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2015-09-04mem: Tidy up the snoop state-transition logicAndreas Hansson
Remove broken and unused option to pass dirty data on non-exclusive snoops. Also beef up the comments a bit.
2015-09-04sim: Fix time unit in abort messageAndreas Hansson
2015-09-02sim: tag-based checkpoint versioningCurtis Dunham
This commit addresses gem5 checkpoints' linear versioning bottleneck. Since development is distributed across many private trees, there exists a sort of 'race' for checkpoint version numbers: internally a checkpoint version may be used but then resynchronizing with the external tree causes a conflict on that version. This change replaces the linear version number with a set of unique strings called tags. Now the only conflicts that can arise are of tag names, where collisions are much easier to avoid. The checkpoint upgrader (util/cpt_upgrader.py) upgrades the version representation, as one would expect. Each tag version implements its upgrader code in a python file in the util/cpt_upgraders directory rather than adding a function to the upgrader script itself. The version tags are stored in the 'Globals' section rather than 'root' (as the version was previously) because 'Globals' gets unserialized first and can provide a warning before any other unserialization errors can occur.
2015-09-02sim: support checkpointing std::set<std::string>'sCurtis Dunham
This is in support of tag-based checkpoint versioning; the version tags are stored in string sets. This commit adds such support.
2015-09-02sim: make warning for absent optional parameters optionalCurtis Dunham
This is in support of tag-based checkpoint versioning. It should be possible to examine an optional parameter in a checkpoint during unserialization and not have it throw a warning.
2015-09-01ruby: remove random seedNilay Vaish
We no longer use the C library based random number generator: random(). Instead we use the C++ library provided rng. So setting the random seed for the RubySystem class has no effect. Hence the variable and the corresponding option are being dropped.
2015-09-01ruby: directory memory: drop unused variable.Nilay Vaish
2015-09-01sim: Remove broken AutoSerialize support from the event queueAndreas Sandberg
Event auto-serialization no longer in use and has been broken ever since the introduction of PDES support almost two years ago. Additionally, serializing the individual event queues is undesirable since it exposes the thread structure of the simulator. What this means in practice is that the number of threads in the simulator must be the same when taking a checkpoint and when loading the checkpoint. This changeset removes support for the AutoSerialize event flag and the associated serialization code.
2015-09-01dev: Remove auto-serialization dependency in EtherLinkAndreas Sandberg
EtherLink currently uses a fire-and-forget link delay event that delays sending of packets by a fixed number of ticks. In order to serialize this event, it relies on the event queue's auto serialization support. However, support for event auto serialization has been broken for more than two years, which means that checkpoints of multi-system setups are likely to drop in-flight packets. This changeset the replaces rewrites this part of the EtherLink to use a packet queue instead. The queue contains a (tick, packet) tuple. The tick indicates when the packet will be ready. Instead of relying on event autoserialization, we now explicitly serialize the packet queue in the EhterLink::Link class. Note that this changeset changes the way in-flight packages are serialized. Old checkpoints will still load, but in-flight packets will be dropped (just as before). There has been no attempt to upgrade checkpoints since this would actually change the behavior of existing checkpoints.
2015-09-01sim: Remove autoserialize support for exit eventsAndreas Sandberg
This changeset removes the support for the autoserialize parameter in GlobalSimLoopExitEvent (including exitSimLoop()) and LocalSimLoopExitEvent. Auto-serialization of the LocalSimLoopExitEvent was never used, so this is not expected to affect anything. However, it was sometimes used for GlobalSimLoopExitEvent. Unfortunately, serialization of global events has never been supported, so checkpoints with such events will currently cause simulation panics. The serialize parameter to exitSimLoop() has been left in-place to maintain API compatibility (removing it would affect m5ops). Instead of just dropping it, we now print a warning if the parameter is set and the exit event is scheduled in the future (i.e., not at the current tick).
2015-09-01sim: Remove unused SerializeBuilder interfaceAndreas Sandberg
2015-09-01sim: Replace fromInt/fromSimObject with decltypeAndreas Sandberg
2015-09-01sim: Move SimObject resolver to sim_object.hhAndreas Sandberg
The object resolver isn't serialization specific and shouldn't live in serialize.hh. Move it to sim_object.hh since it queries to the SimObject hierarchy.
2015-08-30ruby: specify number of vnets for each protocolNilay Vaish
The default value for number of virtual networks is being removed. Each protocol should now specify the value it needs.
2015-08-30ruby: network: drop member m_in_useNilay Vaish
This member indicates whether or not a particular virtual network is in use. Instead of having a default big value for the number of virtual networks and then checking whether a virtual network is in use, the next patch removes the default value and the protocol configuration file would now specify the number of virtual networks it requires. Additionally, the patch also refactors some of the code used for computing the virtual channel next in the round robin order.
2015-08-30ruby: garnet: mark few functions const in BaseGarnetNetwork.hhNilay Vaish
2015-08-30ruby: slicc: avoid duplicate code for function argument checkNilay Vaish
Both FuncCallExprAST and MethodCallExprAST had code for checking the arguments with which a function is being called. The patch does away with this duplication. Now the code for checking function call arguments resides in the Func class.
2015-08-29ruby: eliminate type uint64 and int64Nilay Vaish
These types are being replaced with uint64_t and int64_t.
2015-08-28ruby: Use the const serialize interface in RubySystemAndreas Sandberg
The new serialization code (kudos to Tim Jones) moves all of the state mangling in RubySystem to memWriteback. This makes it possible to use the new const serialization interface. This changeset moves the cache recorder cleanup from the checkpoint() method to drainResume() to make checkpointing truly constant and updates the checkpointing code to use the new interface.
