Hello, I am trying to check how option --clocksource works. bash# fio --name job1 --size 10m --clocksource 2 valid values: gettimeofday Use gettimeofday(2) for timing : clock_gettime Use clock_gettime(2) for timing : cpu Use CPU private clock fio: failed parsing clocksource=2 bash# fio --name job1 --size 10m --clocksource gettimeofday(2) bash: syntax error near unexpected token `(' Below command works fine. bash# fio --name job1 --size 10m --clocksource gettimeofday It runs without error but quiet not sure how to see the effect of this option. also tried other options - clock_gettime, cpu gettimeofday and dont see any difference. Also is there any error in documentation passing gettimeofday(2) throws parse error. Thanks and Regards, Mohan