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2019-05-14mem-ruby: Hit latencies defined by the controllersTiago Muck
Removed the icache/dcache hit latency parameters from the Sequencer. They were replaced by the mandatory queue enqueue latency that is now defined by the top-level cache controller. By default, the latency is defined by the mandatory_queue_latency parameter. When the latency depends on specific protocol states or on the request type, the protocol may override the mandatoryQueueLatency function. Change-Id: I72e57a7ea49501ef81dc7f591bef14134274647c Signed-off-by: Tiago Muck <tiago.muck@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18413 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2019-05-14mem-ruby: Do not change blocked msg enqueue infoTiago Muck
Updating the message counter and enqueue times when adding blocked messages back to the queue does not make a lot of sense since these messages are not new arrivals. More importantly, this may lead to starvation. See the scenario below: 1) Request A for a blocked line X arrives 2) A is handled; X is blocked so A is stalled 3) Request B for X arrives; Reponse for X arrives 4) Response is handled; X unblocked; A added back to the request queue 5) B is handled ahead of A (since A's arrival was updated); X may become blocked again If new requests keep comming for X, A may will be stalled forever. Change-Id: Icad79f3f716a870e91cb3455437b8b3c35f130ac Signed-off-by: Tiago Muck <tiago.muck@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18412 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Matthew Poremba <matthew.poremba@amd.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2019-05-12mem-ruby: Replace string parameter in MultiBitSelBloomFilterDaniel R. Carvalho
Replace string parameter from MultiBitSelBloomFilter's constructor by their tokenized counterparts. Change-Id: I2e3db109dc4814fa0e9c13259f1136a6c4083092 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18728 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>
2019-04-28mem: Minimize the use of MemObject.Gabe Black
MemObject doesn't provide anything beyond its base ClockedObject any more, so this change removes it from most inheritance hierarchies. Occasionally MemObject is replaced with SimObject when I was fairly confident that the extra functionality of ClockedObject wasn't needed. Change-Id: Ic014ab61e56402e62548e8c831eb16e26523fdce Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18289 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Maintainer: Gabe Black <gabeblack@google.com>
2019-03-23misc: missing override specifierAndrea Mondelli
Missing specifier of overridden virtual function declared in sim_object.hh Removed redundant "virtual" keyword Change-Id: I42aa3349b537c9e62607bce20cf1b3aabdb99bf2 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17468 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
2019-03-19arch, cpu, dev, gpu, mem, sim, python: start using getPort.Gabe Black
Replace the getMasterPort, getSlavePort, and getEthPort functions with getPort, and remove extraneous mechanisms that are no longer necessary. Change-Id: Iab7e3c02d2f3a0cf33e7e824e18c28646b5bc318 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17040 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2019-03-15mem: Removed circular include refRyan Gambord
If BasicLink.hh is modified, the style checker forces a reordering of the includes, which results in build errors because it ends up including Topology.hh before including its xxxParams.hh files, which include forward declarations of the BasicLink family of classes, and so Topology.hh throws errors that BasicLink etc. are not declared. Change-Id: I664a0652e53f0cc61763c2190a980c655b85d397 Signed-off-by: Ryan Gambord <gambordr@oregonstate.edu> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17270 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2019-02-28ruby: Fix garnet's round robin arbitration for vc selectionSrikant Bharadwaj
