didn't initialize the blocks' data, causing seg faults. This patch does not make FALRU functional yet. Change-Id: I10cbcf5afc3f8bc357eeb8b7cb46789dec47ba8b Reviewed-on: https://gem5-review.googlesource.com/9302 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-30mem-cache: Create LFU replacement policyDaniel R. Carvalho
Implementation of a Least Frequently Used replacement policy. Change-Id: I772afccd3a7955777e53d59341e922718db44e5c Reviewed-on: https://gem5-review.googlesource.com/8890 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-30mem-cache: Create RRIP Replacement PolicyDaniel R. Carvalho
Implementation of a Re-Reference Interval Prediction replacement policy. Change-Id: Iba716eb5df2bf2be156e765f889d94f6ad00c91b Reviewed-on: https://gem5-review.googlesource.com/8981 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-03-30mem-cache: Create BRRIP replacement policyDaniel R. Carvalho
Implementation of a Bimodal Re-Reference Interval Prediction replacement policy. Change-Id: I25d4a59a60ef7ac496c66852e394fd6cbaf50912 Reviewed-on: https://gem5-review.googlesource.com/8891 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-23mem-cache: fix missing overrides in repl policiesJason Lowe-Power
Change-Id: I67759a4532e8a46c1643d4c3a9c546ad6b565b81 Signed-off-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-on: https://gem5-review.googlesource.com/9321 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-23mem-cache: Create FIFO replacement policyDaniel R. Carvalho
Implementation of a First-In, First-Out replacement policy. Change-Id: Id234ec9d29c092dd4516e609da14b8a75a96b5e4 Reviewed-on: https://gem5-review.googlesource.com/8888 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-23mem-cache: Fix MRU rebaseDaniel R. Carvalho
Rebase of MRU missed a const qualifier, introducing a compilation error. Change-Id: Ia25aa30523613a1a87593a353abe439946656f63 Reviewed-on: https://gem5-review.googlesource.com/9301 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-22mem-cache: Create MRU replacement policyDaniel R. Carvalho
Implementation of a Most Recently Used replacement policy. Change-Id: Id52cb247ca25d4523dcc53490d113695dac6a3f1 Reviewed-on: https://gem5-review.googlesource.com/8889 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-22mem-cache: Split array indexing and replacement policies.Daniel R. Carvalho
Replacement policies (LRU, Random) are currently considered as array indexing methods, but have completely different functionalities: - Array indexers determine the possible locations for block allocation. This information is used to generate replacement candidates when conflicts happen. - Replacement policies determine which of the replacement candidates should be evicted to make room for new allocations. For this reason, they were split into different classes. Advantages: - Easier and more straightforward to implement other replacement policies (RRIP, LFU, ARC, ...) - Allow easier future implementation of cache organization schemes As now we can't assure the use of sets, the previous way to create a true LRU is not viable. Now a timestamp_bits parameter controls how many bits are dedicated for the timestamp, and a true LRU can be achieved through an infinite number of bits (although a few bits suffice in practice). Change-Id: I23750db121f1474d17831137e6ff618beb2b3eda Reviewed-on: https://gem5-review.googlesource.com/8501 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-21mem-cache: Allow clean operations when block allocation failsNikos Nikoleris
Block allocation can fail when there is an in-service MSHR that operates on the victim block. This can happed due to: * an upgrade operation: a request that needs a writable copy of the block finds a shared (non-writable) copy of the block in the cache and has allocates an MSHR for the pending upgrade operation, or * a clean operation: a clean request finds a dirty copy of the block and allocates an MSHR for the pending clean operation. This changes relaxes an assertion to allow for the 2nd case (cache clean operations). Change-Id: Ib51482160b5f2b3702ed744b0eac2029d34bc9d4 Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/9021 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-03-09mem-cache: Use CacheBlk parameter on address regenerationDaniel R. Carvalho
Skewed caches need to know the way to regenerate a block address. Change-Id: I62c61ac9509eff2f37bad36862751956db7a6e40 Reviewed-on: https://gem5-review.googlesource.com/8782 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-08mem-cache: Fix missing overridesJason Lowe-Power
clang doesn't like inconsistent overrides. Add override to all overidden functions in lru.hh Change-Id: I100ff4a7d90757439afee879ff9838c15f5c0b1d Signed-off-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-on: https://gem5-review.googlesource.com/8861 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-07mem-cache: Make the block invalidate functions virtualNikos Nikoleris
This change makes the cache block invalidation function in the BaseTags and CacheBlk class virtual to enable derived classes. Change-Id: I2e64b01c6ca637f16d10474fc8b08eeec3f23453 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8287 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-03-07mem-cache: Make invalidate a common function between tag classesNikos Nikoleris
invalidate was defined as a separate function in the base associative and fully-associative tags classes although both functions should implement identical functionality. This patch moves the invalidate function in the base tags class. Change-Id: I206ee969b00ab9e05873c6d87531474fcd712907 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8286 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-07mem-cache: Allow prefetchers to override setCache.Xiaoyu Ma
This lets them hook setCache, perhaps to set up additional state based on the set cache. Change-Id: Ic3b34fa43d052c71e8ef733a57fe47c70899cd27 Reviewed-on: https://gem5-review.googlesource.com/8701 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-03-06mem-cache: Fix bug generated by 8282Daniel R. Carvalho
