This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
Re: memory allocation
- From: Jonathan Larmour <jlarmour at redhat dot com>
- To: Jing Luo <Jing at vicom dot com>
- Cc: "'Ravi Kumar B S'" <ravi_kumar at mindtree dot com>,"'ecos-discuss at sources dot redhat dot com'" <ecos-discuss at sources dot redhat dot com>
- Date: Wed, 30 Jan 2002 01:19:19 +0000
- Subject: [ECOS] Re: memory allocation
- References: <B26EACBBAF91D411BD8500508BF7D695051CE7@earth.vicom.com>
Jing Luo wrote:
>
> Hi,
>
> I haven't got answer for the memory allocation and performance for eCos.
>
> For the MAX multi-thread eCos supported, I am not sure that eCos can support
> unlimited thread concurrently.
>
> I got the report on internet, it said the max thread priorities eCos can
> support is 32. I don't know if it is changed.
> http://www.dedicated-systems.com/encyc/buyersguide/rtos/Object153.html
Actually this is an interesting point as I see the basis for why it says
that: CYGNUM_KERNEL_SCHED_PRIORITIES in the kernel configuration is limited
to 1 to 32. But for the mlqueue scheduler that restriction should not
apply. You could just remove the "legal_values" line I'm pretty sure.
> I checked the online document, the current released eCos version is 1.4. But
> all the discussion are based on 1.3.1.
> And the CVS site has the source code for 1.3.1.
The latest is something like 1.5.10 actually. But these aren't public
releases. The latest public release is 1.3.1. More up-to-date releases have
only been available to paying customers - everyone else can use the
anonymous CVS repository if they need more recent changes. That will change
when v2.0 is out.
Jifl
--
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine