Make `iostat -xC` print CPU information on its own line

[allanjude]

Summary

In illumos, the equivelent command iostat -xc returns a much nicer format

Before:

 # iostat -xC 1
                        extended device statistics             cpu
device       r/s     w/s     kr/s     kw/s  ms/r  ms/w  ms/o  ms/t qlen  %b  us ni sy in id
da0          306     372   9924.7  12134.0     2     3     0     2    1  78   0  0  3  0 97
da1            0       0     28.3      0.3    19    13     0    18    0   1
da2            0       0      0.1      0.0     2     0     0     2    0   0

illumos:

# iostat -xnc 1
    cpu
us sy dt id
10  6  0 84
                   extended device statistics
   r/s    w/s   kr/s   kw/s wait actv wsvc_t asvc_t  %w  %b device
   0.0    0.0    0.0    0.0  0.0  0.0    0.0    0.0   0   0 fd0
   0.5    1.2   31.4    9.1  0.1  0.0   54.5    4.8   0   1 filepool
   0.0    8.9    0.7  111.3  0.4  0.1   48.6    8.7   1   6 rpool
   0.0    0.1    0.0    0.0  0.0  0.0    0.0    0.0   0   0 c1t0d0
   0.0    0.1    0.0    0.0  0.0  0.0    0.0    0.0   0   0 c1t1d0

After:

 # iostat -xC 1
      cpu
 us ni sy in id
  0  0  0  0 100
                        extended device statistics
device       r/s     w/s     kr/s     kw/s  ms/r  ms/w  ms/o  ms/t qlen  %b
da0            0       0      0.0      0.0     0     0     0     0    0   0
da1            0       0      0.0      0.0     0     0     0     0    0   0
da2            0       0      0.0      0.0     0     0     0     0    0   0

[allanjude]

Fix alignment of the cpu header

Spotted by mjg

[ken]

I agree, this looks like a better way to do it. It may break anyone who has scripts built to parse the output of iostat -xC, but I doubt there are many people doing that.

[mahrens]

Thanks!