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2015-09-18dev, arm: Add gem5 extensions to support more than 8 coresKarthik Sangaiah
Previous ARM-based simulations were limited to 8 cores due to limitations in GICv2 and earlier. This changeset adds a set of gem5-specific extensions that enable support for up to 256 cores. When the gem5 extensions are enabled, the GIC uses CPU IDs instead of a CPU bitmask in the GIC's register interface. To OS can enable the extensions by setting bit 0x200 in ICDICTR. This changeset is based on previous work by Matt Evans.
2015-12-07cpu: Support virtual addr in elastic tracesRadhika Jagtap
This patch adds support to optionally capture the virtual address and asid for load/store instructions in the elastic traces. If they are present in the traces, Trace CPU will set those fields of the request during replay.
2015-12-07cpu: Create record type enum for elastic tracesRadhika Jagtap
This patch replaces the booleans that specified the elastic trace record type with an enum type. The source of change is the proto message for elastic trace where the enum is introduced. The struct definitions in the elastic trace probe listener as well as the Trace CPU replace the boleans with the proto message enum. The patch does not impact functionality, but traces are not compatible with previous version. This is preparation for adding new types of records in subsequent patches.
2015-12-07util: Add decode and encode scripts for elastic tracesRadhika Jagtap
This patch adds python scripts to parse a protobuf encoded O3CPU elastic trace and convert it to a text file output and vice versa.
2015-12-04util: term: drop CC from MakefileBjoern A. Zeeb
With clang there are systems without gcc being installed anymore and we should not rely on that. This patch drops CC so that system's default compiler is invoked. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-12-04util: DrainManager/Checkpoint changes in SystemC couplingAbdul Mutaal Ahmad
Due to changes in Drain Manager, the lastest systemc coupling doesn't work. The code for handling Checkpoint has been modified and it is now compatiable with new drain manager. Testing is being done on systemC coupling. It needs more testing to verify checkpointing feature. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-09-10sim: Update C++ config example to match SystemC exampleAndrew Bardsley
Update the use of the drain manager, and checkpointing to match changes to gem5 since the example was written.
2015-11-22config: Minor fixes to the DRAM utilisation sweepAndreas Hansson
2015-09-30base: remove Trace::enabled flagCurtis Dunham
The DTRACE() macro tests both Trace::enabled and the specific flag. This change uses the same administrative interface for enabling/disabling tracing, but masks the SimpleFlags settings directly. This eliminates a load for every DTRACE() test, e.g. DPRINTF.
2015-09-30isa,cpu: Add support for FS SMT InterruptsMitch Hayenga
Adds per-thread interrupt controllers and thread/context logic so that interrupts properly get routed in SMT systems.
2015-09-25util: Fix minor issues in DRAM sweep scriptsAndreas Hansson
This patch fixes a few issues in the sweep scripts, bringing them up-to-date with the latest memory configs and options.
2015-09-15misc: Bugfix for Freezing Terminal in SystemC SimulationAbdul Mutaal Ahmad
If the terminal was used in the SystemC or TLM simulations the simulation gets in a deadlock state. This is because of the Event queue gets locked while servicing the async events leading to event queue deadlock. This was solved by locking the queue at the beginning of service of async events. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-09-15misc: Bugfix in TLM integration regarding CleanEvict CommandAbdul Mutaal Ahmad
The CleanEvict command was not considered in /util/tlm/sc_port.cc this could lead to a simulator crash. This issue is solved by ignoring this special command type. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-09-11dev, arm: Rewrite the HDLCD controllerAndreas Sandberg
Rewrite the HDLCD controller to use the new DMA engine and pixel pump. This fixes several bugs in the current implementation: * Broken/missing interrupt support (VSync, underrun, DMA end) * Fragile resolution changes (changing resolutions used to cause assertion errors). * Support for resolutions with a width that isn't divisible by 32. * The pixel clock can now be set dynamically. This breaks checkpoint compatibility. Checkpoints can be upgraded with the checkpoint conversion script. However, upgraded checkpoints won't contain the state of the current frame. That means that HDLCD controllers restoring from a converted checkpoint immediately start drawing a new frame (i.e, expect timing differences).
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.
