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dGPUs in all versions of ROCm and APUs starting with ROCM 2.2 can under-allocate scratch resources. This patch adds support for the CP to trigger a recoverable error so that the host can attempt to re-allocate scratch to satisfy the currently stalled kernel. Note that this patch does not include a mechanism to handle dynamic scratch allocation for queues with in-flight kernels, as these queues would first need to be drained and descheduled, which would require some additional effort in the hsaPP and HW queue scheduler. If the CP encounters this scenerio it will assert. I suspect this is not a particularly common occurence in most of our applications so it is left as a TODO. This patch also fixes a few memory leaks and updates the old DMA callback object interface to use a much cleaner c++11 lambda interface. Change-Id: Ica8a5fc88888283415507544d6cc49fa748fe84d Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42201 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/documentation/general_docs/building for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.