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2014-05-09stats: Method stats sourceStephan Diestelhorst
This source for stats binds an object and a method / function from the object to a stats object. This allows pulling out stats from object methods without needing to go through a global, or static shim. Syntax is somewhat unpleasant, but the templates and method pointer type specification were quite tricky. Interface is very clean though; and similar to .functor
2014-04-23base: explicitly suggest potential use of 'All' debug flagsCurtis Dunham
Without this declaration, new clangs will complain about this value being unused. It has no explicit use in the codebase, but it can be useful to turn on all debugging flags while in a debugger to greatly increase simulator verbosity.
2014-04-09dev: Protect PollEvent processing when running in parallel modeAndreas Sandberg
The calling thread is undefined when the PollQueue services events. This implies that PollEvents need to handle the case where they are processed from a different thread than the thread that created the event. This changeset adds temporary event queue migrations to the VNC server, the ethernet tap device, and the terminal to protect them from inter-thread calls.
2014-03-23base: Fix error message time unit (cycle -> tick)Andreas Hansson
This patch fixes the unit used in all error messages.
2014-03-07misc: Add panic_if / fatal_if / chatty_assertStephan Diestelhorst
This snippet can be used to replace if + {panics, fatals, asserts} constructs. The idea is to have both the condition checking and a verbose printout in a single statement. The interface is as follows: panic_if(foo != bar, "These should be equal: foo %i bar %i", foo, bar); fatal_if(foo != bar, "These should be equal: foo %i bar %i", foo, bar); chatty_assert(foo == bar, "These should be equal: foo %i bar %i", foo, bar);
2014-03-07scons: Fixes uninitialized warnings issued by clangMitch Hayenga
Small fixes to appease recent clang versions.
2014-02-06base: calls abort() from fatalNilay Vaish
Currently fatal() ends the simulation in a normal fashion. This results in the call stack getting lost when using a debugger and it is not always possible to debug the simulation just from the information provided by the printed error message. Even though the error is likely due to a user's fault, the information available should not be thrown away. Hence, this patch to call abort() from fatal().
2014-01-28base: Fix race condition in the socket listen functionMitch Hayenga
gem5 makes the incorrect assumption that by binding a socket, it effectively has allocated a port. Linux only allocates ports once you call listen on the given socket, not when you call bind. So even if the port was free when bind was called, another process (gem5 instance) could race in between the bind & listen calls and steal the port. In the current code, if the call to bind fails due to the port being in use (EADDRINUSE), gem5 retries for a different port. However if listen fails, gem5 just panics. The fix is testing the return value of listen and re-trying if it was due to EADDRINUSE. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2014-01-24arm: Add support for ARMv8 (AArch64 & AArch32)ARM gem5 Developers
Note: AArch64 and AArch32 interworking is not supported. If you use an AArch64 kernel you are restricted to AArch64 user-mode binaries. This will be addressed in a later patch. Note: Virtualization is only supported in AArch32 mode. This will also be fixed in a later patch. Contributors: Giacomo Gabrielli (TrustZone, LPAE, system-level AArch64, AArch64 NEON, validation) Thomas Grocutt (AArch32 Virtualization, AArch64 FP, validation) Mbou Eyole (AArch64 NEON, validation) Ali Saidi (AArch64 Linux support, code integration, validation) Edmund Grimley-Evans (AArch64 FP) William Wang (AArch64 Linux support) Rene De Jong (AArch64 Linux support, performance opt.) Matt Horsnell (AArch64 MP, validation) Matt Evans (device models, code integration, validation) Chris Adeniyi-Jones (AArch64 syscall-emulation) Prakash Ramrakhyani (validation) Dam Sunwoo (validation) Chander Sudanthi (validation) Stephan Diestelhorst (validation) Andreas Hansson (code integration, performance opt.) Eric Van Hensbergen (performance opt.) Gabe Black
2014-01-10stats: add function for adding two histogramsNilay Vaish
This patch adds a function to the HistStor class for adding two histograms. This functionality is required for Ruby. It also adds support for printing histograms in a single line.
