Cross-compiling dhrystone
Dhrystone is a benchmarking tool. Here dhrystone
will be compiled from source and run on qemu-riscv64
.
Dhrystone is comparable to VAX 11/780 in a way that VAX 11/780 achieves 1757 dhrystones per second which is also referred to as 1 MIPS of VAX11/780. So number of dhrystones per seconds are obtained and then divided by 1757 to get MIPS. See this link for more details.
Cross-compiling for riscv64-unknown-linux-gnu
- Get the source code of
dhrystone
using the command below
git clone https://github.com/sifive/benchmark-dhrystone.git
- Navigate to root directory of repository and compile program with
riscv64-unknown-linux-gnu-gcc
instead of nativegcc
cd benchmark-dhrystone
make CC=riscv64-unknown-linux-gnu-gcc
- Execute following command to execute
dhrystone
binary
qemu-riscv64 -L $RISCV_SYSROOT ./dhrystone
Note: You may want to tweak Makefile
and dhry_1.c
a little bit to get the correct results.