Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer
Date	2016-08-19 16:10 +0200
Message-ID	<s7SEF-6Cv-7@gated-at.bofh.it> (permalink)
References	<s4GTn-n4-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Aug 10, 2016 at 09:53:56AM -0400, Steven Rostedt wrote:
> Changes since v1:
> 
>  . Added checks for CONFIG_GENERIC_SCHED_CLOCK, and if that is set,
>    only nmi_counts will be recorded when an NMI is triggered, but not
>    the time in NMI, because the generic sched_clock is not NMI safe.
>    (suggested by Sebastian Andrzej Siewior)

So any of the platforms using GENERIC_SCHED_CLOCK _have_ NMIs ?

In any case, for those you could probably use ktime_get_mono_fast_ns().

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Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer Peter Zijlstra <peterz@infradead.org> - 2016-08-19 16:10 +0200
  Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer Steven Rostedt <rostedt@goodmis.org> - 2016-08-19 17:00 +0200
    Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer Peter Zijlstra <peterz@infradead.org> - 2016-08-19 17:10 +0200
      Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer John Stultz <john.stultz@linaro.org> - 2016-08-19 18:40 +0200
        Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer Thomas Gleixner <tglx@linutronix.de> - 2016-08-23 11:00 +0200
        Re: [PATCH v2 0/4] tracing: Add Hardware Latency detector tracer Peter Zijlstra <peterz@infradead.org> - 2016-08-23 11:50 +0200

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