linux-kernel - Re: [PATCH 3/3] perf events: add timehist option to record and report

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Date:	Fri, 18 Feb 2011 11:53:16 -0700
From:	David Ahern <daahern@...co.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	paulus@...ba.org, Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 3/3] perf events: add timehist option to record and report



On 02/18/11 11:41, Arnaldo Carvalho de Melo wrote:
> 
> Think about tcpdump + networking tracepoints or 'perf probe' dynamic
> events in the network stack, he wants to merge those logs and correlate
> the tcpdump packet exchange with the tracepoints events in the network
> stack, etc.

I'm zoned in on ap logs, but tcpdump and network analysis is another
very good example. packets are tagged with realtime:

static inline void __net_timestamp(struct sk_buff *skb)
{
    skb->tstamp = ktime_get_real();
}


David
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