From: Philippe Gerum <rpm@xenomai.org>
To: Thomas Necker <Thomas.Necker@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Increasing UVMs heap size
Date: Tue, 31 Oct 2006 09:32:01 +0100 [thread overview]
Message-ID: <1162283521.4996.26.camel@domain.hid> (raw)
In-Reply-To: <OF46135D04.DC659798-ONC1257218.0026EC51@domain.hid>
On Tue, 2006-10-31 at 08:12 +0100, Thomas Necker wrote:
> I tried to increase the heap size for UVM. I did so by using
> --enable-uvm-heapsz=512 when compiling the user space parts
> and also setting CONFIG_XENO_OPT_SYS_HEAPSZ=512 in the
> kernel configuration. Somehow it seems to work, at least I now can
> create a lot more pSOS skin queues than before. However, if I do
> a "cat /proc/xenomai/heap" I still get "size=131072:used=16:pagesz=512".
> So, why can't I see the increased heap size here? Thanks.
>
Because passing --enable-uvm-heapsz changes the heap size for the
local/slave nucleus embodied (as a library) into your application
process (i.e. the UVM). /proc/xenomai/heap reports this size for the
"master" nucleus running in kernel space, each slave nucleus end up
using to emulate context switches and other low-level ops. UVM
strangeness.
> Thomas
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
prev parent reply other threads:[~2006-10-31 8:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-31 7:12 [Xenomai-help] Increasing UVMs heap size Thomas Necker
2006-10-31 8:32 ` Philippe Gerum [this message]
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