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2018-12-07mem: Compile tracePacket only when TRACING_ON is definedGiacomo Travaglini
If TRACING_ON is not defined (e.g. when building gem5.fast), clang compilations will fail reporting an unused function. Change-Id: I959dba6e9fcf74b951e16365077939ae4d4ef924 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/14975 Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-12-07mem-cache: Workaround for setWhenReady assertionDaniel R. Carvalho
Change 174da8e2da6a896d2e97bc264f9c827a0f4c35ac added an assert that is not satisfiable with current implementation, breaking some regression tests. Change-Id: Ibafaf0c51906384364f0b2a4b931f8ec6126d858 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14955 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-12-05mem-cache: Remove writebacks parameter from serviceMSHRTargetsDaniel R. Carvalho
Change 8ba77ae8fc98a355082da2bd9fdc6ecf4928f725 introduced the writebacks parameter, but it was never used. Change-Id: I225e5b399de42d77c72fc0012d3dc93ef39b8853 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14896 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-12-04mem-cache: Add getter and setter to CacheBlk::whenReadyDaniel R. Carvalho
Add a getter and a setter function to access CacheBlk::whenReady to encapsulate the variable and allow error checking. This error checking consists on verifying that writes to a block after it has been inserted follow a chronological order. As a side effect, tickInserted retain its value until updated, that is, it is not reset in invalidate(). Change-Id: Idc3c5a99c3f002ee9acc2424f00e554877fd3a69 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14715 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-12-04base, sim: Add missing destructorsNikos Nikoleris
Derived classes with virtual functions need to define a virtual destructor or a protected destructor otherwise calling the base class destructor has undefined behavior. This change adds a virtual distructor in the base class. Change-Id: I1c855aa56dff6585ff99b9147bdb4eb9729a0a53 Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/14815 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-12-03mem-cache: Optimize sector valid and secure checkDaniel R. Carvalho
Previously a loop was being done to check whether the block was valid/secure or not. Variables have been added to skip this loop and save and update sector block state when sub-blocks are validated, invalidated and secured. Change-Id: Ie1734f7dfda9698c7bf22a1fcbfc47ffb9239cea Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14363 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-11-27arch, base, cpu, gpu, mem: Replace assert(0 or false with panic.Gabe Black
Neither assert(0) nor assert(false) give any hint as to why control getting to them is bad, and their more descriptive versions, assert(0 && "description") and assert(false && "description"), jury rig assert to add an error message when the utility function panic() already does that directly with better formatting options. This change replaces that flavor of call to assert with panic, except in the actual code which processes the formatting that panic uses (to avoid infinitely recurring error handling), and in some *.sm files since I don't know what rules those have to follow and don't want to accidentaly break them. Change-Id: I8addfbfaf77eaed94ec8191f2ae4efb477cefdd0 Reviewed-on: https://gem5-review.googlesource.com/c/14636 Reviewed-by: Brandon Potter <Brandon.Potter@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-11-26mem-cache: Add setters to validate and secure blockDaniel R. Carvalho
In order to allow polymorphism of the block these two functions have been added, and all direct status assignments to these bits have been substituted. We also assert that the block has been invalidated before insertion. Then the block is validated in the insertion. Change-Id: Ie7be42408721ad4c2c9dc880f82a62cb594f8668 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14362 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-18mem-cache: a missing cast was truncating addressesJavier Bueno
High bits were truncated when computing the block address Change-Id: Iab2a4c6063ece2d1d4c24ce5686045a6d6d35434 Reviewed-on: https://gem5-review.googlesource.com/c/14415 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-16mem: avoid calling regStat twice on a QoSPolicyMatteo Andreozzi
Change-Id: I216c57073fabe29c3f898a5d89cee41efd4277d5 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/13696 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: fix invalid iterator accessJavier Bueno
An iterator was assigned end() and then it was used to access its corresponding element. Change-Id: I87246cf56cbc694dd6b4e2cabbe84a08429d2ac3 Reviewed-on: https://gem5-review.googlesource.com/c/14361 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Make StridePrefetcher use Replacement PoliciesDaniel
Previously StridePrefetcher was only able to use random replacement policy. This change allows all replacement policies to be applied to the pc table. Change-Id: I8714e71a6a4c9c31fbca49a07a456dcacd3e402c Signed-off-by: Daniel <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14360 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Add invalidation function to StrideEntryDaniel
Add invalidation function to StrideEntry so that every entry can be invalidated appropriately. Change-Id: I38c42b7d7c93d839f797d116f1d2c88572123c0e Signed-off-by: Daniel <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14359 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Make PCTable context independentDaniel
