From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jakub Nowacki <j.s.nowacki@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] Xenomai on i7-870
Date: Mon, 20 Jun 2011 17:02:39 +0200 [thread overview]
Message-ID: <4DFF610F.5070602@domain.hid> (raw)
In-Reply-To: <BANLkTin00xA-LMikumq1C4_nFyFbCdgi+Q@mail.gmail.com>
On 06/20/2011 04:34 PM, Jakub Nowacki wrote:
> Interestingly, I'm getting the same results for core2 kernel without
> SMI workaround working. I was just getting high latencies approx. 70
> us for generic kernel. I'm not sure though how is it possible. Also,
> the higher latencies of above 10 us are arriving not too often but
> relatively regularly (without any visible pattern, though). I'm not
> sure if such a latencies are rather normal or caused by something
> 'bad'.
To make proper benchmarks, you should:
- let the latency run long
- provide some load, you can use the dohell script in xenomai-head to
generate the load.
That said, having some spikes is not abnormal. The real question is to
know whether the latencies your get are sufficient for your application.
> ioctl(RTTST_RTIOC_SWTEST_CREATE_KTASK): Cannot allocate memory
You have to increase CONFIG_XENO_OPT_SYS_STACKPOOLSZ.
--
Gilles.
next prev parent reply other threads:[~2011-06-20 15:02 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-16 9:18 [Xenomai-help] Xenomai on i7-870 Jakub Nowacki
2011-06-16 10:37 ` Gilles Chanteperdrix
2011-06-17 14:05 ` Jakub Nowacki
2011-06-17 19:00 ` Gilles Chanteperdrix
2011-06-17 19:44 ` Gilles Chanteperdrix
2011-06-17 19:52 ` Jakub Nowacki
2011-06-18 15:17 ` Gilles Chanteperdrix
2011-06-20 14:34 ` Jakub Nowacki
2011-06-20 15:02 ` Gilles Chanteperdrix [this message]
2011-06-20 15:25 ` Jakub Nowacki
2011-06-20 16:16 ` Philippe Gerum
2011-06-20 17:34 ` Gilles Chanteperdrix
2011-06-20 21:30 ` Jakub Nowacki
2011-06-20 22:54 ` [Xenomai-help] Xenomai beagleboard xm ethernet not working David Wiebe
2011-06-21 6:54 ` Gilles Chanteperdrix
2011-06-21 8:18 ` David Wiebe
2011-06-21 8:38 ` [Xenomai-help] Xenomai beagleboard xm ethernet working! David Wiebe
2011-06-21 10:37 ` Gilles Chanteperdrix
2011-06-20 17:43 ` [Xenomai-help] Xenomai on i7-870 Gilles Chanteperdrix
2011-06-17 19:48 ` Jakub Nowacki
-- strict thread matches above, loose matches on Subject: below --
2011-06-16 9:19 Jakub Nowacki
2011-06-13 10:44 Jakub Nowacki
2011-06-13 17:43 ` Gilles Chanteperdrix
2011-06-13 19:06 ` Jakub Nowacki
2011-06-14 5:58 ` Jan Kiszka
2011-06-14 11:18 ` Jakub Nowacki
2011-06-14 11:30 ` Jan Kiszka
2011-06-15 16:21 ` Jakub Nowacki
2011-06-15 16:51 ` Gilles Chanteperdrix
2011-06-15 20:43 ` Jakub Nowacki
2011-06-16 7:01 ` Gilles Chanteperdrix
2011-06-16 8:52 ` Pavel Machek
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