Comparison of sieve program for x86_64, arm, and qemu-arm on x86_64

Compilation

The program sieve.c is compiled into sieve with the local gcc (gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0). The arm executable sieve-arm is made using the armv7-eabihf-glibc-stable-2018.11-1 toolchain provided by bootlin.

Tests

The executables are ran in three different configurations:

1. x86_64: ./sieve 7000000
2. raspberry pi2: ./sieve-arm 7000000
3. qemu-arm on x86_64: qemu-arm -L /home/user/armv7-eabihf--glibc--stable-2018.11-1/arm-buildroot-linux-gnueabihf/sysroot/ sieve-arm 7000000

All tests are timed and repeated 100 times. In a separate shell ps is ran to collect memory usage information. This is done by using the following commands:

• for i in $(seq 0 99); do time **command 1, 2, or 3 **; done > sieve.txt 2> sieve_times.txt
• while true; do ps u -q `pgrep sieve, sieve-arm or qemu-arm` 2>/dev/null; sleep 0.2; done | tee sieve_mem.txt

Results

For the three different configurations this results in:

1. sieve_native_times.txt and sieve_native_mem.txt
2. sieve_arm_times.txt and sieve_arm_mem.txt
3. sieve_qemu_times.txt and sieve_qemu_mem.txt