From: Jon Masters <jcm@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
RT <linux-rt-users@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Darren Hart <dvhart@linux.intel.com>,
Clark Williams <clark@redhat.com>
Subject: Re: [PATCH RT] hwlat_detector: Check the outer side of the loop
Date: Wed, 12 Sep 2012 10:57:28 -0400 [thread overview]
Message-ID: <5050A2D8.7080908@redhat.com> (raw)
In-Reply-To: <1347460451.10751.57.camel@gandalf.local.home>
On 09/12/2012 10:34 AM, Steven Rostedt wrote:
> The hwlat_detector performs the following test:
>
> t1 = ktime_get();
> t2 = ktime_get();
>
> [ do the checks of t2 - t1 ]
>
> It can detect things like SMIs if it occurs between the t1 and t2
> timestamps, as there will be a large difference between the two.
Oops. Good catch.
Jon.
prev parent reply other threads:[~2012-09-12 14:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 14:34 [PATCH RT] hwlat_detector: Check the outer side of the loop Steven Rostedt
2012-09-12 14:57 ` Jon Masters [this message]
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