2015-08-05util: Enable DRAM sweep to print power and efficiencyAndreas Hansson
This patch enhances the functionality of the DRAM sweep script to not only plot the bandwidth utilisation, but also total power and power efficiency. To do so, a command-line switch is added, and a bit more data extracted from the stats.
2015-08-03misc: Coupling gem5 with SystemC TLM2.0Matthias Jung
Transaction Level Modeling (TLM2.0) is widely used in industry for creating virtual platforms (IEEE 1666 SystemC). This patch contains a standard compliant implementation of an external gem5 port, that enables the usage of gem5 as a TLM initiator component in SystemC based virtual platforms. Both TLM coding paradigms loosely timed (b_transport) and aproximately timed (nb_transport) are supported. Compared to the original patch a TLM memory manager was added. Furthermore, the transaction object was removed and for each TLM payload a PacketPointer that points to the original gem5 packet is added as an TLM extension. For event handling single events are now created. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-07-20util: added .cl OpenCL extension to file_type.pyBrad Beckmann
2015-07-20util: added .mk makefile extension to file_types.pyBrad Beckmann
2015-07-31util: add a vimrc that matches gem5 style guideAnthony Gutierrez
2015-07-24base: refactor process class (specifically FdMap and friends)Brandon Potter
This patch extends the previous patch's alterations around fd_map. It cleans up some of the uglier code in the process file and replaces it with a more concise C++11 version. As part of the changes, the FdMap class is pulled out of the Process class and receives its own file.
2015-07-15dev: add support for multi gem5 runsGabor Dozsa
Multi gem5 is an extension to gem5 to enable parallel simulation of a distributed system (e.g. simulation of a pool of machines connected by Ethernet links). A multi gem5 run consists of seperate gem5 processes running in parallel (potentially on different hosts/slots on a cluster). Each gem5 process executes the simulation of a component of the simulated distributed system (e.g. a multi-core board with an Ethernet NIC). The patch implements the "distributed" Ethernet link device (dev/src/multi_etherlink.[hh.cc]). This device will send/receive (simulated) Ethernet packets to/from peer gem5 processes. The interface to talk to the peer gem5 processes is defined in dev/src/multi_iface.hh and in tcp_iface.hh. There is also a central message server process (util/multi/tcp_server.[hh,cc]) which acts like an Ethernet switch and transfers messages among the gem5 peers. A multi gem5 simulations can be kicked off by the util/multi/gem5-multi.sh wrapper script. Checkpoints are supported by multi-gem5. The checkpoint must be initiated by a single gem5 process. E.g., the gem5 process with rank 0 can take a checkpoint from the bootscript just before it invokes 'mpirun' to launch an MPI test. The message server process will notify all the other peer gem5 processes and make them take a checkpoint, too (after completing a global synchronisation to ensure that there are no inflight messages among gem5).
2015-07-03util: Remove DRAMPower trace scriptAndreas Hansson
This script is deprecated and DRAMPower is now properly integrated with the controller model.
2015-06-01sim, arm: add checkpoint upgrader for d02b45a5Curtis Dunham
The insertion of CONTEXTIDR_EL2 in the ARM miscellaneous registers obsoletes old checkpoints.
2015-03-19config: Add soak test for memtest.pyAndreas Hansson
This patch adds a random option to memtest.py which allows the user to easily test valid random tree topologies. The patch also adds a wrapper script to run soak tests using the newly introduced option. We also adjust the progress interval and progress limit check to make the output less noisy, and avoid false positives. Bring on the pain.
2015-02-16cpu: add support for outputing a protobuf formatted CPU traceAli Saidi
Doesn't support x86 due to static instruction representation. --HG-- rename : src/cpu/CPUTracers.py => src/cpu/InstPBTrace.py
2015-02-11style: Fix broken m5format commandAndreas Sandberg
The m5format command didn't actually work due to parameter handling issues and missing language detection. This changeset fixes those issues and cleans up some of the code to shared between the style checker and the format checker.
2015-02-11style: Fix incorrect style checker option nameAndreas Sandberg
The style used to support the option -w to automatically fix white space issues. However, this option was actually wired up to fix all styles issues the checker encountered. This changeset cleans up the code that handles automatic fixing and adds an option to fix all issues, and separate options for white spaces and include ordering.