Move the unordered_map outside of the PCTable, as it belongs to the StridePrefetcher. By doing so we are moving towards a table that ressembles the ones of the Tags classes. Some functions have been moved from the prefetcher to the PCTable, as they didn't belong there. As such, they have been renamed to remove the unnecessary prefix. Change-Id: I3e54bc7dee65e1f78d96b0d548ac8345b7bd4364 Signed-off-by: Daniel <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14358 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Vectorize StridePrefetcher's entries.Daniel
Turn StridePrefetcher::PCTable::entries into a vector of vectors. Change-Id: I2a4589a76eb205910c43723638b7989eddd5ca24 Reviewed-on: https://gem5-review.googlesource.com/c/14357 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Return entry in StridePrefetcher::pcTableHit()Daniel
Return a pointer to the entry instead of returning a boolean and passing a pointer reference. As a side effect, change the name of the function to be more descriptive of the functionality. Change-Id: Iad44979e98031754c1d0857b1790c0eaf77e9765 Signed-off-by: Daniel <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14356 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-15mem-cache: Cleanup prefetchersDaniel
Prefetcher code had extra variables, dependencies that could be removed, code duplication, and missing overrides. Change-Id: I6e9fbf67a0bdab7eb591893039e088261f52d31a Signed-off-by: Daniel <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14355 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-14mem-cache: Remove Cache dependency from TagsDaniel R. Carvalho
Tags do not need to be aware of caches. Change-Id: Ib6a082b74dcd9b2f10852651634b59512732fb2a Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/14296 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-14mem-cache: Move access latency calculation to CacheDaniel R. Carvalho
Access latency was not being calculated properly, as it was always assuming that for hits reads take as long as writes, and that parallel accesses would produce the same latency for read and write misses. By moving the calculation to the Cache we can use the write/ read information, reduce latency variables duplication and remove Cache dependency from Tags. The tag lookup latency is still calculated by the Tags. Change-Id: I71bc68fb5c3515b372c3bf002d61b6f048a45540 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13697 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-14mem-cache: implement a probe-based interfaceJavier Bueno
The HW Prefetcher of a cache can now listen events from their associated CPUs and from its own cache. Change-Id: I28aecd8faf8ed44be94464d84485bd1cea2efae3 Reviewed-on: https://gem5-review.googlesource.com/c/14155 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-13mem-cache: Align how we handle requests in atomic with timingNikos Nikoleris
Requests, for which a cache has already committed to respond do not perform any lookups. Previously in atomic mode the packet would pay the lookup latency while in timing it wouldn't. This patch aligns recvAtomic with recvTimingReq and removes the lookup latency from the the handling of such requests. Change-Id: I50a0631f8058e5086d94d55af0e1788a60e2883f Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/14175 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-11-07mem-ruby: Use Packet writing functions instead of memcpyDaniel R. Carvalho
Classes were using memcpy instead of the Packet functions created for writing to/from the packet. This allows these writes to be better checked and tracked. Change-Id: Iae3fba1351330916ee1d4103809c71e151b1639e Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13915 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-05mem-cache: Rename the tag class init function to tagsInit.Gabe Black
Since the tag classes are subclasses of SimObject, they inherit an init function which does generic initialization at simulation startup and which doesn't take any parameters. A new function was added which does take a parameter, and which is just for doing tag specific initialization as triggered by the base cache. These two names clashed, and clang complained that the tag local name was hiding the SimObject name (which it was). Change-Id: I399775aceaf8f1a8e2646d434facef22e6d3e7d0 Reviewed-on: https://gem5-review.googlesource.com/c/13875 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Gabe Black <gabeblack@google.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-05mem: Use Packet writing functions instead of memcpyDaniel R. Carvalho
Classes were using memcpy instead of the Packet functions created for writing to/from the packet. This allows these writes to be better checked and tracked. This also fixes a bug in MemCheckerMonitor, which was using the incorrect type for the packet pointer. Change-Id: I5bbc8a24e59464e8219bb6d54af8209e6d4ee1af Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13695 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-11-05mem-cache: Fix double block invalidationDaniel R. Carvalho
Block was being invalidated twice when not a tempBlock. Make explicit that the else case is only to be applied when handling the tempBlock, as otherwise the Tags should be taking care of the invalidation. Change-Id: Ie7603fdbe156c54e94bbdc83541b55e66f8d250f Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13895 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-26mem-ruby: Fix MOESI_CMP_directory in ports orderNikos Nikoleris
