From: Drew Richardson <drew.richardson@arm.com>
To: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
John Stultz <john.stultz@linaro.org>,
Wade Cherry <wade.cherry@arm.com>,
Drew Richardson <drew.richardson@arm.com>
Subject: [PATCH] ftrace: Provide trace clock monotonic raw
Date: Mon, 4 May 2015 07:41:09 -0700 [thread overview]
Message-ID: <1430750469-16428-1-git-send-email-drew.richardson@arm.com> (raw)
Expose the NMI safe accessor to the monotonic raw clock to the
tracer. The mono clock was added with commit
1b3e5c0936046e7e023149ddc8946d21c2ea20eb. Although the monotonic raw
clock cannot be used to compare time between different machines, it is
not perterbed by ntp.
Signed-off-by: Drew Richardson <drew.richardson@arm.com>
---
kernel/trace/trace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 05330494a0df..458031c31a37 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -876,6 +876,7 @@ static struct {
{ trace_clock_jiffies, "uptime", 0 },
{ trace_clock, "perf", 1 },
{ ktime_get_mono_fast_ns, "mono", 1 },
+ { ktime_get_raw_fast_ns, "mono_raw", 1 },
ARCH_TRACE_CLOCKS
};
--
2.1.4
next reply other threads:[~2015-05-04 14:41 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 14:41 Drew Richardson [this message]
2015-05-04 15:10 ` Mathieu Desnoyers
2015-05-04 20:05 ` Drew Richardson
2015-05-04 20:47 ` John Stultz
2015-05-04 20:57 ` Peter Zijlstra
2015-05-05 14:54 ` Drew Richardson
2015-05-08 0:42 ` Steven Rostedt
2015-05-08 1:27 ` Mathieu Desnoyers
2015-05-08 14:09 ` Steven Rostedt
2015-05-08 14:29 ` Drew Richardson
2015-05-08 14:30 ` [PATCHv3] " Drew Richardson
2015-05-08 14:41 ` Steven Rostedt
2015-05-08 16:05 ` John Stultz
2015-05-08 16:15 ` Steven Rostedt
2015-05-08 16:21 ` John Stultz
2015-05-08 16:11 ` Peter Zijlstra
2015-05-12 14:26 ` Thomas Gleixner
2015-05-12 19:59 ` Steven Rostedt
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