Merge 1ae7fced4d32898531a6875a339ef00e43e20e66 generated a bug in tagsInUse calculation. Change-Id: I079e327a0a26a7968f2ed8e433dd6e790c80998b Reviewed-on: https://gem5-review.googlesource.com/8781 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-06mem-cache: Populate whenReady for blocks filled from writebacksNikos Nikoleris
Writebacks write data to either an existing block or a newly allocated block. In either case we need to populate the whenReady field of the block which will determine when the new value can be used. Change-Id: I5788fad0b8086a1be96714639bf6a9470b334926 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8285 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-06mem-cache: Use findBlock() in accessBlock()Daniel R. Carvalho
Use placement policy specific block search within generic access. Change-Id: I6070035e6e00595bcf073d4011f78a55ba7e7a8a Reviewed-on: https://gem5-review.googlesource.com/8721 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-05mem-cache: Remove redundant block initialization on allocationNikos Nikoleris
Change-Id: I7496e12e6a517529316c480d5f6e2ade601f0e2d Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8282 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-02mem-cache: Remove mumBlock redundant initialiation from FALRUNikos Nikoleris
Change-Id: Id3afec0a62446d6d0f44ccb655032343037637e0 Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8281 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-02mem-cache: Populate the secure bit when the temp block is filledNikos Nikoleris
The secure bit should be set when we fill a block with data from a secure location, as indicated by the packet that triggers the fill. This patch fixes a bug in which the cache wouldn't populate the secure bit when filling the temp block. Change-Id: I95c706146449804ff42b205b25dd79750f3e882a Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8284 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-03-02mem-cache: Remove unnecessary block initialization on writebackNikos Nikoleris
Change-Id: Ia9b825bcbb8d326705f74c15a93a88703153ba5a Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8283 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-03-01mem-cache: Remove extra block init in BaseSetAssocDaniel R. Carvalho
Removed extra initialization of cache block just after they have been created and organized the comments. Change-Id: I75c1beaf0489e3e530fd8cbff2739dc7593e3e6f Reviewed-on: https://gem5-review.googlesource.com/8661 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-03-01mem-cache: Vectorize C arrays in BaseSetAssoc.Daniel R. Carvalho
Transform BaseSetAssoc's arrays into C++ vectors to avoid unnecessary resource management. Change-Id: I656f42f29e5f9589eba491b410ca1df5a64f2f34 Reviewed-on: https://gem5-review.googlesource.com/8621 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-02-24mem-cache: Fix CacheSet memory leakDaniel R. Carvalho
CacheSet blocks were being allocated but never freed. Used vector to avoid using pure C array. Change-Id: I6f32fa5a305ff4e1d7602535026c1396764102ed Reviewed-on: https://gem5-review.googlesource.com/8603 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-02-08mem-cache: Make cache warmup percentage a parameter.Daniel R. Carvalho
The warmupPercentage is the percentage of different tags (based on the cache size) that need to be touched in order to warm up the cache. If Warmup failed (i.e., not enough tags were touched), warmup_cycle = 0. The warmup is not being taken into account to calculate the stats (i.e., stats acquisition starts before cache is warmed up). Maybe in the future this functionality should be added. Change-Id: I2b93a99c19fddb99a4c60e6d4293fa355744d05e Reviewed-on: https://gem5-review.googlesource.com/8061 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-02-07mem-cache: Only pendingModified MSHRs can satisfy CMO snoopsNikos Nikoleris
We set the satisfied flag when a cache clean request encounters: 1) a block with the dirty bit set, or 2) a pending modified MSHR which means that the cache will get copy of the block that will be soon modified. This changeset fixes a previous bug that set the satisfied flag on snooping MSHR hits even the pendingModified flags was not set. Change-Id: I4968c4820997be5cc1238148eea12a1ba39837d4 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Sudhanshu Jha <sudhanshu.jha@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7822 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-02-07mem-cache: Cleaned blocks should be marked as not writableNikos Nikoleris
A writeclean packet writes a dirty block to the memory below and therefore sets the dirty flag for the block when the memory below is a cache. If the block was also marked as writable it can satisfy future write requests without further requests/snoops. This can lead to multiple copies of the same block marked as dirty which is not allowed. This changeset clears the writable flag from the cleaned block to prevent the cache from satisfying future write requests without sending a downstream request. Change-Id: I14d3c62fd33f81b1a8ba62374c8565ccab00a6fe Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7821 Maintainer: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-02-06mem-cache: Remove extra numSets zero check.Daniel R. Carvalho
numSets is unsigned, so it cannot be lower than 0. Besides, isPowerOf2(0) is false by definition (and implemmentation*), so there is no need for the double check. * As presented in base/intmath.hh Change-Id: I3f6296694a937434feddc7ed21f11c2a6fdfc5a9 Reviewed-on: https://gem5-review.googlesource.com/7901 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-06mem: Standardize mem folder header guardsDaniel R. Carvalho
Standardize all header guards in the mem directory according to the most frequent patterns. In general they have the form: mem: __FOLDER_TREE_FILE_NAME_HH__ ruby: __FOLDER_TREE_FILENAME_HH__ Change-Id: I983853e292deb302becf151bf0e970057dc24774 Reviewed-on: https://gem5-review.googlesource.com/7881 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 17:48:28 +0000