nanoBench: A tool for running small microbenchmarks on recent Intel and AMD x86 CPUs.

Re: https://firmwaresecurity.com/2018/11/04/upos-info-latency-throughput-and-port-usage-information-for-instructions-on-recent-intel-microarchitectures/

nanoBench is a Linux-based tool for running small microbenchmarks on recent Intel and AMD x86 CPUs. The microbenchmarks are evaluated using hardware performance counters. The reading of the performance counters is implemented in a way that incurs only minimal overhead. There are two variants of the tool: A user-space implementation and a kernel module. The kernel module makes it possible to benchmark privileged instructions, and it can allow for more accurate measurement results as it disables interrupts and preemptions during measurements. The disadvantage of the kernel module compared to the user-space variant is that it is quite risky to allow arbitrary code to be executed in kernel space. Therefore, the kernel module should not be used on a production system. nanoBench is used for running the microbenchmarks for obtaining the latency, throughput, and port usage data that is available on uops.info.

https://github.com/andreas-abel/nanoBench

http://uops.info/