2013-11-29base: Fix race in PollQueue and remove SIGALRM workaroundAndreas Sandberg
There is a race between enabling asynchronous IO for a file descriptor and IO events happening on that descriptor. A SIGIO won't normally be delivered if an event is pending when asynchronous IO is enabled. Instead, the signal will be raised the next time there is an event on the FD. This changeset simulates a SIGIO by setting the async_io flag when setting up asynchronous IO for an FD. This causes the main event loop to poll all file descriptors to check for pending IO. As a consequence of this, the old SIGALRM hack should no longer be needed and is therefore removed.
2013-11-29base: Clean up signal handlingAndreas Sandberg
The PollEvent class dynamically installs a SIGIO and SIGALRM handler when a file handler is registered. Most signal handlers currently get registered in the initSignals() function. This changeset moves the SIGIO/SIGALRM handlers to initSignals() to live with the other signal handlers. The original code installs SIGIO and SIGALRM with the SA_RESTART option to prevent syscalls from returning EINTR. This changeset consistently uses this flag for all signal handlers to ensure that other signals that trigger asynchronous behavior (e.g., statistics dumping) do not cause undesirable EINTR returns.
2013-11-25sim: simulate with multiple threads and event queuesSteve Reinhardt ext:(%2C%20Nilay%20Vaish%20%3Cnilay%40cs.wisc.edu%3E%2C%20Ali%20Saidi%20%3CAli.Saidi%40ARM.com%3E)
This patch adds support for simulating with multiple threads, each of which operates on an event queue. Each sim object specifies which eventq is would like to be on. A custom barrier implementation is being added using which eventqs synchronize. The patch was tested in two different configurations: 1. ruby_network_test.py: in this simulation L1 cache controllers receive requests from the cpu. The requests are replied to immediately without any communication taking place with any other level. 2. twosys-tsunami-simple-atomic: this configuration simulates a client-server system which are connected by an ethernet link. We still lack the ability to communicate using message buffers or ports. But other things like simulation start and end, synchronizing after every quantum are working. Committed by: Nilay Vaish
2013-10-31base: Add support for ipv6 into inet.hh/inet.ccGeoffrey Blake
2013-10-07base: Fix a potential race in PollQueue::setupAsyncIOAndreas Sandberg
There is a potential race between enabling asynchronous IO and selecting the target for the SIGIO signal. This changeset move the F_SETOWN call to before the F_SETFL call that enables SIGIO delivery. This ensures that signals are always sent to the correct process.
2013-09-09stats: add operator= for DataWrapVec classNilay Vaish
gcc/g++ 4.4.7 complained about the operator= being undefined. This changeset adds the operator.
2013-09-06ruby: network: convert to gem5 style statsNilay Vaish
2013-09-06stats: adds a Formula operator for divisionNilay Vaish
2013-09-04arch: Resurrect the NOISA build target and rename it NULLAndreas Hansson
This patch makes it possible to once again build gem5 without any ISA. The main purpose is to enable work around the interconnect and memory system without having to build any CPU models or device models. The regress script is updated to include the NULL ISA target. Currently no regressions make use of it, but all the testers could (and perhaps should) transition to it. --HG-- rename : build_opts/NOISA => build_opts/NULL rename : src/arch/noisa/SConsopts => src/arch/null/SConsopts rename : src/arch/noisa/cpu_dummy.hh => src/arch/null/cpu_dummy.hh rename : src/cpu/intr_control.cc => src/cpu/intr_control_noisa.cc
2013-09-04arch: Header clean up for NOISA resurrectionAndreas Hansson
This patch is a first step to getting NOISA working again. A number of redundant includes make life more difficult than it has to be and this patch simply removes them. There are also some redundant forward declarations removed.
2013-09-04scons: Enable build on OSXAndreas Hansson
This patch changes the SConscript to build gem5 with libc++ on OSX as the conventional libstdc++ does not have the C++11 constructs that the current code base makes use of (e.g. std::forward). Since this was the last use of the transitional TR1, the unordered map and set header can now be simplified as well.
2013-08-20base: Fix VectorPrint initialisationAndreas Hansson
This patch changes how the initialisation of the VectorPrint struct is done so that gcc 4.4 is happy again.
2013-08-19stats: Fix issue when printing 2D vectorsSascha Bischoff
This patch addresses an issue with the text-based stats output which resulted in Vector2D stats being printed without subnames in the event that one of the dimensions was of length 1. This patch also fixes the total printing for the 2D vector. Previously totals were printed without explicitly stating that a total was being printed. This has been rectified in this patch.
