[ECOS] memory allocation
Sat Jan 26 16:22:00 GMT 2002
Thanks for your reply.
I want to clarify my question for Memory allocation.
I want to know the following detailed information about memory allocation in
1. Do you have benchmark for memory allocation? in Deterministic or
I would appreciate if anyone can give more detailed benchmark for message
transactions on Intel Xscale. such as memory allocation, message
send,dispatch/schedule switching, message receive time.
2. Does eCos have the capability for memory allocation to user processes,
including management of shared memory space ?
3. Does eCos have protection from user corruption of system memory space ?
4. Does eCos allow multiple threads (within the same group) share a
(protected) memory space?
And additional question about eCos:
1. Does eCos have porting experience for distributed RTOS?
2. Does eCos have porting experience on multiprocessing porting, especially
on Intel Xscale?
From: Jonathan Larmour [mailto:firstname.lastname@example.org]
Sent: Friday, January 25, 2002 2:00 PM
To: Jing Luo
Cc: 'Ravi Kumar B S'; email@example.com
Subject: Re: [ECOS] round-robin
Jing Luo wrote:
> Hi Ravi,
> Thanks for your reply.
> I am working on Intel 80200 based on Xscale Microarchitecture.
> Does someone have experience to port eCos on this microprocessor?
> I am trying to evaluate eCos to see if it fits our requirement.
> I have some more questions about eCos on Xscale, wish someone can give me
> 1. Does eCos have task limitation on Xscale in Multitasking?
eCos is multi-threaded, not multi-tasking. A lot of efficient RTOS's are
like that to avoid the overhead of task switching.
As for the number of threads, there isn't any real limit using the default
multi-level queue scheduler.
> 2. Pend on the logical AND/OR of event flags is available?
Yes eCos has a "flags" synchronization object, an idea based on uItron (and
used by the uItron compatibility layer).
> 3. How eCos dealing with memory partition services?
What do you mean?
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