Re: [PATCH v2 0/5] Add support for specifying ramp up period by amount of IO

Vincent Fu <[email protected]> Wed, 7 Jan 2026 16:26:05 -0500
Newsgroups org.kernel.vger.fio
Message-ID <CAOp=CX=rVNLmxde-L34D=e7gL2a8f1EhbhcwY0UOgJsZr-in7w@mail.gmail.com>
On Wed, Jan 7, 2026 at 12:03 PM Jan Kara <[email protected]> wrote:
>
> <snip>
>
> Thanks for reporting. I had a look and on my machine it actually improves
> reported performance levels:
>
>             AVG      STDDEV
> old  50818766.4  845445.763
> new  54965054.6 1113699.088
>
> But IMHO this is mostly just a benchmarking noise due to changes in code
> alignment wrt caches and possibly data structure alignment as well. Just if
> I do two compilations of the same sources I get easily a difference in
> averages ~2 million ops (i.e., ~4%). So at this point I don't think it's
> really worth it to worry about...
>
>                                                                 Honza

Thanks. I tried on a second system and found no difference. Applied.

Vincent