diff mbox

[6/7] trace: Add an option for boot clock as trace clock

Message ID 1480372524-15181-7-git-send-email-john.stultz@linaro.org
State New
Headers show

Commit Message

John Stultz Nov. 28, 2016, 10:35 p.m. UTC
From: Joel Fernandes <joelaf@google.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.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Joel Fernandes <joelaf@google.com>

Signed-off-by: John Stultz <john.stultz@linaro.org>

---
 kernel/trace/trace.c | 1 +
 1 file changed, 1 insertion(+)

-- 
2.7.4

Comments

Steven Rostedt Nov. 28, 2016, 11:05 p.m. UTC | #1
On Mon, 28 Nov 2016 14:35:23 -0800
John Stultz <john.stultz@linaro.org> wrote:

> From: Joel Fernandes <joelaf@google.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@goodmis.org>


-- Steve

> Cc: Steven Rostedt <rostedt@goodmis.org>

> Cc: Thomas Gleixner <tglx@linutronix.de>

> Cc: Ingo Molnar <mingo@redhat.com>

> Cc: Richard Cochran <richardcochran@gmail.com>

> Cc: Prarit Bhargava <prarit@redhat.com>

> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

> Signed-off-by: Joel Fernandes <joelaf@google.com>

> Signed-off-by: John Stultz <john.stultz@linaro.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

>  };

>
diff mbox

Patch

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
 };