Benchmarking: Coremark

Decompress

root@jph1:~# tar zxvf coremark_v1.0
cd coremark_v1.0

Adjust compilation flags

Seems to be in ./linux64/core_portme.mak

• Change PORT_CFLAGS value to -O3
• Add extra flags to the end of the CFLAGS statement

For example (added -funroll-all-loops --param max-inline-insns-auto=200):

CC = gcc
# Flag: CFLAGS
#       Use this flag to define compiler options. Note, you can add compiler options from the command line using XCFLAGS="other flags"
PORT_CFLAGS = -O3
FLAGS_STR = "$(PORT_CFLAGS) $(XCFLAGS) $(XLFLAGS) $(LFLAGS_END)"
CFLAGS = $(PORT_CFLAGS) -I$(PORT_DIR) -I. -DFLAGS_STR=\"$(FLAGS_STR)\" -funroll-all-loops --param max-inline-insns-auto=200

Run benchmark

Run benchmark with make:

root@jph1:~/coremark_v1.0# pwd
/root/coremark_v1.0
root@jph1:~/coremark_v1.0# make

If you have a fast system (faster than a RaspberryPi), increase the number of iterations to increase the test run to give a more meaningful result:

root@jph1:~/coremark_v1.0# make ITERATIONS=10