linux-kernel - Re: Question about the 'bw' field in the fio output

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Date:   Fri, 14 Jul 2023 11:10:29 +0800
From:   richard clark <richard.xnu.clark@...il.com>
To:     Vincent Fu <vincentfu@...il.com>
Cc:     fio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Question about the 'bw' field in the fio output

The information is very very helpful, thank you Vincent !!

On Fri, Jul 14, 2023 at 12:44 AM Vincent Fu <vincentfu@...il.com> wrote:
>
> On 7/13/23 11:43, richard clark wrote:
> > Hi,
> >
> > I found that sometimes the fio command will have an additional 'bw'
> > field as below:
> > ...
> > clat percentiles (usec):
> >    |  1.00th=[.  51]...
> > bw (  KiB/s): min=45689, max=49753, per=100.00%, avg=49658.56,
> > stdev=89.23, samples =5
> > iops            : min=.....
> > ...
> >
> > Please there is a line beginning with 'bw (  KiB/s)...', but sometimes
> > the 'bw' line doesn't show, does anybody know the reasons?
> >
> > Thanks.
>
> See:
>
> https://lore.kernel.org/fio/7b2f76ca-42bb-dc73-dd07-2cc79729ecb0@gmail.com/T/#t
>
> https://github.com/vincentkfu/fio-blog/wiki/Periodic-performance-measurements