From: Clark Williams <williams@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>, Carsten Emde <C.Emde@osadl.org>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jon Masters <jcm@redhat.com>, Daniel Wagner <wagi@monom.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [RFC][PATCH 0/3] tracing: Add Hardware Latency detector tracer
Date: Tue, 9 Aug 2016 13:15:16 -0500 [thread overview]
Message-ID: <20160809131516.6a83e93e@sluggy.hsv.redhat.com> (raw)
In-Reply-To: <20160804113033.78132a93@gandalf.local.home>
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On Thu, 4 Aug 2016 11:30:33 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
> Note, I'm currently working on adding code to detect NMIs to this as
> well. And perhaps even tracing SMI counters. Just to show what caused
> the latency, as latency isn't measured by the counters (that I know of).
>
I like the trace report, but for one small thing; I think it's worth either adding units to the reported latency values (us suffix) or putting in a header line that hwlatdetect values are reported in microseconds.
> <...>-2644 [001] d... 202.735708: [99] inner:13 outer:16 ts:1470352534.886878855
> <...>-2644 [001] d... 206.767274: [100] inner:14 outer:18747 ts:1470352538.917966818 smi-total:2
> <...>-2644 [002] d... 207.775164: [101] inner:0 outer:19162 ts:1470352539.920988709 smi-total:6
> <...>-2644 [003] d... 208.783067: [102] inner:19376 outer:19276 ts:1470352540.923010578 smi-total:6
> <...>-2644 [000] d... 209.827416: [103] inner:19650 outer:20665 ts:1470352541.926032469 smi-total:6
> <...>-2644 [001] d... 210.831062: [104] inner:20526 outer:20680 ts:1470352542.973055312 smi-total:6
Clark
--
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Ruining natural selection since 1790
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next prev parent reply other threads:[~2016-08-09 18:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 14:57 [RFC][PATCH 0/3] tracing: Add Hardware Latency detector tracer Steven Rostedt
2016-08-04 14:57 ` [RFC][PATCH 1/3] tracing: Added hardware latency tracer Steven Rostedt
2016-08-05 14:25 ` Sebastian Andrzej Siewior
2016-08-05 14:44 ` Steven Rostedt
2016-08-05 15:28 ` Sebastian Andrzej Siewior
2016-08-05 15:36 ` Steven Rostedt
2016-08-04 14:57 ` [RFC][PATCH 2/3] tracing: Add documentation for hwlat_detector tracer Steven Rostedt
2016-08-10 14:12 ` Jon Masters
2016-08-04 14:57 ` [RFC][PATCH 3/3] tracing: Have hwlat trace migrate across tracing_cpumask CPUs Steven Rostedt
2016-08-04 15:30 ` [RFC][PATCH 0/3] tracing: Add Hardware Latency detector tracer Steven Rostedt
2016-08-09 18:15 ` Clark Williams [this message]
2016-08-09 18:30 ` Steven Rostedt
2016-08-04 16:56 ` [RFC][PATCH 4/3] tracing: Add NMI tracing in hwlat detector Steven Rostedt
2016-08-04 17:16 ` Steven Rostedt
2016-08-05 14:35 ` Sebastian Andrzej Siewior
2016-08-05 14:52 ` Steven Rostedt
2016-08-05 15:40 ` Sebastian Andrzej Siewior
2016-08-05 16:17 ` Steven Rostedt
2016-08-09 17:22 ` Steven Rostedt
2016-08-10 14:10 ` Jon Masters
2016-08-09 18:05 ` [RFC][PATCH 5/3] tracing: Add smi counting to HWLAT Steven Rostedt
2016-08-09 18:28 ` Daniel Bristot de Oliveira
2016-08-09 18:35 ` Steven Rostedt
2016-08-09 21:25 ` Peter Zijlstra
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