Garnet utilizes round robin policy to select a VC for transmission ar Network Interface and Routers. The current logic for round robin is only fair if all the virtual networks are active at a given router. If the router or network interface is not receiving traffic in from any vnet then the priority is always taken up by the next vnet in numerically (or loops back to 0). This fix changes the way we perform round robin arbitration. When a VC is selected in a cycle, the round robin pointer is set to the VC next to it and is iterated from there on. If any VC does not have a flit in a given cycle, it will lose its turn until the next round. At maximum traffic this will model round robin correctly even if a certain VNET is not active at that unit. Change-Id: I9bf805221054f9f25bee14b57ff521f4ce4ca980 Reviewed-on: https://gem5-review.googlesource.com/c/16688 Reviewed-by: Jieming Yin <Jieming.Yin@amd.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2019-02-22python: Make iterator handling Python 3 compatibleAndreas Sandberg
Many functions that used to return lists (e.g., dict.items()) now return iterators and their iterator counterparts (e.g., dict.iteritems()) have been removed. Switch calls to the Python 2.7 iterator methods to use the Python 3 equivalent and add explicit list conversions where necessary. Change-Id: I0c18114955af8f4932d81fb689a0adb939dafaba Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/15992 Reviewed-by: Juha Jäykkä <juha.jaykka@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2019-02-12python: Don't assume SimObjects live in the global namespaceAndreas Sandberg
The importer in Python 3 doesn't like the way we import SimObjects from the global namespace. Convert the existing SimObject declarations to import from m5.objects. As a side-effect, this makes these files consistent with configuration files. Change-Id: I11153502b430822130722839e1fa767b82a027aa Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/15981 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2019-02-12mem-ruby: Fixing TopologyPouya Fotouhi
The constructor assumes the number of nodes (i.e. controllers) equal to the number of external nodes. This is a not necessarily valid for all cases (e.g MESI_Three_Level - where L0s are directly connected to L1s). MachineType_base_number(MachineType_NUM) provides the total number of controllers. Signed-off-by: Pouya Fotouhi <pfotouhi@ucdavis.edu> Change-Id: Id906099dc967ec70aa34dedb0b55351031ff242c Reviewed-on: https://gem5-review.googlesource.com/c/15716 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2019-01-17mem: Determine if a packet queue forces ordering at constructionNikos Nikoleris
A packet queue is typically used to hold on to packets that are schedules to be sent in the future or when they need to queue behind younger packets that have been sent out yet. Due to memory order requirements, some MemObjects need to maintain the order for packet (mostly responses) that reference the same cache block. Prior to this patch the ordering requirements where determined when the packet was scheduled to be sent. This patch moves the parameter to the constructor. Change-Id: Ieb4d94e86bc7514f5036b313ec23ea47dd653164 Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/15555 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> 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>
2018-11-07mem-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>
2018-09-24mem-ruby: Fix a bug in MessageBuffer randomizationXianwei Zhang
In the previous implementation, messages are randomly inserted with delays only if both RubySystem and MessageBuffer randomization flags are set true. However, to find race conditions and cover more slicc transitions, ruby random testers rely on setting RubySystem flag to turn on randomization on all message buffers. As a fix, this patch enables a message buffer to have randomization when either RubySystem or its own flag is set. Change-Id: I1e076908ff07e5846ebad4f4fc1c8f28d40bbfd4 Reviewed-on: https://gem5-review.googlesource.com/12784 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-08-17scons,ruby: do not generate unnecessary filesBrandon Potter
Do not generate garnet tester file or Ruby debug headers without a Ruby protocol (i.e. PROTOCOL=None). It makes no sense to include these files into the build when there will be no protocol to utilize them. Change-Id: I8db4dd532f60008217a10c88a2e089f85df9d104 Reviewed-on: https://gem5-review.googlesource.com/8381 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-08-17ruby: remove unused code inside '#if 0 ... #endif'Brandon Potter