2013-07-15loader: Load weak symbols for function tracingDeyuan Guo
2013-06-27base: Fix address range granularity calculationAndreas Hansson
This patch fixes a bug in the granularity calculation. For example, if the high bit is 6 (counting from 0) and we have one interleaving bit, then the granularity is now 2 ** (6 - 1 + 1) = 64.
2013-06-27stats: Remove printing of SparseHist totalSascha Bischoff
This patch removes the printing of the SparseHist total in the stats.txt output file. This has been removed as a sparse histogram has no total, and therefore this was printing out the value of a non-local, unrelated variable.
2013-06-09stats: allow printing vectors on a single lineNilay Vaish
This patch adds a new flag to specify if the data values for a given vector should be printed in one line in the stats.txt file. The default behavior will be to print the data in multiple lines. It makes changes to print functions to enforce this behavior.
2013-04-17base: load weak symbols from object fileDeyuan Guo ext:(%2C%20Nilay%20Vaish%20%3Cnilay%40cs.wisc.edu%3E)
Without loading weak symbols into gem5, some function names and the given PC cannot correspond correctly, because the binding attributes of unction names in an ELF file are not only STB_GLOBAL or STB_LOCAL, but also STB_WEAK. This patch adds a function for loading weak symbols. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2013-03-07base: Fix address range granularity calculationsAndreas Hansson
This patch fixes a bug in the address range granularity calculations. Previously it incorrectly used the high bit to establish the size of the regions created, when it should really be looking at the low bit.
2013-02-19scons: Fix warnings issued by clang 3.2svn (XCode 4.6)Andreas Hansson
This patch fixes the warnings that clang3.2svn emit due to the "-Wall" flag. There is one case of an uninitialised value in the ARM neon ISA description, and then a whole range of unused private fields that are pruned.
2013-02-19scons: Add warning for missing declarationsAndreas Hansson
This patch enables warnings for missing declarations. To avoid issues with SWIG-generated code, the warning is only applied to non-SWIG code.
2013-02-19scons: Fix up numerous warnings about name shadowingAndreas Hansson
This patch address the most important name shadowing warnings (as produced when using gcc/clang with -Wshadow). There are many locations where constructor parameters and function parameters shadow local variables, but these are left unchanged.
2013-02-19base: Fix a bug in the address interleavingAndreas Hansson
This patch fixes a minor (but important) typo in the matching of an address to an interleaved range.
2013-02-15loader: add a flattened device tree blob (dtb) objectAnthony Gutierrez
this adds a dtb_object so the loader can load in the dtb file for linux/android ARM kernels.
2013-02-10ruby: replace Time with Cycles in Message classNilay Vaish
Concomitant changes are being committed as well, including the io operator<< for the Cycles class.
2013-02-10base: add some mathematical operators to Cycles classNilay Vaish
2013-01-07scons: Enforce gcc >= 4.4 or clang >= 2.9 and c++0x supportAndreas Hansson
This patch checks that the compiler in use is either gcc >= 4.4 or clang >= 2.9. and enables building with --std=c++0x in all cases. As a consequence, we can tidy up the hashmap and always have static_assert available. If anyone wants to use alternative compilers, icc for example supports c++0x to a similar level and could be added if needed. This patch opens up for a more elaborate use of c++0x features that are present in gcc 4.4 and clang 2.9, e.g. auto typed variables, variadic templates, rvalues and move semantics, and strongly typed enums. There will be no going back on this one...
2013-01-07scons: Remove stale compiler optionsAndreas Hansson
This patch simply prunes the SUNCC and ICC compiler options as they are both sufficiently stale that they would have to be re-written from scratch anyhow. The patch serves to clean things up before shifting to a build environment that enforces basic c++11 compliance as done in the following patch.
2013-01-07base: Add support for merging of interleaved address rangesAndreas Hansson
This patch adds support for merging a vector of interleaved address ranges into a contigous range. The functionality will be used in the interconnect and the PhysicalMemory to transform interleaved memory ranges to contigous ranges before passing them on. The actual use of the merging is appearing in future patches.