2015-02-03style: Update the style checker to handle new include orderAndreas Sandberg
As of August 2014, the gem5 style guide mandates that a source file's primary header is included first in that source file. This helps to ensure that the header file does not depend on include file ordering and avoids surprises down the road when someone tries to reuse code. In the new order, include files are grouped into the following blocks: * Primary header file (e.g., foo.hh for foo.cc) * Python headers * C system/stdlib includes * C++ stdlib includes * Include files in the gem5 source tree Just like before, include files within a block are required to be sorted in alphabetical order. This changeset updates the style checker to enforce the new order.
2014-12-02config: Fix to SystemC example's event handlingAndrew Bardsley
This patch fixes checkpoint restore in the SystemC hosting example by handling early PollEvent events correctly before any EventQueue events are posted. The SystemC event queue handler (SCEventQueue) reports an error if the event loop is entered with no Events posted. It is possible for this to happen after instantiate due to PollEvent events. This patch separates out `external' events into a different handler in sc_module.cc to prevent the error from occurring. This fix also improves the event handling of asynchronous events by: 1) Making asynchronous events 'catch up' gem5 time to SystemC time to avoid the appearance that events have been lost while servicing an asynchronous event that schedules an event loop exit event 2) Add an in_simulate data member to Module to allow the event loop to check whether events should be processed or deferred until the next time Module::simulate is entered 3) Cancel pending events around the entry/exit of the event loop in Module::simulate 4) Moving the state initialisation of the example entirely into run to correct a problem with early events in checkpoint restore. It is still possible to schedule asynchronous events (and talk PollQueue actions) while simulate is not running. This behaviour may stil cause some problems.
2014-12-02config: SystemC Gem5Control top level additionsAndrew Bardsley
This patch cleans up a few style issues and adds a few capabilities to the SystemC top level 'Gem5Control/Gem5System' mechanism. These include: 1) A space to store/retrieve a version string for a model 2) A mechanism for registering functions to be called at the end of elaboration to perform simulation setup tasks in SystemC 3) Adding setGDBRemotePort to the Gem5Control 4) Changing the sc_set_time_resolution behaviour to instead check that the SystemC time resolution is already acceptable
2014-11-23kvm, x86: Adding support for SE mode executionAlexandru Dutu
This patch adds methods in KvmCPU model to handle KVM exits caused by syscall instructions and page faults. These types of exits will be encountered if KvmCPU is run in SE mode.
2014-11-14config: Fix checkpoint restore in C++ config exampleAndrew Bardsley
This patch fixes the checkpoint restore option in the example of C++ configuration (util/cxx_config). The fix introduces a call to config_manager->startup() (which calls startup on all SimObjects managed by that manager) to replicate the loop of SimObject::startup calls in src/python/m5/simulate.py::simulate guarded by need_startup. As util/cxx_config/main.cc is a C++ analogue of src/python/mt/simulate.py, it should make a similar set of calls.
2014-10-16sim: SystemC hostingAndrew Bardsley
This patch hosts gem5 onto SystemC scheduler. There's already an upstream review board patch that does something similar but this patch ...: 1) is less obtrusive to the existing gem5 code organisation. It's divided into the 'generic' preparatory patches (already submitted) and this patch which affects no existing files 2) does not try to exactly track the gem5 event queue with notifys into SystemC and so doesn't requive the event queue to be modified for anything other than 'out of event queue' scheduling events 3) supports debug logging with SC_REPORT The patch consists of the files: util/systemc/ sc_gem5_control.{cc,hh} -- top level objects to use to instantiate gem5 Systems within larger SystemC test harnesses as sc_module objects sc_logger.{cc,hh} -- logging support sc_module.{cc,hh} -- a separated event loop specific to SystemC stats.{cc,hh} -- example Stats handling for the sample top level main.{cc,hh} -- a sample top level On the downside this patch is only currently functional with C++ configuration at the top level. The above sc_... files are indended to be compiled alongside gem5 (as a library, see main.cc for a command line and util/systemc/README for more details.) The top-level system instantiation in sc_gem5_control.{cc,hh} provides two classes: Gem5Control and Gem5System Gem5Control is a simulation control class (from which a singleton object should be created) derived from Gem5SystemC::Module which carries the top level simulation control interface for gem5. This includes hosting a system-building configuration file and instantiating the Root object from that file. Gem5System is a base class for instantiating renamed gem5 Systems from the config file hosted by the Gem5Control object. In use, a SystemC module class should be made which represents the desired, instantiable gem5 System. That class's instances should create a Gem5System during their construction, set the parameters of that system and then call instantiate to build that system. If this is all carried out in the sc_core::sc_module-derived classes constructor, the System's external ports will become children of that module and can then be recovered by name using sc_core:: sc_find_object. It is intended that this interface is used with dlopen. To that end, the header file sc_gem5_control.hh includes no other header files from gem5 (and so can be easily copied into another project). The classes Gem5System and Gem5Control have all their member functions declared `virtual' so that those functions can be called through the vtable acquired by building the top level Gem5Control using dlsym(..., "makeGem5Control") and `makeSystem' on the Gem5Control.
