From: Lowell Gilbert <kludge@be-well.ilk.org>
To: xenomai@xenomai.org
Subject: Re: [Xenomai] Altera Cyclone V
Date: Tue, 07 Jan 2014 22:21:49 -0500 [thread overview]
Message-ID: <44a9f7ma42.fsf@be-well.ilk.org> (raw)
In-Reply-To: <52CC83F1.40000@xenomai.org> (Gilles Chanteperdrix's message of "Tue, 07 Jan 2014 23:47:13 +0100")
Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> writes:
> On 01/07/2014 11:19 PM, Charles Steinkuehler wrote:
>> The single-core A8 on the
>> BeagleBone is good for about 25 uS typical and 80 uS or so worst case
>> latency.
>
> That is really high. On a 720MHz OMAP3, with the latency test running
> with a 100us period, I typically get latencies close to 40us (under
> dohell load). Granted I do not run many functionalities of the SOC
> (typically, not the graphic processor), but I would not expect latencies
> to get so high. Is there any chance you could trigger a trace with the
> I-pipe tracer?
That seems high even to me. I got into that range on the Cyclone V eval
board with PREEMPT_RT alone.
prev parent reply other threads:[~2014-01-08 3:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-07 19:52 [Xenomai] Altera Cyclone V Lowell Gilbert
2014-01-07 20:25 ` Gilles Chanteperdrix
2014-01-08 22:45 ` Lowell Gilbert
2014-01-08 23:19 ` Gilles Chanteperdrix
2014-01-09 18:06 ` Lowell Gilbert
2014-01-10 0:14 ` Gilles Chanteperdrix
2014-01-14 0:15 ` Lowell Gilbert
2014-01-07 22:19 ` Charles Steinkuehler
2014-01-07 22:47 ` Gilles Chanteperdrix
2014-01-07 22:55 ` Charles Steinkuehler
2014-01-07 23:13 ` Gilles Chanteperdrix
2014-01-08 0:51 ` Charles Steinkuehler
2014-01-08 4:04 ` Charles Steinkuehler
2014-01-08 8:21 ` Gilles Chanteperdrix
2014-01-08 8:58 ` Gilles Chanteperdrix
2014-01-11 10:22 ` [Xenomai] i-pipe tracer on in production kernels? (was Re: Altera Cyclone V) Michael Haberler
2014-01-11 12:16 ` Gilles Chanteperdrix
2014-01-11 18:11 ` Gilles Chanteperdrix
2014-01-11 18:20 ` Philippe Gerum
2014-01-11 18:27 ` Gilles Chanteperdrix
2014-01-11 19:01 ` Philippe Gerum
2014-01-11 19:11 ` Gilles Chanteperdrix
2014-01-08 3:21 ` Lowell Gilbert [this message]
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