From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Wolfgang Grandegger <wg@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] Mode switch when using RT heap on ARM
Date: Thu, 13 Nov 2008 18:57:41 +0100 [thread overview]
Message-ID: <491C6A95.9000802@domain.hid> (raw)
In-Reply-To: <491805AE.1060809@domain.hid>
Wolfgang Grandegger wrote:
> Hello,
>
> I realized that accessing memory allocated with rt_heap_alloc() causes
> mode switches on ARM i.mx31. The attached patch provides a demo program
> to demonstrate the problem, which actually does *not* show up on my
> PowerPC TQM5200 board.
Ok. I ran your test on an ARMv5 using an old version of Xenomai, and I
only get a fault on first write to the heap, being either cached or non
cached.
I will now run the tests on AT91RM9200 with a more recent version of
xenomai to confirm that we get the same effect, but if we do, this means
that we are facing an armv6 specific issue and that for a workaround, we
need to understand armv6 memory management.
--
Gilles.
next prev parent reply other threads:[~2008-11-13 17:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-10 9:58 [Xenomai-help] Mode switch when using RT heap on ARM Wolfgang Grandegger
2008-11-10 11:42 ` Gilles Chanteperdrix
2008-11-10 12:32 ` Wolfgang Grandegger
2008-11-10 12:35 ` Wolfgang Grandegger
[not found] ` <c54f288fee2b8a5ee68a00c27056c6ed.squirrel@domain.hid>
2008-11-10 18:55 ` Wolfgang Grandegger
2008-11-10 19:02 ` Gilles Chanteperdrix
2008-11-10 20:05 ` Wolfgang Grandegger
2008-11-11 22:46 ` Gilles Chanteperdrix
2008-11-12 8:55 ` Wolfgang Grandegger
2008-11-12 9:12 ` Philippe Gerum
2008-11-12 10:24 ` Gilles Chanteperdrix
2008-11-12 10:50 ` Wolfgang Grandegger
2008-11-12 11:12 ` Philippe Gerum
2008-11-12 11:20 ` Wolfgang Grandegger
2008-11-13 17:57 ` Gilles Chanteperdrix [this message]
2008-11-13 18:27 ` Wolfgang Grandegger
2008-11-13 18:23 ` Gilles Chanteperdrix
2008-11-13 18:39 ` Wolfgang Grandegger
2008-11-13 18:15 ` Gilles Chanteperdrix
2008-11-13 20:15 ` Wolfgang Grandegger
2008-11-14 8:22 ` Gilles Chanteperdrix
2008-11-14 9:46 ` Wolfgang Grandegger
2008-11-14 9:45 ` Gilles Chanteperdrix
2008-11-17 13:41 ` Gilles Chanteperdrix
-- strict thread matches above, loose matches on Subject: below --
2008-11-11 11:24 Gilles Chanteperdrix
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=491C6A95.9000802@domain.hid \
--to=gilles.chanteperdrix@xenomai.org \
--cc=wg@domain.hid \
--cc=xenomai@xenomai.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.