The commented code contains bitrot. It is not clear how to fix the code so remove it. The code will not compile if the preprocessor defines are removed. The llocker and uulocker variables that are used as indices into the persistent_randomize array are undefined. It's not clear what they should be from the current code. 5ab13e2deb shows when the lines were last modified. The functionality contained in the comments probably have not been used since that time. (This is an example of why one should never add commented code that is enabled by removing defines. The code rots and sits in the source forever.) Change-Id: I3e0e7c9afc0b6088130e6f319075809fb6f16e5a Reviewed-on: https://gem5-review.googlesource.com/8481 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-07-23mem: Rename Packet::checkFunctional to trySatisfyFunctionalRobert Kovacsics
Packet::checkFunctional also wrote data to/from the packet depending on if it was read/write, respectively, which the 'check' in the name would suggest otherwise. This renames it to doFunctional, which is more suggestive. It also renames any function called checkFunctional which calls Packet::checkFunctional. These are - Bridge::BridgeMasterPort::checkFunctional - calls Packet::checkFunctional - MSHR::checkFunctional - calls Packet::checkFunctional - MSHR::TargetList::checkFunctional - calls Packet::checkFunctional - Queue<>::checkFunctional (of src/mem/cache/queue.hh, not src/cpu/minor/buffers.h) - Instantiated with Queue<WriteQueueEntry> and Queue<MSHR> - WriteQueueEntry - calls Packet::checkFunctional - WriteQueueEntry::TargetList - calls Packet::checkFunctional - MemDelay::checkFunctional - calls QueuedSlavePort/QueuedMasterPort::checkFunctional - Packet::checkFunctional - PacketQueue::checkFunctional - calls Packet::checkFunctional - QueuedSlavePort::checkFunctional - calls PacketQueue::doFunctional - QueuedMasterPort::checkFunctional - calls PacketQueue::doFunctional - SerialLink::SerialLinkMasterPort::checkFunctional - calls Packet::doFunctional Change-Id: Ieca2579c020c329040da053ba8e25820801b62c5 Reviewed-on: https://gem5-review.googlesource.com/11810 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-12ruby: Fix initial weight in weighted LRUDaniel R. Carvalho
Initial weight was using the timestamp instead of the weight. Change-Id: I61d3c8424f85fd6856957087c477afda111f8ca7 Reviewed-on: https://gem5-review.googlesource.com/10801 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-06-11misc: Using smart pointers for memory RequestsGiacomo Travaglini
This patch is changing the underlying type for RequestPtr from Request* to shared_ptr<Request>. Having memory requests being managed by smart pointers will simplify the code; it will also prevent memory leakage and dangling pointers. Change-Id: I7749af38a11ac8eb4d53d8df1252951e0890fde3 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10996 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-05-16style: fix amd license and style issuesTony Gutierrez
Change-Id: I26136fb49f743c4a597f8021cfd27f78897267b5 Reviewed-on: https://gem5-review.googlesource.com/10463 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-05-03mem-ruby: Consistent dprintf formats for issue outcomesBrad Beckmann
Change-Id: I053fc42f0d5f678f8e3434b53a0f09e00fc3e345 Reviewed-on: https://gem5-review.googlesource.com/10221 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.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>
2018-03-06scons: Switch from the print statement to the print function.Gabe Black
Starting with version 3, scons imposes using the print function instead of the print statement in code it processes. To get things building again, this change moves all python code within gem5 to use the function version. Another change by another author separately made this same change to the site_tools and site_init.py files. Change-Id: I2de7dc3b1be756baad6f60574c47c8b7e80ea3b0 Reviewed-on: https://gem5-review.googlesource.com/8761 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Gabe Black <gabeblack@google.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>
2017-12-15mem-ruby: Support atomic_noncaching acceses in rubySwapnil Haria
Ruby has no support for atomic_noncaching accesses, which prevents using it with kvm-cpu. This patch fixes this by directly forwarding atomic requests from the ruby port/sequencer to the corresponding directory based on the destination address of the packet. Change-Id: I0b4928bfda44fd9e5e48583c51d1ea422800da2d Reviewed-on: https://gem5-review.googlesource.com/5601 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com> Maintainer: Jason Lowe-Power <jason@lowepower.com> Maintainer: Bradford Beckmann <brad.beckmann@amd.com>