2014-10-16config: Add the ability to read a config file using C++ and PythonAndreas Hansson
This patch adds the ability to load in config.ini files generated from gem5 into another instance of gem5 built without Python configuration support. The intended use case is for configuring gem5 when it is a library embedded in another simulation system. A parallel config file reader is also provided purely in Python to demonstrate the approach taken and to provided similar functionality for as-yet-unknown use models. The Python configuration file reader can read both .ini and .json files. C++ configuration file reading: A command line option has been added for scons to enable C++ configuration file reading: --with-cxx-config There is an example in util/cxx_config that shows C++ configuration in action. util/cxx_config/README explains how to build the example. Configuration is achieved by the object CxxConfigManager. It handles reading object descriptions from a CxxConfigFileBase object which wraps a config file reader. The wrapper class CxxIniFile is provided which wraps an IniFile for reading .ini files. Reading .json files from C++ would be possible with a similar wrapper and a JSON parser. After reading object descriptions, CxxConfigManager creates SimObjectParam-derived objects from the classes in the (generated with this patch) directory build/ARCH/cxx_config CxxConfigManager can then build SimObjects from those SimObjectParams (in an order dictated by the SimObject-value parameters on other objects) and bind ports of the produced SimObjects. A minimal set of instantiate-replacing member functions are provided by CxxConfigManager and few of the member functions of SimObject (such as drain) are extended onto CxxConfigManager. Python configuration file reading (configs/example/read_config.py): A Python version of the reader is also supplied with a similar interface to CxxConfigFileBase (In Python: ConfigFile) to config file readers. The Python config file reading will handle both .ini and .json files. The object construction strategy is slightly different in Python from the C++ reader as you need to avoid objects prematurely becoming the children of other objects when setting parameters. Port binding also needs to be strictly in the same port-index order as the original instantiation.
2014-10-11util: adds a script for using DSENTNilay Vaish
This patch adds a python script that processes the configuration and the statistics file from a simulation run. Configuration and activity of network routers and links obtained from this processing is fed to DSENT via its Python interface. DSENT then computes the area and the power consumption of these network components. The script outputs these quantities to the console.
2014-09-03config: Update Streamline scripts and configsDam Sunwoo
Updated the stat_config.ini files to reflect new structure. Moved to a more generic stat naming scheme that can easily handle multiple CPUs and L2s by letting the script replace pre-defined # symbols to CPU or L2 ids. Removed the previous per_switch_cpus sections. Still can be used by spelling out the stat names if necessary. (Resuming from checkpoints no longer use switch_cpus. Only fast-forwarding does.)
2014-04-29arm: use condition code registers for ARM ISACurtis Dunham
Analogous to ee049bf (for x86). Requires a bump of the checkpoint version and corresponding upgrader code to move the condition code register values to the new register file.
2014-09-03mem: Add utility script to plot DRAM efficiency sweepAndreas Hansson
This patch adds basic functionality to quickly visualise the output from the DRAM efficiency script. There are some unfortunate hacks needed to communicate the needed information from one script to the other, and we fall back on (ab)using the simout to do this. As part of this patch we also trim the efficiency sweep to stop at 512 bytes as this should be sufficient for all forseeable DRAMs.
