Cross-compiling Coremark

Coremark is another benchmarking tool. Here coremark will be cross-compiled for riscv64-unknown-linux-gnu and will be run on qemu-riscv64. The github source code commit at the time of build is eefc986ebd3452d6adde22eafaff3e5c859f29e4 and branch is main.

Getting the source code

Execute the following command to get the source code of coremark. 

git clone https://github.com/eembc/coremark.git

Tweaking source files for riscv64-unknown-linux-gnu

At the time of this documentation, linux is being used for this test. First of all core_portme.mak will be changed.

  1. Navigate to linux/ directory in source repository.
  2. Open core_portme.mak. Here a single line will be used to include core_portme.mak from posix directory. So, navigate to posix/ directory in source folder
  3. Open core_portme.mak in posix/ directory and do the following changes to variables here.
    1. Change CC?=cc to CC=riscv64-unknown-linux-gnu-gcc.
    2. Scroll down and change EXE=.exe to EXE= (it should be blank).
    3. Scroll down and change LD=gcc to LD=riscv64-unknown-linux-gnu-ld.
    4. As we are using qemu-riscv64, so change RUN= to RUN=qemu-riscv64 -L "$$RISCV_SYSROOT"
    5. Save changes and exit this file.
  4. Now open core_portme.h and change #define USE_CLOCK 0 to #define USE_CLOCK 1 and save.
  5. Navigate to source directory of repository and execute following command 
make PORT_DIR=linux/

If everything went right, the output result will be stored in run1.log and run2.log and will be of the form as shown below. 

2K validation run parameters for coremark.
CoreMark Size    : 666
Total ticks      : 12368459
Total time (secs): 12.368459
Iterations/Sec   : 8893.589735
Iterations       : 110000
Compiler version : GCC12.2.0
Compiler flags   : -O2 -DPERFORMANCE_RUN=1  -lrt
Memory location  : Please put data memory location here
            (e.g. code in flash, data on heap etc)
seedcrc          : 0x18f2
[0]crclist       : 0xe3c1
[0]crcmatrix     : 0x0747
[0]crcstate      : 0x8d84
[0]crcfinal      : 0x0956
Correct operation validated. See README.md for run and reporting rules.