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From: Vaibhav Nagarnaik <vnagarnaik@google.com>
Date: Wed, 21 Sep 2011 11:20:51 -0700
Message-ID: <CAL26m8JH7CyEdYUXtiC8fOmtSzeteFez2h-aWqJu06Lo77npAQ@mail.gmail.com>
Subject: Re: [PATCH 1/2] trace,x86: Add tracepoint to x86 timer interrupt handler
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>, Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Steven Rostedt <rostedt@goodmis.org>,
        Michael Rubin <mrubin@google.com>, David Sharp <dhsharp@google.com>,
        LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        Andrew Morton <akpm@linux-foundation.org>
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On Wed, Sep 21, 2011 at 2:01 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Fri, 29 Jul 2011, Vaibhav Nagarnaik wrote:
>
>> The x86 timer interrupt handler is the only handler not traced in the
>> irq/irq_handler_{entry|exit} trace events.
>
> Nonsense. The timer irq (irq0) comes via the genirq interrupt handling
> and not via a special vector. So it's traced already.
>

Thanks for pointing it out, I confused the PIT/HPET for the local timer
vector.

Could you also take a look at the patches that add tracing for traps?
https://lkml.org/lkml/2011/5/3/455
https://lkml.org/lkml/2011/5/3/456



Vaibhav Nagarnaik