2017-12-05mem-ruby: Prevent ruby from crashing on CMOsNikos Nikoleris
Ruby has no support for cache maintenace operations. As a workaround, after printing a warning, we treat them as no-ops in the memory system and respond immediately without handling them. There should be workarounds in the memory system already that allow execution to proceed without the requirement for cache maintenance operations. Change-Id: I125ee4fa37b674c636d87f2d9205bbc1a74da101 Reviewed-on: https://gem5-review.googlesource.com/5057 Reviewed-by: Jieming Yin <bjm419@gmail.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-12-04misc: Rename misc.(hh|cc) to logging.(hh|cc)Gabe Black
These files aren't a collection of miscellaneous stuff, they're the definition of the Logger interface, and a few utility macros for calling into that interface (panic, warn, etc.). Change-Id: I84267ac3f45896a83c0ef027f8f19c5e9a5667d1 Reviewed-on: https://gem5-review.googlesource.com/6226 Reviewed-by: Brandon Potter <Brandon.Potter@amd.com> Maintainer: Gabe Black <gabeblack@google.com>
2017-11-10scons: Move Transform and termcap functionality into their own files.Gabe Black
Change-Id: Ica08e93f3873a7eafd02fe7d44c3bdbf0ce7f6b7 Reviewed-on: https://gem5-review.googlesource.com/5565 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
2017-07-12ruby: Refactor some Event subclasses to lambdasSean Wilson
Change-Id: I9f47a20a869553515a759d9a29c05f6ce4b42d64 Signed-off-by: Sean Wilson <spwilson2@wisc.edu> Reviewed-on: https://gem5-review.googlesource.com/3930 Maintainer: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-06-15mem-garnet: Fix garnet statsJavier Cano-Cano
This patch fix some statistics that in presence of a resetStats instruction were not reseted. This bug makes impossible to obtain reliable network statistics when the simulation doesn't start from tick zero. Change-Id: Ibec45f08d95bf0a533d94b70ec960719206ae945 Maintainer: Tushar Krishna <tushar@ece.gatech.edu> Reviewed-on: https://gem5-review.googlesource.com/3700 Reviewed-by: Jieming Yin <bjm419@gmail.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-06-13ruby: Add support for address ranges in the directoryNikos Nikoleris
Previously the directory covered a flat address range that always started from address 0. This change adds a vector of address ranges with interleaving and hashing that each directory keeps track of and the necessary flexibility to support systems with non continuous memory ranges. Change-Id: I6ea1c629bdf4c5137b7d9c89dbaf6c826adfd977 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2903 Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-05-31ruby: Don't set the block data when a store conditional failsNikos Nikoleris
Previously the Sequencer upon a Store Conditional would unconditionally set the data of the memory location. This change checks and prevents a failed Store Conditional from modifying any data. Change-Id: Id63c9579d8f054f0e95c6d338a7e31aa48762755 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2902 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-03-09ruby: fix MOESI_hammer directory to work with > 3GB memoryLena Olson
The MOESI_hammer directory assumes a contiguous address space, but X86 has an IO gap from 3-4GB. This patch allows the directory to work with more than 3GB of memory on X86. Assumptions: the physical address space (range of possible physical addresses) is 0-XGB when X <= 3GB, and 0-(X+1)GB when X > 3GB. If there is no IO gap this patch should still work. Change-Id: I5453a09e953643cada2c096a91d339a3676f55ee Reviewed-on: https://gem5-review.googlesource.com/2169 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-03-07gpu-compute: Fix Python/C++ object hierarchy discrepanciesAndreas Sandberg
The GPUCoalescer and the Shader classes have different base classes in C++ and Python. This causes subtle bugs in SWIG and compilation errors for PyBind. Change-Id: I1ddd2a8ea43f083470538ddfea891347b21d14d8 Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2228 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr> Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com>
2017-02-12ruby: fix round robin arbiter in garnet2.0Tushar Krishna
The rr arbiter pointer in garnet was getting updated on every request, even if there is no grant. This was leading to a huge variance in wait time at a router at high injection rates. This patch corrects it to update upon a grant.
