gem5 - gem5

Age	Commit message (Collapse)	Author
2013-08-19	power: Add voltage domains to the clock domains	Akash Bagdia
	This patch adds the notion of voltage domains, and groups clock domains that operate under the same voltage (i.e. power supply) into domains. Each clock domain is required to be associated with a voltage domain, and the latter requires the voltage to be explicitly set. A voltage domain is an independently controllable voltage supply being provided to section of the design. Thus, if you wish to perform dynamic voltage scaling on a CPU, its clock domain should be associated with a separate voltage domain. The current implementation of the voltage domain does not take into consideration cases where there are derived voltage domains running at ratio of native voltage domains, as with the case where there can be on-chip buck/boost (charge pumps) voltage regulation logic. The regression and configuration scripts are updated with a generic voltage domain for the system, and one for the CPUs.
2013-08-19	config: Move the memory instantiation outside FSConfig	Andreas Hansson
	This patch moves the instantiation of the memory controller outside FSConfig and instead relies on the mem_ranges to pass the information to the caller (e.g. fs.py or one of the regression scripts). The main motivation for this change is to expose the structural composition of the memory system and allow more tuning and configuration without adding a large number of options to the makeSystem functions. The patch updates the relevant example scripts to maintain the current functionality. As the order that ports are connected to the memory bus changes (in certain regresisons), some bus stats are shuffled around. For example, what used to be layer 0 is now layer 1. Going forward, options will be added to support the addition of multi-channel memory controllers.
2013-06-27	sim: Add the notion of clock domains to all ClockedObjects	Akash Bagdia
	This patch adds the notion of source- and derived-clock domains to the ClockedObjects. As such, all clock information is moved to the clock domain, and the ClockedObjects are grouped into domains. The clock domains are either source domains, with a specific clock period, or derived domains that have a parent domain and a divider (potentially chained). For piece of logic that runs at a derived clock (a ratio of the clock its parent is running at) the necessary derived clock domain is created from its corresponding parent clock domain. For now, the derived clock domain only supports a divider, thus ensuring a lower speed compared to its parent. Multiplier functionality implies a PLL logic that has not been modelled yet (create a separate clock instead). The clock domains should be used as a mechanism to provide a controllable clock source that affects clock for every clocked object lying beneath it. The clock of the domain can (in a future patch) be controlled by a handler responsible for dynamic frequency scaling of the respective clock domains. All the config scripts have been retro-fitted with clock domains. For the System a default SrcClockDomain is created. For CPUs that run at a different speed than the system, there is a seperate clock domain created. This domain incorporates the CPU and the associated caches. As before, Ruby runs under its own clock domain. The clock period of all domains are pre-computed, such that no virtual functions or multiplications are needed when calling clockPeriod. Instead, the clock period is pre-computed when any changes occur. For this to be possible, each clock domain tracks its children.
2013-06-27	config: Add a system clock command-line option	Akash Bagdia
	This patch adds a 'sys_clock' command-line option and use it to assign clocks to the system during instantiation. As part of this change, the default clock in the System class is removed and whenever a system is instantiated a system clock value must be set. A default value is provided for the command-line option. The configs and tests are updated accordingly.
2013-05-30	mem: More descriptive DRAM config names	Andreas Hansson
	This patch changes the class names of the variuos DRAM configurations to better reflect what memory they are based on. The speed and interface width is now part of the name, and also the alias that is used to select them on the command line. Some minor changes are done to the actual parameters, to better reflect the named configurations. As a result of these changes the regressions change slightly and the stats will be bumped in a separate patch.
2013-04-22	config: Add a mem-type config option to se/fs scripts	Andreas Hansson
	This patch enables selection of the memory controller class through a mem-type command-line option. Behind the scenes, this option is treated much like the cpu-type, and a similar framework is used to resolve the valid options, and translate the short-hand description to a valid class. The regression scripts are updated with a hardcoded memory class for the moment. The best solution going forward is probably to get the memory out of the makeSystem functions, but Ruby complicates things as it does not connect the memory controller to the membus. --HG-- rename : configs/common/CpuConfig.py => configs/common/MemConfig.py
2013-01-07	config: Do not use hardcoded physmem in fs script	Andreas Hansson
	This patch generalises the address range resolution for the I/O cache and I/O bridge such that they do not assume a single memory. The patch involves adding a parameter to the system which is then defined based on the memories that are to be visible from the I/O subsystem, whether behind a cache or a bridge. The change is needed to allow interleaved memory controllers in the system.
