This is very interesting. I only started thinking about it because I set
up my house machine using the EMC live cd and noticed only one core was
being used. As I don't actually need RTAI on this machine I simply
switched to the generic kernel which has SMP.
Les
Alex Joni wrote:
>
> I think the
John Kasunich wrote:
>Stephen Wille Padnos wrote:
>
>
>>I have done reasonably extensive testing on an Intel Core 2 Duo CPU, and
>>I found that the latencies weren't improved much simply by using an
>>isolated CPU. What did help (a lot!) was making the Linux-managed core
>>do a lot of nothin
Stephen Wille Padnos wrote:
>
> I have done reasonably extensive testing on an Intel Core 2 Duo CPU, and
> I found that the latencies weren't improved much simply by using an
> isolated CPU. What did help (a lot!) was making the Linux-managed core
> do a lot of nothing. Running the bash scri
Michael Buesch wrote:
>[snip]
>
>Nice. What are the basic config settings you have to do?
>How to bind rtai to a CPU?
>
>
RTAPI already does this - it uses the highest numbered active CPU for RT
tasks when compiled for SMP.
You need to use a kernel command-line parameter, isolcpus. This is a
> when booting the linux kernel you use isolcpus
> (http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/re46.html)
> Note: isolcpus is supposed to get deprecated in favour of another
> mechanism.
Here's an example using cpusets:
http://kerneltrap.org/mailarchive/linux-kernel/
> On Monday 01 December 2008 18:57:50 Chris Radek wrote:
>> On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote:
>> > Is it possible to use EMC with multi-core processors? I see that by
>> > default the kernel is compiled to only support one processor but what
>> > would happen if SMP s
On Monday 01 December 2008 18:57:50 Chris Radek wrote:
> On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote:
> > Is it possible to use EMC with multi-core processors? I see that by
> > default the kernel is compiled to only support one processor but what
> > would happen if SMP support
> On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote:
>> Is it possible to use EMC with multi-core processors? I see that by
>> default the kernel is compiled to only support one processor but what
>> would happen if SMP support was compiled in? Would RTAI choke?
>>
>> As multi-core pro
On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote:
> Is it possible to use EMC with multi-core processors? I see that by
> default the kernel is compiled to only support one processor but what
> would happen if SMP support was compiled in? Would RTAI choke?
>
> As multi-core processo
