Need Info on FootPrint and bootup time

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Need Info on FootPrint and bootup time

mahesh.kalachary

Hi Guys,

I need the below details w.r.t to eCOS. The H/W is based on ARM7TDMI,

1.      Memory Footprint, dynamic RAM usage for a bare minimum kernel
2.      Boot up time
3.      Interrupt latency

Best regards,
Mahesh. K



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Re: Need Info on FootPrint and bootup time

elektrknight
Mahesh,
 
> 1.      Memory Footprint, dynamic RAM usage for a bare minimum kernel

 In my experience with  ARM7TDMI you can get the kernel down to about 2kB of RAM.
Of course you have to compromise and tune it but it still a usable system.
Once I got to 2kB I have stopped tunig it that but I think it could be squeezed
even more.

 In my case the port was for Philips ARM family of LPC213x/4x. On a high end
devices like LPC2138 and LPC2148 it gives you about 30kB or 38kB of RAM for
user applications which is plenty for me.

>2.      Boot up time
Depends on your start-up code and specific CPU, do you intialize a lot of hardware?
If not then it can be very fast.
 
>3.      Interrupt latency
I have not measured it yet and I am very curious if anybody has a hard interrupt latency
and jitter numbers.

Thanks,
Pawel Wodnicki

 -------------- Original message ----------------------
From: <[hidden email]>

>
> Hi Guys,
>
> I need the below details w.r.t to eCOS. The H/W is based on ARM7TDMI,
>
> 1.      Memory Footprint, dynamic RAM usage for a bare minimum kernel
>
> 2.      Boot up time
>
> 3.      Interrupt latency
>
> Best regards,
> Mahesh. K
>
>
>
> Confidentiality Notice
>
>
> The information contained in this electronic message and any attachments to this
> message are intended
> for the exclusive use of the addressee(s) and may contain confidential or
> privileged information. If
> you are not the intended recipient, please notify the sender at Wipro or
> [hidden email] immediately
> and destroy all copies of this message and any attachments.
>
> --
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
>



--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss