From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai] Ipipe-core patched kernel fails to start when certain platform drivers are enabled
Date: Fri, 1 May 2015 16:00:18 +0200 [thread overview]
Message-ID: <20150501140018.GF1993@hermes.click-hack.org> (raw)
In-Reply-To: <20150501134547.GF24389@csclub.uwaterloo.ca>
On Fri, May 01, 2015 at 09:45:47AM -0400, Lennart Sorensen wrote:
> On Thu, Apr 30, 2015 at 11:27:49PM +0200, Gilles Chanteperdrix wrote:
> The exynos5420 has a 32bit timer at 24MHz. It wraps every 178 seconds.
> Good thing we only use that as a build box.
Xenomai extends counters to 64 bits in software. So, if that counter
was used as a tsc by Xenomai, it would wrap in :
(1 << 64) / 24000000 = 768614336404 s
That is:
768614336404 / (365 * 24 * 3600) = 24372 years.
--
Gilles.
next prev parent reply other threads:[~2015-05-01 14:00 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-30 15:53 [Xenomai] Ipipe-core patched kernel fails to start when certain platform drivers are enabled Hongfei Cheng
2015-04-30 16:17 ` Gilles Chanteperdrix
2015-04-30 18:12 ` Hongfei Cheng
2015-04-30 18:14 ` Gilles Chanteperdrix
2015-04-30 18:17 ` Hongfei Cheng
2015-04-30 18:31 ` Gilles Chanteperdrix
2015-04-30 20:04 ` Hongfei Cheng
2015-04-30 20:14 ` Gilles Chanteperdrix
2015-04-30 21:21 ` Lennart Sorensen
2015-04-30 21:27 ` Gilles Chanteperdrix
2015-05-01 13:45 ` Lennart Sorensen
2015-05-01 13:56 ` Gilles Chanteperdrix
2015-05-01 14:36 ` Lennart Sorensen
2015-05-01 14:44 ` Gilles Chanteperdrix
2015-05-01 15:33 ` Lennart Sorensen
2015-05-13 17:01 ` Lennart Sorensen
2015-05-13 17:33 ` Lennart Sorensen
2015-05-01 14:00 ` Gilles Chanteperdrix [this message]
2015-04-30 21:34 ` Gilles Chanteperdrix
2015-05-01 14:20 ` Lennart Sorensen
2015-05-01 14:30 ` Gilles Chanteperdrix
2015-05-01 15:11 ` Lennart Sorensen
2015-05-01 15:22 ` Gilles Chanteperdrix
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