Re: [RFC 0/2] apic: tracing IPI events

[Jiri Olsa]

On Fri, Aug 06, 2010 at 01:26:36PM +0200, Andi Kleen wrote:
> Jiri Olsa <jolsa@xxxxxxxxxx> writes:
> >
> > please let me know what you think
> 
> You forgot to state why you want it?
> 
> In generall the only case that should happen anytime commonly is mask,
> the others only for obscure uncommon paths.
> 
> However there is already accounting for it in /proc/interrupts
> that can be easily sampled. Does adding additional tracing really give 
> any value?

As I was asked to do that for other guys, I'm not completely sure.
Anyway the reason I got was, that while debuging crash it seemed 
some IPIs might got lost.

Also it'd be probably used as a tracepoint itself via additional code,
than by ring buffer tracing.

I'll check if I can get more justifing info..

jirka

> 
> -Andi
> -- 
> ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/