>Intro SOFTIRQ delay, so we can separate softirq as SOFTIRQ delay
>and hardirq as {IRQ - SOFTIRQ} delay.
>
>A typical scenario is when tasks delayed by network,
>if they delayed by rx net packets, i.e, net_rx_action(),
>SOFTIRQ delay is almost same as IRQ delay;
>if they delayed by, e.g, bad driver or broken hardware,
>SOFTIRQ delay is almost 0 while IRQ delay remains big.
>
>Examples tool usage could be found in
>Documentation/accounting/delay-accounting.rst
>
>Signed-off-by: Tio Zhang <tiozhang@xxxxxxxxxxxxxx>
Reviewed-by: Wang Yaxin <wang.yaxin@xxxxxxxxxx>
Thanks
Yaxin
