What does Montavista Linux gives you in addition to standard Linux ?

What does Montavista Linux gives you in addition to standard Linux ?

[LEROY Christophe]

Hi,

I thought that Montavista had really improved the realtime of Linux,
but i've been told that Montavista has only improved realtime for threads
and for SMP.
It means it is only interesting if you have only one process per CPU, with
a lot of threads inside it.

Is that right ?

If it is right, I can't see any interest of using Linux for embedded
systems.

Thanks

Christophe


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Re: What does Montavista Linux gives you in addition to standard Linux ?

[Cort Dougan]

There are a number of advantages to using Linux in embedded applications -
regardless of what MontaVista has or has not done.  They are not embedded
Linux, they just use it.  Don't judge all of embedded Linux by one company.

Do you mean Linux for realtime applications?  There are many low-latency
style projects to improve standard linux real-time performance along with
FSMLabs RTLinux hard-realtime work.  There's a lot to choose from no matter
what your needs are.

} I thought that Montavista had really improved the realtime of Linux,
} but i've been told that Montavista has only improved realtime for threads
} and for SMP.
} It means it is only interesting if you have only one process per CPU, with
} a lot of threads inside it.
}
} Is that right ?
}
} If it is right, I can't see any interest of using Linux for embedded
} systems.

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Re: What does Montavista Linux gives you in addition to standard Linux ?

[Kurt Wall]

Speaking anonymously, LEROY Christophe told us:
>
> Hi,
>
> I thought that Montavista had really improved the realtime of Linux,
> but i've been told that Montavista has only improved realtime for threads
> and for SMP.

I guess you'd have to try it and see for yourself.

> It means it is only interesting if you have only one process per CPU, with
> a lot of threads inside it.
>
> Is that right ?
>
> If it is right, I can't see any interest of using Linux for embedded
> systems.

As someone else wrote, Montavista Linux isn't the only real-time or
embedded Linux. You might have a look at TimeSys Linux:
http://www.timesys.com/.

Kurt (not speaking for my employer)
--
The cow is nothing but a machine which makes grass fit for us people to
eat.
		-- John McNulty

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Re: What does Montavista Linux gives you in addition to standard Linux ?

[Todd Poynor]

> I thought that Montavista had really improved the realtime of Linux,
> but i've been told that Montavista has only improved realtime for threads
> and for SMP.
> It means it is only interesting if you have only one process per CPU, with
> a lot of threads inside it.

It sounds like you've been misinformed.  Rather than try to hash all
that out here on the list, refer to these articles that describe
MontaVista's (and other's) contributions to realtime Linux and see if
your questions are answered:

http://www.linuxdevices.com/articles/AT5503476267.html
http://www.linuxdevices.com/articles/AT4185744181.html
--
Todd


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