Question about the 'bw' field in the fio output

[richard clark <richard.xnu.clark@xxxxxxxxx>]

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.