linux-kernel - Re: [PATCH 6/7] trace: Add an option for boot clock as trace clock

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Date:   Mon, 28 Nov 2016 18:05:51 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Joel Fernandes <joelaf@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        Prarit Bhargava <prarit@...hat.com>
Subject: Re: [PATCH 6/7] trace: Add an option for boot clock as trace clock

On Mon, 28 Nov 2016 14:35:23 -0800
John Stultz <john.stultz@...aro.org> wrote:

> From: Joel Fernandes <joelaf@...gle.com>
> 
> Unlike monotonic clock, boot clock as a trace clock will account for
> time spent in suspend useful for tracing suspend/resume. This uses
> earlier introduced infrastructure for using the fast boot clock.
> 

Acked-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve

> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Richard Cochran <richardcochran@...il.com>
> Cc: Prarit Bhargava <prarit@...hat.com>
> Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Joel Fernandes <joelaf@...gle.com>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
>  kernel/trace/trace.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 8696ce6..f7b64db 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -1125,6 +1125,7 @@ static struct {
>  	{ trace_clock,			"perf",		1 },
>  	{ ktime_get_mono_fast_ns,	"mono",		1 },
>  	{ ktime_get_raw_fast_ns,	"mono_raw",	1 },
> +	{ ktime_get_boot_fast_ns,	"boot",		1 },
>  	ARCH_TRACE_CLOCKS
>  };
>