2015-08-27ruby: handle llsc accesses through CacheEntry, not CacheMemoryNilay Vaish
The sequencer takes care of llsc accesses by calling upon functions from the CacheMemory. This is unnecessary once the required CacheEntry object is available. Thus some of the calls to findTagInSet() are avoided.
2015-08-26cpu: quiesce pseudoinsts: Always do full quiesceEmilio Castillo
The O3CPU blocks the Fetch when it sees a quiesce instruction (IsQuiesce flag). When the inst. is executed, a quiesce event is created to reactivate the context and unblock the Fetch. If the quiesceNs or quiesceCycles are called with a value of 0, the QuiesceEvent will not be created and the Fetch stage will remain blocked. Committed by Joel Hestness <jthestness@gmail.com>
2015-08-24mem: Revert requirement on packet addr/size always validAndreas Hansson
This patch reverts part of (842f56345a42), as apparently there are use-cases outside the main repository relying on the late setting of the physical address.
2015-08-21mem: Reflect that packet address and size are always validAndreas Hansson
This patch simplifies the packet, and removes the possibility of creating a packet without a valid address and/or size. Under no circumstances are these fields set at a later point, and thus they really have to be provided at construction time. The patch also fixes a case there the MinorCPU creates a packet without a valid address and size, only to later delete it.
2015-08-21arm, mem: Remove unused CLEAR_LL request flagAndreas Hansson
Cleaning up dead code. The CLREX stores zero directly to MISCREG_LOCKFLAG and so the request flag is no longer needed. The corresponding functionality in the cache tags is also removed.
2015-08-21mem: Remove unused cache squash functionalityAndreas Hansson
Tidying up.
2015-08-21mem: Add explicit Cache subclass and make BaseCache abstractAndreas Hansson
Open up for other subclasses to BaseCache and transition to using the explicit Cache subclass. --HG-- rename : src/mem/cache/BaseCache.py => src/mem/cache/Cache.py
2015-08-21ruby: Move Rubys cache class from Cache.py to RubyCache.pyAndreas Hansson
This patch serves to avoid name clashes with the classic cache. For some reason having two 'SimObject' files with the same name creates problems. --HG-- rename : src/mem/ruby/structures/Cache.py => src/mem/ruby/structures/RubyCache.py
2015-08-21mem: Move cache_impl.hh to cache.ccAndreas Hansson
There is no longer any need to keep the implementation in a header.
2015-08-21cpu: Move invldPid constant from Request to BaseCPUAndreas Hansson
A more natural home for this constant.
2015-08-19ruby: reverts to changeset: bf82f1f7b040Nilay Vaish
2015-08-14ruby: add accessor functions to SLICC def of MachineIDNilay Vaish
2015-08-14ruby: simple network: refactor codeNilay Vaish
Drops an unused variable and marks three variables as const.
2015-08-14ruby: profiler: provide the number of vnets through ruby systemNilay Vaish
The aim is to ultimately do away with the static function Network::getNumberOfVirtualNetworks().
2015-08-14ruby: directory memory: drop unused variable.Nilay Vaish
2015-08-14ruby: slicc: remove a stray line in StateMachine.pyNilay Vaish
2015-08-14ruby: garnet: flexible: refactor flitNilay Vaish
2015-08-14ruby: DataBlock: adds a commentNilay Vaish
2015-08-14ruby: remove random seedNilay Vaish
We no longer use the C library based random number generator: random(). Instead we use the C++ library provided rng. So setting the random seed for the RubySystem class has no effect. Hence the variable and the corresponding option are being dropped.
2015-08-14ruby: SubBlock: refactor codeNilay Vaish
2015-08-14ruby: cache recorder: move check on block size to RubySystem.Nilay Vaish
2015-08-14ruby: abstract controller: mark some variables as constNilay Vaish
2015-08-14ruby: simple network: store Switch* in PerfectSwitch and ThrottleNilay Vaish
2015-08-14ruby: remove unused functionalRead() function.Nilay Vaish
2015-08-14ruby: perfect switch: refactor codeNilay Vaish
Refactored the code in operateVnet(), moved partly to a new function operateMessageBuffer().
2015-08-14ruby: cache memory: drop {try,test}CacheAccess functionsNilay Vaish
2015-08-14ruby: call setMRU from L1 controllers, not from sequencerNilay Vaish
Currently the sequencer calls the function setMRU that updates the replacement policy structures with the first level caches. While functionally this is correct, the problem is that this requires calling findTagInSet() which is an expensive function. This patch removes the calls to setMRU from the sequencer. All controllers should now update the replacement policy on their own. The set and the way index for a given cache entry can be found within the AbstractCacheEntry structure. Use these indicies to update the replacement policy structures.
2015-08-14ruby: adds set and way indices to AbstractCacheEntryNilay Vaish
2015-08-14ruby: eliminate type uint64 and int64Nilay Vaish
These types are being replaced with uint64_t and int64_t.
2015-08-14ruby: slicc: use default argument valueNilay Vaish
Before this patch, while one could declare / define a function with default argument values, but the actual function call would require one to specify all the arguments. This patch changes the check for function arguments. Now a function call needs to specify arguments that are at least as much as those with default values and at most the total number of arguments taken as input by the function.
2015-08-14ruby: slicc: avoid duplicate code for function argument checkNilay Vaish
Both FuncCallExprAST and MethodCallExprAST had code for checking the arguments with which a function is being called. The patch does away with this duplication. Now the code for checking function call arguments resides in the Func class.