IntroductionSome of today’s modern CPUs come with dedicated instructions to optimize specific operations. For example, ARMv8 has CRC32 instructions to accelerate CRC calculations. The problem is that those instructions can only be executed by a processor that supports them. Although the CPU has a feature register to identify its capabilities, checking the register before executing an instruction is time-consuming. Fortunately, the Linux kernel has…
Click to Read More at Oracle Linux Kernel Development