2012-09-24	Regression: Set the clock for twosys-tsunami CPUs	Andreas Hansson
	This patch merely adds a clock other than the default 1 Tick for the CPUs of both the test system and drive system for the twosys-tsunami regression. The CPU frequency of the driver system is choosed to be twice that of the test system to ensure it is not the bottleneck (although in this case it mostly serves as a demonstration of a two-system setup),
2012-08-22	Bridge: Remove NACKs in the bridge and unify with packet queue	Andreas Hansson
	This patch removes the NACKing in the bridge, as the split request/response busses now ensure that protocol deadlocks do not occur, i.e. the message-dependency chain is broken by always allowing responses to make progress without being stalled by requests. The NACKs had limited support in the system with most components ignoring their use (with a suitable call to panic), and as the NACKs are no longer needed to avoid protocol deadlocks, the cleanest way is to simply remove them. The bridge is the starting point as this is the only place where the NACKs are created. A follow-up patch will remove the code that deals with NACKs in the endpoints, e.g. the X86 table walker and DMA port. Ultimately the type of packet can be complete removed (until someone sees a need for modelling more complex protocols, which can now be done in parts of the system since the port and interface is split). As a consequence of the NACK removal, the bridge now has to send a retry to a master if the request or response queue was full on the first attempt. This change also makes the bridge ports very similar to QueuedPorts, and a later patch will change the bridge to use these. A first step in this direction is taken by aligning the name of the member functions, as done by this patch. A bit of tidying up has also been done as part of the simplifications. Surprisingly, this patch has no impact on any of the regressions. Hence, there was never any NACKs issued. In a follow-up patch I would suggest changing the size of the bridge buffers set in FSConfig.py to also test the situation where the bridge fills up.
2012-03-02	CPU: Check that the interrupt controller is created when needed	Andreas Hansson
	This patch adds a creation-time check to the CPU to ensure that the interrupt controller is created for the cases where it is needed, i.e. if the CPU is not being switched in later and not a checker CPU. The patch also adds the "createInterruptController" call to a number of the regression scripts.
2012-02-13	MEM: Introduce the master/slave port roles in the Python classes	Andreas Hansson
	This patch classifies all ports in Python as either Master or Slave and enforces a binding of master to slave. Conceptually, a master (such as a CPU or DMA port) issues requests, and receives responses, and conversely, a slave (such as a memory or a PIO device) receives requests and sends back responses. Currently there is no differentiation between coherent and non-coherent masters and slaves. The classification as master/slave also involves splitting the dual role port of the bus into a master and slave port and updating all the system assembly scripts to use the appropriate port. Similarly, the interrupt devices have to have their int_port split into a master and slave port. The intdev and its children have minimal changes to facilitate the extra port. Note that this patch does not enforce any port typing in the C++ world, it merely ensures that the Python objects have a notion of the port roles and are connected in an appropriate manner. This check is carried when two ports are connected, e.g. bus.master = memory.port. The following patches will make use of the classifications and specialise the C++ ports into masters and slaves.
2012-01-28	SE/FS: Make SE vs. FS mode a runtime parameter.	Gabe Black

2012-01-17	MEM: Make the bus bridge unidirectional and fixed address range	Andreas Hansson
	This patch makes the bus bridge uni-directional and specialises the bus ports to be a master port and a slave port. This greatly simplifies the assumptions on both sides as either port only has to deal with requests or responses. The following patches introduce the notion of master and slave ports, and would not be possible without this split of responsibilities. In making the bridge unidirectional, the address range mechanism of the bridge is also changed. For the cases where communication is taking place both ways, an additional bridge is needed. This causes issues with the existing mechanism, as the busses cannot determine when to stop iterating the address updates from the two bridges. To avoid this issue, and also greatly simplify the specification, the bridge now has a fixed set of address ranges, specified at creation time.
2011-02-03	Config: Keep track of uncached and cached ports separately.	Gabe Black
	This makes sure that the address ranges requested for caches and uncached ports don't conflict with each other, and that accesses which are always uncached (message signaled interrupts for instance) don't waste time passing through caches.
2009-09-22	python: Move more code into m5.util allow SCons to use that code.	Nathan Binkert
	Get rid of misc.py and just stick misc things in __init__.py Move utility functions out of SCons files and into m5.util Move utility type stuff from m5/__init__.py to m5/util/__init__.py Remove buildEnv from m5 and allow access only from m5.defines Rename AddToPath to addToPath while we're moving it to m5.util Rename read_command to readCommand while we're moving it Rename compare_versions to compareVersions while we're moving it. --HG-- rename : src/python/m5/convert.py => src/python/m5/util/convert.py rename : src/python/m5/smartdict.py => src/python/m5/util/smartdict.py
2006-12-01	change this to be a quick one so that it's in the regressions every night - ↵	Lisa Hsu
	it's only maybe 15 min. long. tests/configs/twosys-tsunami-simple-atomic.py: don't need this import --HG-- rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/config.ini => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/config.ini rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/config.out => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/config.out rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/console.drivesys.sim_console => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/console.drivesys.sim_console rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/console.testsys.sim_console => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/console.testsys.sim_console rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/m5stats.txt => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/m5stats.txt rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/stderr => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/stderr rename : tests/long/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/stdout => tests/quick/80.netperf-stream/ref/alpha/linux/twosys-tsunami-simple-atomic/stdout rename : tests/long/80.netperf-stream/test.py => tests/quick/80.netperf-stream/test.py extra : convert_revision : 68497b2ef8b21590cb6c636485703e46dc616513
2006-12-01	add a simple netperf-stream test to the long tests.	Lisa Hsu
	tests/SConscript: add a new configuration for two-system tests (atomic simple only) --HG-- extra : convert_revision : 16c260ab16f38779fe17b1cab18f36d5c7a70846