Re: [PATCH] instrument softirq raising

merged.

* Pierre-Marc Fournier ([email protected]) wrote:
> This will allow the measuring of softirq latencies, and will make it easier to
> follow critical paths from irq arrival to process wakeup.
> 
> Signed-off-by: Pierre-Marc Fournier <[email protected]>
> ---
>  kernel/softirq.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/kernel/softirq.c b/kernel/softirq.c
> index b1fc694..07344c9 100644
> --- a/kernel/softirq.c
> +++ b/kernel/softirq.c
> @@ -325,6 +325,8 @@ void irq_exit(void)
>   */
>  inline fastcall void raise_softirq_irqoff(unsigned int nr)
>  {
> +	trace_mark(kernel_softirq_raise, "softirq %u", nr);
> +
>  	__raise_softirq_irqoff(nr);
>  
>  	/*
> -- 
> 1.5.3.4
> 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68