TSO test

[Eugene Grosbein]

17.03.2016 22:22, Eric van Gyzen пишет:
> Alan,
>
> That does sound useful.  As one complication, "vmstat -i" shows the
> interrupt rate since boot.  Either the test would need to reboot between
> each iteration, or vmstat would need to be improved to show the "recent"
> rate.  The latter would be a much welcome improvement, in my humble opinion.

vmstat with "-i" option shows interrupts since reboot
and without "-i" shows interrupts per interval,
look for "in" column under "faults":

$ vmstat 1 3
  procs      memory      page                    disks     faults         cpu
  r b w     avm    fre   flt  re  pi  po    fr  sr ad0 ad1   in   sy   cs us sy id
  0 1 17   9221M  1525M   197   0   0   0   215 119   0   0 1107  106  813  4  3 94
  0 1 17   9221M  1525M     0   0   0   0     0  47   0   0 1078  544 2505  0  2 98
  0 1 17   9221M  1525M     0   0   0   0     0  47   0   0 1082  509 2468  0  2 97

In this example, there were 107, 87 and 82 interrupts per each of last 3 seconds
excluding 1000 clock ("HZ") interrupts.