2016-11-09style: [patch 3/22] reduce include dependencies in some headersBrandon Potter
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
2017-01-19ruby: guard usage of GPUCoalescer code in ProfilerTony Gutierrez
the GPUCoalescer code is used in the ruby profiler regardless of whether or not the coalescer code has been compiled, which can lead to link/run time errors. here we add #ifdefs to guard the usage of GPUCoalescer code. eventually we should refactor this code to use probe points.
2017-01-19ruby: Check MessageBuffer space in garnet NetworkInterfaceMatthew Poremba
Garnet's NetworkInterface does not consider the size of MessageBuffers when ejecting a Message from the network. Add a size check for the MessageBuffer and only enqueue if space is available. If space is not available, the message if placed in a queue and the credit is held. A callback from the MessageBuffer is implemented to wake the NetworkInterface. If there are messages in the stalled queue, they are processed first, in a FIFO manner and if succesfully ejected, the credit is finally sent back upstream. The maximum size of the stall queue is equal to the number of valid VNETs with MessageBuffers attached.
2017-01-19ruby: Add occupancy stats to MessageBuffersMatthew Poremba
This patch is an updated version of /r/3297. "The most important statistic for measuring memory hierarchy performance is throughput, which is affected by independent variables, buffer sizing and communication latency. It is difficult/impossible to debug performance issues through series buffers without knowing which are the bottlenecks. For finite buffers, this patch adds statistics for the average number of messages in the buffer, the occupancy of the buffer slots, and number of message stalls."
2017-01-19ruby: Check all VNETs for injection in garnet NetworkInterfaceMatthew Poremba
The NetworkInterface wakeup currently iterates over all VNETs and breaks the loop if a VNET is unable to allocate a VC. This can cause a deadlock if a lower numbered VNET is unable to allocate a VC while a higher numbered VNET has idle VCs. This seems like a bug as Garnet 1.0 uses a while loop over an if-statement, suggesting the break was intended for this while loop. This patch removes the break statement, which allows up to one message to be dequeued from a VNET and injected into the network.
2016-11-09style: [patch 1/22] use /r/3648/ to reorganize includesBrandon Potter
2016-12-20ruby: Make MessageBuffers actually finite sizedJoel Hestness
When Ruby controllers stall messages in MessageBuffers, the buffer moves those messages off the priority heap and into a per-address stall map. When buffers are finite-sized, the test areNSlotsAvailable() only checks the size of the priority heap, but ignores the stall map, so the map is allowed to grow unbounded if the controller stalls numerous messages. This patch fixes the problem by tracking the stall map size and testing the total number of messages in the buffer appropriately.
2016-12-20ruby: fix typo in DMASequencer::ackCallback()Tony Gutierrez
2016-12-20ruby: fix issue with unused var in DMASequencerTony Gutierrez
the iterator declared in DMASequencer::ackCallback() is only used in an assert, this causes clang to fail when building fast. here we move the find call on the request table directly into the assert.
2016-12-15ruby: Detect garnet network-level deadlock.Jieming Yin
This patch detects garnet network deadlock by monitoring network interfaces. If a network interface continuously fails to allocate virtual channels for a message, a possible deadlock is detected.
2016-12-05ruby: Remove RubyMemoryControl and associated filesAndreas Hansson
This patch removes the deprecated RubyMemoryControl. The DRAMCtrl module should be used instead.
2016-12-02ruby: Fix overflow reported by ASAN in MessageBuffer.Matthew Poremba
In MessageBuffer the m_not_avail_count member is incremented but not used. This causes an overflow reported by ASAN. This patch changes from an int to Stats::Scalar, since the count is useful in debugging finite MessageBuffers.
2016-11-21ruby: Fix potential bugs in garnet2.0Jieming Yin
1. Delete unused variable from struct LinkEntry 2. Correct GarnetExtLink and GarnetIntLink inheritance
2016-11-21ruby: add default ctor for MachineID typeTony Gutierrez
not all uses of MachineID initialize its fields, so here we add a default ctor.
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