cyring/crc32bench

CRC32 Benchmark for x86_64 processors

crc32bench

CRC32 Benchmark for x86_64 processors

- Prerequisities -

	C compiler: gcc or clang
	TASKSET: part of the util-linux package

- Compilation -

	cc -Wall -O0 crc32bench.c -o crc32bench

- Input -

	# ASM version
	taskset -c 1 ./crc32bench a GenuineIntel AuthenticAMD

	# C version
	taskset -c 1 ./crc32bench c GenuineIntel AuthenticAMD

- Results (gcc) -

	# ASM version
	Benchmark = 8882632044 cycles
	crc32bench(GenuineIntel,12) => 75a2ba39
	crc32bench(GenuineIntel,12) => 75a2ba39

	# C version (gcc)
	Benchmark = 31046108769 cycles
	crc32bench(GenuineIntel,12) => 75a2ba39
	crc32bench(AuthenticAMD,12) => 3485bbd3

	# C version (clang)
	Benchmark = 17586801852 cycles
	crc32bench(GenuineIntel,12) => 75a2ba39
	crc32bench(AuthenticAMD,12) => 3485bbd3