linux-kernel - [tip:timers/core] trace: Add an option for boot clock as trace clock

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Message-ID: <tip-80ec3552107ac16a836dbff4cf3c23fdd3256ee3@git.kernel.org>
Date:   Tue, 29 Nov 2016 09:12:30 -0800
From:   tip-bot for Joel Fernandes <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, richardcochran@...il.com, tglx@...utronix.de,
        rostedt@...dmis.org, joelaf@...gle.com, hpa@...or.com,
        prarit@...hat.com, john.stultz@...aro.org,
        linux-kernel@...r.kernel.org
Subject: [tip:timers/core] trace: Add an option for boot clock as trace
 clock

Commit-ID:  80ec3552107ac16a836dbff4cf3c23fdd3256ee3
Gitweb:     http://git.kernel.org/tip/80ec3552107ac16a836dbff4cf3c23fdd3256ee3
Author:     Joel Fernandes <joelaf@...gle.com>
AuthorDate: Mon, 28 Nov 2016 14:35:23 -0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 29 Nov 2016 18:02:59 +0100

trace: Add an option for boot clock as trace clock

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.

Signed-off-by: Joel Fernandes <joelaf@...gle.com>
Signed-off-by: John Stultz <john.stultz@...aro.org>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Steven Rostedt <rostedt@...dmis.org>
Cc: Prarit Bhargava <prarit@...hat.com>
Cc: Richard Cochran <richardcochran@...il.com>
Link: http://lkml.kernel.org/r/1480372524-15181-7-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 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
 };