/usr/bin/fio

fio-3.43
/usr/bin/fio [options] [job options] <job file(s)>
  --debug=options	Enable debug logging. May be one/more of:
			process,file,io,mem,blktrace,verify,random,parse,
			diskutil,job,mutex,profile,time,net,rate,compress,
			steadystate,helperthread,zbd,sprandom
  --parse-only		Parse options only, don't start any IO
  --merge-blktrace-only	Merge blktraces only, don't start any IO
  --output		Write output to file
  --bandwidth-log	Generate aggregate bandwidth logs
  --minimal		Minimal (terse) output
  --output-format=type	Output format (terse,json,json+,normal)
  --terse-version=type	Set terse version output format (default 3, or 2 or 4 or 5)
  --version		Print version info and exit
  --help		Print this page
  --cpuclock-test	Perform test/validation of CPU clock
  --crctest=[type]	Test speed of checksum functions
  --cmdhelp=cmd		Print command help, "all" for all of them
  --enghelp=engine	Print ioengine help, or list available ioengines
  --enghelp=engine,cmd	Print help for an ioengine cmd
  --showcmd		Turn a job file into command line options
  --eta=when		When ETA estimate should be printed
            		May be "always", "never" or "auto"
  --eta-newline=t	Force a new line for every 't' period passed
  --status-interval=t	Force full status dump every 't' period passed
  --readonly		Turn on safety read-only checks, preventing writes
  --section=name	Only run specified section in job file, multiple sections can be specified
  --alloc-size=kb	Set smalloc pool to this size in kb (def 16384)
  --warnings-fatal	Fio parser warnings are fatal
  --max-jobs=nr		Maximum number of threads/processes to support
  --server=args		Start a backend fio server
  --daemonize=pidfile	Background fio server, write pid to file
  --client=hostname	Talk to remote backend(s) fio server at hostname
  --remote-config=file	Tell fio server to load this local job file
  --idle-prof=option	Report cpu idleness on a system or percpu basis
			(option=system,percpu) or run unit work
			calibration only (option=calibrate)
  --inflate-log=log	Inflate and output compressed log
  --trigger-file=file	Execute trigger cmd when file exists
  --trigger-timeout=t	Execute trigger at this time
  --trigger=cmd		Set this command as local trigger
  --trigger-remote=cmd	Set this command as remote trigger
  --aux-path=path	Use this path for fio state generated files

Fio was written by Jens Axboe <axboe@kernel.dk>