To avoid deadlocks ruby objects typically prioritize the handling of responses to all other events. The order in which in_port statements are written determine the order in which they are handled. This patch fixes the order of in_order statements for the L2 cache in the MOESI_CMP_directory. Change-Id: I62248b0480a88ac2cd945425155f0961a1cf6cb1 Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/13595 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-26arch-arm: We add PRFM PST instruction for armyuetsu.kodama
Note current PRFM supports only PLD, but PST (prefetch for store) is also important for latency hiding. We also bug fix in disassembler to display prfop correctly. Change-Id: I9144e7233900aa2d555e1c1a6a2c2e41d837aa13 Signed-off-by: Yuetsu Kodama <yuetsu.kodama@riken.jp> Reviewed-on: https://gem5-review.googlesource.com/c/13675 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-10-22mem-cache: Move evictBlock(CacheBlk*, PacketList&) to baseDaniel R. Carvalho
Move evictBlock(CacheBlk*, PacketList&) to base cache, as it is both sub-classes implementations are equal. Change-Id: I80fbd16813bfcc4938fb01ed76abe29b3f8b3018 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13656 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-18mem-cache: Fix unused variable warning in FALRU:invalidate()Nikos Nikoleris
Change-Id: I3b902045433ca56b3e62c251158e784b5fa9e4d7 Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/13600 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
2018-10-18mem: Add write coalescing and write-no-allocate to the cachesNikos Nikoleris
Enable the cache to detect contiguous writes and hold on to the MSHR long enough to allow the entire line to be written. If the whole line is written, the MSHR will be sent out as an invalidation requests, as it is part of a whole-line write, i.e. no-fetch-on-write. The cache is also able to switch to a write-no-allocate policy on the actual completion of the writes, and instead use the tempBlock and turn the write operation into a writeback. These policies are all well-known, and described in works such as Jouppi, Cache Write Policies and Performance, vol 21, no 2, ACM, 1993. Change-Id: I19792f2970b3c6798c9b2b493acdd156897284ae Reviewed-on: https://gem5-review.googlesource.com/c/12907 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-18mem: Delay servicing an MSHR after its allocationNikos Nikoleris
An MSHR is allocated and the computed latency determines when the MSHR will be ready and can be serviced by the cache. This patch adds a function that allows changing the time that an MSHR is ready and adjusts the queue such that other MSHRs can be serviced first if they are ready. Change-Id: Ie908191fcb3c2d84d4c6f855c8b1e41ca5881bff Reviewed-on: https://gem5-review.googlesource.com/c/12906 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-18mem: Restructure whole-line writes to simplify write mergingNikos Nikoleris
This patch changes how we deal with whole-line writes their responses. With these changes, we use the MSHR tracking to determine if a whole-line is written, and on a fill we simply handle the invalidation response, with the actual writes taking place as part of satisfying the CPU-side hit. Change-Id: I9a18e41a95db3c20b97f8bca7d95ff33d35a578b Reviewed-on: https://gem5-review.googlesource.com/c/12905 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-18mem: Determine if an MSHR does a whole-line writeNikos Nikoleris
This patch adds support for determining whether the targets in an MSHR are 1) only writes and 2) whether these writes are effectively a whole-line write. This patch adds the necessary functions in the MSHR to allow for write coalescing in the cache. Change-Id: I2c9a9a83d2d9b506a491ba5b0b9ac1054bdb31b4 Reviewed-on: https://gem5-review.googlesource.com/c/12904 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-18mem: Mark the guest endianness packet accessors as deprecated.Gabe Black
Change-Id: Iebefeb5b1ce905f2b45b30b7656d6a01d0724584 Reviewed-on: https://gem5-review.googlesource.com/c/13575 Maintainer: Gabe Black <gabeblack@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-10-18null: Stop specifying an endianness in isa_traits.hh.Gabe Black
The NULL ISA doesn't really have an endianness. Now that the packet accessors which consumed that endianness are gone, we can get rid of that setting as well. Change-Id: I8dd4c7b8236b07df4458fea377865f30141121d4 Reviewed-on: https://gem5-review.googlesource.com/c/13466 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-10-18mem: Explicitly specify the endianness in the abstract memory.Gabe Black
The accessors are used for debugging output. If we're using an ISA where there's an endianness, we use that explicitly, falling back to a binary dump if the size isn't supported. If not, then we just dump the data without interpretation regardless of size. Change-Id: Ib050c4c876ee41f17cfd14ad657150bf6ab1de39 Reviewed-on: https://gem5-review.googlesource.com/c/13464 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-10-13mem-cache: Add missing includes in TreePLRUDaniel
Add missing includes to TreePLRU files. Change-Id: Ia1e7b2aa91eec8a30b6dccf513cca37a3058b350 Reviewed-on: https://gem5-review.googlesource.com/c/13477 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-13mem: Get rid of some stray lines which ended up in packet.hh.Gabe Black
These were left in by mistake when refactoring patches for review. Change-Id: I4c39b5a3e2a2d3957e725a6ffcf48c25b8a69f2e Reviewed-on: https://gem5-review.googlesource.com/c/13495 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-10-12mem: Expose the raw packet accessor functions.Gabe Black
