![]() ![]() In most cases, marking a variable volatile means the compiler is force to read this variable every time it is read. time, scanf) and parameters cannot be computed at compile time. To create work that cannot be computed at compile time and must be computed at run time, we will rely on two assumptions: Compilers are constantly improving and getting better at analyzing code. Use the same memory block as data site for all algorithms, and initialize the data before each algorithm – while this means that initialization with data happens during the timed portion, it will only happen once during the timed portion and so have negligible effect on the results.Avoid recursive functions and keep track of stack usage.If dynamic memory allocation is used, take total memory allocated into account as well.Compile with gcc on x86 and make sure all sizes are according to requirements.All I/O and timing of the benchmark will be done through this layer. Comments for each block of code more than 10 lines long.Ī thin abstraction layer will be provided for I/O and timing in a separate file.Meaningful names for variables and functions.X number of source code lines for timed portion of the benchmark.This section describes the initial goals of CoreMark and their implementation. (*Only when run is successful*)ĬoreMark 1.0 : 6508.490622 / GCC3.4.4 -O2 / Heap (*Only on a successful performance run*) See README.md for run and reporting rules. Seedcrc : 0xe9f5 (identifier for the input seeds)Ĭrclist : 0xe714 (validation for list part)Ĭrcmatrix : 0x1fd7 (validation for matrix part)Ĭrcstate : 0x8e3a (validation for state part)Ĭrcfinal : 0x33ff (iteration dependent output)Ĭorrect operation validated. Memory location : Code in flash, data in on chip RAM Iterations : 100000 (number of iterations used)Ĭompiler version : GCC3.4.4 (Compiler and version)Ĭompiler flags : -O2 (Compiler and linker flags) Iterations/Sec : 3864.734300 (Performance value to report) Total time (secs) : 25.875000 (actual time in seconds) Total ticks : 25875 (platform dependent value) This parameter may be omitted if parallel execution was not used.ĢK performance run parameters for coremark.M - Type of parallel execution (if used) and number of contexts This parameter may not be omitted when reporting CoreMark/MHz.This parameter may be omitted if all data was allocated on the heap in RAM.P - Parameters such as data and code allocation specifics N - Number of iterations per second with seeds 0,0,0圆6,size=2000) Use the following syntax to report results on a data sheet: Changing of source file other then core_portme* (use make check to validate).Changing configuration values in core_portme.h.Changing implementation in core_portme.c.Changing the method of acquiring seed values.Changing method of acquiring a data memory block.Changing toolchain and build/load/run options.All data type sizes must match size in bits such that:.All source files must be compiled with the same flags.% make XCFLAGS="-DTOTAL_DATA_SIZE=1200 -DPROFILE_RUN=1" REBUILD=1 run3.log The default for such a target when testing different configurations could be: TOTAL_DATA_SIZE must be set to 2000 bytes (default) for standard runs. If not using malloc or command line arguments are not supported, the buffer sizeįor the algorithms must be defined via the compiler define TOTAL_DATA_SIZE. The run target from make will run coremark with 2 different data initialization seeds. Run Parameters for the Benchmark ExecutableĬoreMark's executable takes several parameters as follows (but only if main() accepts arguments):ġst - A seed value used for initialization of data.Ģnd - A seed value used for initialization of data.ģrd - A seed value used for initialization of data.Ĥth - Number of iterations (0 for auto : default value)ħth - For malloc users only, ovreride the size of the input data buffer. linux/core_portme.mak) and add -pthread to the LFLAGS_END parameter. If you encounter undefined reference errors, please modify the core_portme.mak file for your platform, (e.g. Note: linking may fail on the previous command if your linker does not automatically add the pthread library. % make XCFLAGS="-DMULTITHREAD=4 -DUSE_FORK"
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