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

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Message-ID: <3cdbddeb-bab9-789e-d9bc-8358dc5a635e@gmail.com>
Date:   Thu, 13 Jul 2023 12:44:31 -0400
From:   Vincent Fu <vincentfu@...il.com>
To:     richard clark <richard.xnu.clark@...il.com>, fio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Question about the 'bw' field in the fio output

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