From: Steven Rostedt <rostedt@goodmis.org>
To: Binoy Jayan <binoy.jayan@linaro.org>
Cc: Ingo Molnar <mingo@redhat.com>,
Daniel Wagner <daniel.wagner@bmw-carit.de>,
Arnd Bergmann <arnd@arndb.de>,
Linux kernel mailing list <linux-kernel@vger.kernel.org>,
Masami <masami.hiramatsu@linaro.org>
Subject: Re: [PATCH v4 3/3] tracing: Histogram for missed timer offsets
Date: Wed, 31 Aug 2016 08:42:46 -0400 [thread overview]
Message-ID: <20160831084246.52d0b47e@gandalf.local.home> (raw)
In-Reply-To: <CAHv-k_-kcgC5g2Fae0mrHM6by_FvwfwYp6o9AfP7S1S4=JQApA@mail.gmail.com>
On Wed, 31 Aug 2016 17:04:54 +0530
Binoy Jayan <binoy.jayan@linaro.org> wrote:
> On 30 August 2016 at 19:45, Steven Rostedt <rostedt@goodmis.org> wrote:
> > On Tue, 30 Aug 2016 15:58:44 +0530
> > Binoy Jayan <binoy.jayan@linaro.org> wrote:
> >
> >> +
> >> + TP_STRUCT__entry(
> >> + __field(long long, toffset)
> >> + __array(char, ccomm, TASK_COMM_LEN)
> >
> > Can curr be different than current? If not, lets not record it.
> >
> > -- Steve
> >
>
> Hi Steve,
>
> If my understanding is right, I think both are not the same. The
> predefined field relates to the current
> process which was interrupted by the hrtimer. This I guess does not
> have a meaning in this context.
> Mostly it is the idle process which is interrupted by the hrtimer. But
> the ccomm field refers to the task
> woken up by the process. The latencies are measured for this task. So
> I it is needed.
>
Then what is tcomm?
-- Steve
next prev parent reply other threads:[~2016-08-31 12:42 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-30 10:28 [PATCH v4 0/3] *** Latency histograms - IRQSOFF,PREEMPTOFF *** Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 1/3] tracing: Deference pointers without RCU checks Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 2/3] tracing: Add trace_irqsoff tracepoints Binoy Jayan
2016-08-30 11:30 ` Daniel Wagner
2016-08-30 11:49 ` Binoy Jayan
2016-08-30 14:08 ` Steven Rostedt
2016-08-31 11:39 ` Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 3/3] tracing: Histogram for missed timer offsets Binoy Jayan
2016-08-30 10:50 ` Masami Hiramatsu
2016-09-02 12:41 ` Binoy Jayan
2016-09-02 15:54 ` Masami Hiramatsu
2016-08-30 14:15 ` Steven Rostedt
2016-08-31 11:34 ` Binoy Jayan
2016-08-31 12:42 ` Steven Rostedt [this message]
2016-08-30 11:39 ` [PATCH v4 0/3] *** Latency histograms - IRQSOFF,PREEMPTOFF *** Daniel Wagner
2016-08-30 12:02 ` Masami Hiramatsu
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