Re: [PATCH 2/2] fio: add latency steady state detection

Sitsofe Wheeler <[email protected]> Mon, 28 Jul 2025 22:27:25 +0100

Newsgroups	org.kernel.vger.fio
Message-ID	<CALjAwxgo2O1sRw-DELeDbB5_RqPtO5Zt9rUR0OXpnkxmwW+5-A@mail.gmail.com>

On Fri, 25 Jul 2025 at 07:20, Luis Chamberlain <[email protected]> wrote:

<snip>

> diff --git a/HOWTO.rst b/HOWTO.rst
> index 55ebc388..c5e6a0ad 100644
> --- a/HOWTO.rst
> +++ b/HOWTO.rst
> @@ -4154,6 +4154,18 @@ Steady state
>                         Collect bandwidth data and calculate the least squares regression
>                         slope. Stop the job if the slope falls below the specified limit.
>
> +               **lat**
> +                       Collect completion latency data and calculate the maximum mean
> +                       deviation. Stop the job if the deviation falls below the specified
> +                       limit. The latency values are weighted by the number of I/O samples
> +                       in each measurement interval.
> +
> +               **lat_slope**
> +                       Collect completion latency data and calculate the least squares
> +                       regression slope. Stop the job if the slope falls below the
> +                       specified limit. The latency values are weighted by the number
> +                       of I/O samples in each measurement interval.
> +

You'll need to update the man page (fio.1) too.

-- 
Sitsofe