TX53-8030 Memory Speed

TX53-8030 Memory Speed

[Günter Gebhardt]

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Hello,

we integrated KARO TX53-8030 support into our barebox 2012.07.0 some month 
ago.

We measured the performance of memcpy() and found that the throughput is only 
19MB/s. We expected it to be something like 10 times faster.

We saw that there is support for the TX-53 in general within the head of 
barebox.

Within the file arch/arm/boards/karo-tx53/flash_header.c it 
is stated that it only supports TX53 1011 (i.e. 1GB RAM).

Do You have settings applicable to our device? 

What throughput do You expect from this device? 

Are there some things to be aware of?

Kind Regard,
Guenter Gebhadt

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Re: TX53-8030 Memory Speed

[Sascha Hauer]

On Thu, Nov 15, 2012 at 07:59:22AM +0100, Günter Gebhardt wrote:
> Hello,
> 
> we integrated KARO TX53-8030 support into our barebox 2012.07.0 some month 
> ago.
> 
> We measured the performance of memcpy() and found that the throughput is only 
> 19MB/s. We expected it to be something like 10 times faster.
> 
> We saw that there is support for the TX-53 in general within the head of 
> barebox.
> 
> Within the file arch/arm/boards/karo-tx53/flash_header.c it 
> is stated that it only supports TX53 1011 (i.e. 1GB RAM).

Support for the TX53-8030 is currently in the -next branch, but
unfortunately it doesn't seem to work properly, see this thread:

http://lists.infradead.org/pipermail/barebox/2012-November/010983.html

> 
> Do You have settings applicable to our device? 
> 
> What throughput do You expect from this device? 

Just rechecked on my 1011 board (I can't find the 8030 board atm,
otherwise I would have fixed the support already), it's about
230MB/s using memcpy on the commandline. Probably you don't have
the MMU turned on which means you're running without data chaches.

Sascha

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