On 10/26/18 6:54 AM, Mohanraj B wrote: > 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. The format is 'value' 'help', so you'd want to do: --clocksource=gettimeofday for instance. -- Jens Axboe