2014-08-26style: Add support for a style ignore list and ignore ext/Andreas Sandberg
There are some directories within the repository where we don't want to enforce our coding style. Specifically, we don't want the style hooks to warn whenever we update external code in the ext/ directory.
2014-08-26style: Fixup strange semantics in hg m5styleAndreas Sandberg
The 'hg m5style' command had some rather strange semantics. When called without arguments, it applied the style checker to all added files and modified regions of modified files. However, when providing a list of files, it used that list as an ignore list instead of specifically checking those files. This patch makes the m5style command behave more like other Mercurial commands where the arguments are used to specify which files to work on instead of which files to ignore.
2014-02-05sim: bump checkpoint version for multiple event queuesCurtis Dunham
This patch adds a fix for older checkpoints before support for multiple event queues were added in changeset 2cce74fe359e. The change in checkpoint version should really hav ebeen part of the aforementioned changeset.
2014-08-13util: Fix state leakage in the SortIncludes style verifierAndreas Sandberg
There are cases where the state of a SortIncludes object gets messed up and leaks between invocations/files. This typically happens when a file ends with an include block (dump_block() gets called at the end of __call__). In this case, the state of the class is not reset between files. This bug manifests itself as ghost includes that leak between files when applying the style hooks. This changeset adds a reset at the beginning of the __call__ method which ensures that the class is always in a clean state when processing a new file.
2014-08-10util: Move packet trace file read to protolibRadhika Jagtap
This patch moves the code for opening an input protobuf packet trace into a function defined in the protobuf library. This is because the code is commonly used in decode scripts and is independent of the src protobuf message.
2014-07-23cpu: `Minor' in-order CPU modelAndrew Bardsley
This patch contains a new CPU model named `Minor'. Minor models a four stage in-order execution pipeline (fetch lines, decompose into macroops, decompose macroops into microops, execute). The model was developed to support the ARM ISA but should be fixable to support all the remaining gem5 ISAs. It currently also works for Alpha, and regressions are included for ARM and Alpha (including Linux boot). Documentation for the model can be found in src/doc/inside-minor.doxygen and its internal operations can be visualised using the Minorview tool utils/minorview.py. Minor was designed to be fairly simple and not to engage in a lot of instruction annotation. As such, it currently has very few gathered stats and may lack other gem5 features. Minor is faster than the o3 model. Sample results: Benchmark | Stat host_seconds (s) ---------------+--------v--------v-------- (on ARM, opt) | simple | o3 | minor | timing | timing | timing ---------------+--------+--------+-------- 10.linux-boot | 169 | 1883 | 1075 10.mcf | 117 | 967 | 491 20.parser | 668 | 6315 | 3146 30.eon | 542 | 3413 | 2414 40.perlbmk | 2339 | 20905 | 11532 50.vortex | 122 | 1094 | 588 60.bzip2 | 2045 | 18061 | 9662 70.twolf | 207 | 2736 | 1036
2014-07-01util: Add DVFS perfLevel to checkpoint upgrade scriptRadhika Jagtap
This patch updates the checkpoint upgrader script. It adds the _perfLevel variable in the clock domain and voltage domain simObjects used for DVFS.
2014-06-30mem: DRAMPower trace formatting scriptAndreas Hansson
This patch adds a first version of a script that processes the debug output and generates a command trace for DRAMPower. This is work in progress and is intended as a snapshot of ongoing work at this point. The longer term plan is to link in DRAMPower as a library and have one instance of the model per rank, and instantiate it based on a struct passed from gem5. Each command will then be a call to the model and no parsing of traces will be necessary.
2014-06-09Util: Do not style check symlinksJoel Hestness
The style checker used to traverse symlinks if they pointed to files, which can result in style checker failure if the pointed-to file doesn't exist. This style check is actually unnecessary, since symlinks either point to other files that are already style checked, or files outside gem5, which shouldn't be checked. Skip symlinks.
2014-05-09arm: Add Makefile for aarch64 build of util/m5Eric Van Hensbergen
2014-04-23util: Valgrind suppression additionMitch Hayenga
Adds a suppression rule to util/valgrind-suppressions due to a minor bug present in zlib that has no impact on simulation.