2013-01-07mem: Add interleaving bits to the address rangesAndreas Hansson
This patch adds support for interleaving bits for the address ranges. What was previously just a start and end address, now has an additional three fields, for the high bit, and number of bits to use for interleaving, and a match value to compare against. If the number of interleaving bits is set to zero it is effectively disabled. A number of convenience functions are added to the range to enquire about the interleaving, its granularity and the number of stripes it is part of.
2013-01-07base: Simplify the AddrRangeMap by removing unused codeAndreas Hansson
This patch cleans up the AddrRangeMap in preparation for the addition of interleaving by removing unused code. The non-const editions of find are never used, and hence the duplication is not needed.
2013-01-07base: Encapsulate the underlying fields in AddrRangeAndreas Hansson
This patch makes the start and end address private in a move to prevent direct manipulation and matching of ranges based on these fields. This is done so that a transition to ranges with interleaving support is possible. As a result of hiding the start and end, a number of member functions are needed to perform the comparisons and manipulations that previously took place directly on the members. An accessor function is provided for the start address, and a function is added to test if an address is within a range. As a result of the latter the != and == operator is also removed in favour of the member function. A member function that returns a string representation is also created to allow debug printing. In general, this patch does not add any functionality, but it does take us closer to a situation where interleaving (and more cleverness) can be added under the bonnet without exposing it to the user. More on that in a later patch.
2013-01-07mem: Add tracing support in the communication monitorAndreas Hansson
This patch adds packet tracing to the communication monitor using a protobuf as the mechanism for creating the trace. If no file is specified, then the tracing is disabled. If a file is specified, then for every packet that is successfully sent, a protobuf message is serialized to the file.
2012-11-16sim: have a curTick per eventqNilay Vaish
This patch adds a _curTick variable to an eventq. This variable is updated whenever an event is serviced in function serviceOne(), or all events upto a particular time are processed in function serviceEvents(). This change helps when there are eventqs that do not make use of curTick for scheduling events.
2012-11-02sim: Include object header files in SWIG interfacesAndreas Sandberg
When casting objects in the generated SWIG interfaces, SWIG uses classical C-style casts ( (Foo *)bar; ). In some cases, this can degenerate into the equivalent of a reinterpret_cast (mainly if only a forward declaration of the type is available). This usually works for most compilers, but it is known to break if multiple inheritance is used anywhere in the object hierarchy. This patch introduces the cxx_header attribute to Python SimObject definitions, which should be used to specify a header to include in the SWIG interface. The header should include the declaration of the wrapped object. We currently don't enforce header the use of the header attribute, but a warning will be generated for objects that do not use it.
2012-11-02base: Add missing header file to addr_range.hh.Andreas Sandberg
2012-11-02base: Fix a few incorrectly handled print format casesChander Sudanthi
This patch ensures cases like %0.6u, %06f, and %.6u are processed correctly. The case like %06f is ambiguous and was made to match printf. Also, this patch removes the goto statement in cprintf.cc in favor of a function call.
2012-11-02base: split out the VncServer into a VncInput and Server classesChander Sudanthi
This patch adds a VncInput base class which VncServer inherits from. Another class can implement the same interface and be used instead of the VncServer, for example a class that replays Vnc traffic. --HG-- rename : src/base/vnc/VncServer.py => src/base/vnc/Vnc.py rename : src/base/vnc/vncserver.cc => src/base/vnc/vncinput.cc rename : src/base/vnc/vncserver.hh => src/base/vnc/vncinput.hh
2012-10-15Mem: Use range operations in bus in preparation for stripingAndreas Hansson
This patch transitions the bus to use the AddrRange operations instead of directly accessing the start and end. The change facilitates the move to a more elaborate AddrRange class that also supports address striping in the bus by specifying interleaving bits in the ranges. Two new functions are added to the AddrRange to determine if two ranges intersect, and if one is a subset of another. The bus propagation of address ranges is also tweaked such that an update is only propagated if the bus received information from all the downstream slave modules. This avoids the iteration and need for the cycle-breaking scheme that was previously used.
2012-09-25ARM: added support for flattened device tree blobsDam Sunwoo
Newer Linux kernels require DTB (device tree blobs) to specify platform configurations. The input DTB filename can be specified through gem5 parameters in LinuxArmSystem.