lmbench binary package in Ubuntu Focal arm64

 Lmbench is a set of utilities to test the performance
 of a unix system producing detailed results as well
 as providing tools to process them. It includes a series of
 micro benchmarks that measure some basic operating
 system and hardware metrics:
 .
  * file reading and summing
  * memory bandwidth while reading, writing and copying
  * copying data through pipes
  * copying data through Unix sockets
  * reading data through TCP/IP sockets

Source package