This avoids a place where data has its endianness switched so that when the endianness based accessors switch it back it returns to normal. It also makes it easier to show intent when accessing single bytes where endianness doesn't matter, and there's no contextual endianness. Change-Id: I1b97396c1b9bb39727d35112d90e3969e5fe0aab Reviewed-on: https://gem5-review.googlesource.com/c/13455 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-11mem-cache: Factor ReplaceableEntry outDaniel R. Carvalho
ReplaceableEntry is referenced by many classes that do not necessarily need access to the replacement policies. Therefore, in order to allow better compilation units, we factor it out to a new file. Change-Id: I0823567bf1ca336ffcdf783682ef473e8878d7fd Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13418 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-11mem-cache: Move sector_blks to tags folderDaniel R. Carvalho
Move sector_blks.hh and sector_blks.cc to the tags folder, as its usage scope is restricted to the tags, and caches should not be aware of them. Change-Id: Ia7a71f51ec251d827872daf108c87da543a0ba57 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13417 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-11mem-cache: Rename blk.cc/hh to cache_blk.cc/hhDaniel R. Carvalho
Rename the files blk.cc and blk.hh to cache_blk.cc and cache_blk.hh to comply with the usual file-class naming rules. Change-Id: I8af45df3e4b8dd934fd9929ec914fb230cb2cb09 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13416 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-11mem-cache: Virtualize block printDaniel R. Carvalho
Encapsulate and virtualize block print, so that relevant information can be easily printed anywhere. Change-Id: I91109c29c126755183a0fd2b4446f5335e64076b Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/13415 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-10mem-cache: Create Tree-PLRU replacement policyDaniel R. Carvalho
Implementation of a Tree-PLRU replacement policy. It is based on the assumption that a set associative cache is used. Change-Id: I74b227e88fd6c93aab5bb2cd0e8730376db28f52 Reviewed-on: https://gem5-review.googlesource.com/c/11106 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-10mem-cache: Remove CacheSet.hhDaniel R. Carvalho
Replacement policies aren't aware of cache sets and do not organize blocks based on replacement data. Block search is independent of block placement. Besides, indexing policies have their own way of addressing the sets, therefore there is no need to use this class anymore. BlkType has been removed, as it wasn't being used. Change-Id: Ia79c2a491e59f295c8d60a0466c317eb0e2bdab9 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/9782 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-10-10mem-cache: Split Tags for indexing policiesDaniel R. Carvalho
Split indexing functionality from tags, so that code duplication is reduced when adding new classes that use different indexing policies, such as set associative, skewed associative or other hash-based policies. An indexing policy defines the mapping between an address' set and its physical location. For example, a conventional set assoc cache maps an address to all ways in a set using an immutable function, that is, a set x is always mapped to set x. However, skewed assoc caches map an address to a different set for each way, using a skewing function. FALRU has been left unmodified as it is a specialization with its own complexity. Change-Id: I0838b41663f21eba0aeab7aeb7839e3703ca3324 Reviewed-on: https://gem5-review.googlesource.com/c/8885 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-10mem-cache: Use set and way for ReplaceableEntryDaniel R. Carvalho
Replaceable entries belong to table-like structures, and therefore they should be indexable by combining a row and a column. These, using conventional cache nomenclature translate to sets and ways. Make these entries aware of their sets and ways. The idea is to make indexing policies usable by other table-like structures. In order to do so we move sets and ways to ReplaceableEntry, which will be the common base among table entries. Change-Id: If0e3dacf9ea2f523af9cface067469ccecf82648 Reviewed-on: https://gem5-review.googlesource.com/c/12764 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-10mem-cache: Use possible locations to find blockDaniel R. Carvalho
Use possible locations to find block to make it placement policy independent. Change-Id: I4c9d9e1e1ff91ce12e85ca1970f927d8f4f5a93b Reviewed-on: https://gem5-review.googlesource.com/c/8884 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-10mem-cache: Create tags initialization functionDaniel R. Carvalho
Having the blocks initialized in the constructor makes it harder to apply inheritance in the tags classes. This patch decouples the block initialization functionality from the constructor by using an init() function. It also sets the parent cache. Change-Id: I0da7fdaae492b1177c7cc3bda8639f79921fbbeb Reviewed-on: https://gem5-review.googlesource.com/c/11509 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-10-10mem-cache: Remove Packet dependency in TagsDaniel R. Carvalho
Decouple Tags from Packets, only extracting the necessary functionality for block insertion. As a side effect, create a new function to update common insertion statistics. Change-Id: I5c58f7c17de3255beee531f72a3fd25a30d74c90 Reviewed-on: https://gem5-review.googlesource.com/c/11098 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
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